Subjects -> ASTRONOMY (Total: 94 journals)
Showing 1 - 46 of 46 Journals sorted alphabetically
Advances in Astronomy     Open Access   (Followers: 51)
Annual Review of Astronomy and Astrophysics     Full-text available via subscription   (Followers: 39)
Annual Review of Earth and Planetary Sciences     Full-text available via subscription   (Followers: 63)
Artificial Satellites     Open Access   (Followers: 23)
Astrobiology     Hybrid Journal   (Followers: 14)
Astronomical & Astrophysical Transactions: The Journal of the Eurasian Astronomical Society     Hybrid Journal   (Followers: 6)
Astronomical Journal     Full-text available via subscription   (Followers: 8)
Astronomical Review     Open Access   (Followers: 4)
Astronomische Nachrichten     Hybrid Journal   (Followers: 4)
Astronomy & Geophysics     Hybrid Journal   (Followers: 48)
Astronomy and Astrophysics     Full-text available via subscription   (Followers: 60)
Astronomy and Astrophysics     Open Access   (Followers: 32)
Astronomy and Computing     Hybrid Journal   (Followers: 2)
Astronomy Letters     Hybrid Journal   (Followers: 22)
Astronomy Reports     Hybrid Journal   (Followers: 15)
Astronomy Studies Development     Open Access   (Followers: 12)
Astroparticle Physics     Hybrid Journal   (Followers: 8)
Astrophysical Bulletin     Hybrid Journal   (Followers: 3)
Astrophysical Journal     Full-text available via subscription   (Followers: 19)
Astrophysical Journal Letters     Full-text available via subscription   (Followers: 14)
Astrophysical Journal Supplement Series     Full-text available via subscription   (Followers: 14)
Astrophysics     Hybrid Journal   (Followers: 29)
Astrophysics and Space Science     Hybrid Journal   (Followers: 46)
Astrophysics and Space Sciences Transactions (ASTRA)     Open Access   (Followers: 56)
Astropolitics: The International Journal of Space Politics & Policy     Hybrid Journal   (Followers: 12)
Celestial Mechanics and Dynamical Astronomy     Hybrid Journal   (Followers: 11)
Chinese Astronomy and Astrophysics     Full-text available via subscription   (Followers: 24)
Colloid Journal     Hybrid Journal   (Followers: 3)
Comptes Rendus Physique     Full-text available via subscription   (Followers: 2)
Computational Astrophysics and Cosmology     Open Access   (Followers: 3)
COSPAR Colloquia Series     Full-text available via subscription   (Followers: 11)
Earth, Moon, and Planets     Hybrid Journal   (Followers: 55)
Earth, Planets and Space     Open Access   (Followers: 74)
EAS Publications Series     Full-text available via subscription   (Followers: 8)
EPL Europhysics Letters     Partially Free   (Followers: 8)
Experimental Astronomy     Hybrid Journal   (Followers: 39)
Expert Opinion on Astronomy and Astrophysics     Open Access   (Followers: 7)
Extreme Life, Biospeology & Astrobiology - International Journal of the Bioflux Society     Full-text available via subscription   (Followers: 6)
Few-Body Systems     Hybrid Journal   (Followers: 1)
Foundations of Physics     Hybrid Journal   (Followers: 41)
Frontiers in Astronomy and Space Sciences     Open Access   (Followers: 12)
Galaxies     Open Access   (Followers: 6)
Globe, The     Full-text available via subscription   (Followers: 4)
Gravitation and Cosmology     Hybrid Journal   (Followers: 4)
Icarus     Hybrid Journal   (Followers: 75)
International Journal of Advanced Astronomy     Open Access   (Followers: 28)
International Journal of Astrobiology     Hybrid Journal   (Followers: 4)
International Journal of Astronomy     Open Access   (Followers: 19)
International Journal of Astronomy and Astrophysics     Open Access   (Followers: 29)
International Journal of Satellite Communications Policy and Management     Hybrid Journal   (Followers: 13)
International Letters of Chemistry, Physics and Astronomy     Open Access   (Followers: 12)
ISRN Astronomy and Astrophysics     Open Access   (Followers: 7)
Journal for the History of Astronomy     Full-text available via subscription   (Followers: 19)
Journal of Astrobiology & Outreach     Open Access   (Followers: 3)
Journal of Astronomical Instrumentation     Open Access   (Followers: 3)
Journal of Astronomical Telescopes, Instruments, and Systems     Hybrid Journal   (Followers: 5)
Journal of Astrophysics     Open Access   (Followers: 26)
Journal of Astrophysics and Astronomy     Open Access   (Followers: 52)
Journal of Atmospheric and Solar-Terrestrial Physics     Hybrid Journal   (Followers: 199)
Journal of Cosmology and Astroparticle Physics     Hybrid Journal   (Followers: 38)
Journal of Geophysical Research : Planets     Full-text available via subscription   (Followers: 179)
Journal of Geophysical Research : Space Physics     Full-text available via subscription   (Followers: 178)
Journal of High Energy Astrophysics     Full-text available via subscription   (Followers: 22)
Kinematics and Physics of Celestial Bodies     Hybrid Journal   (Followers: 10)
KronoScope     Hybrid Journal   (Followers: 1)
Macalester Journal of Physics and Astronomy     Open Access   (Followers: 4)
MNASSA : Monthly Notes of the Astronomical Society of South Africa     Full-text available via subscription   (Followers: 1)
Molecular Astrophysics     Full-text available via subscription   (Followers: 1)
Monthly Notices of the Royal Astronomical Society     Hybrid Journal   (Followers: 14)
Monthly Notices of the Royal Astronomical Society : Letters     Hybrid Journal  
Nature Astronomy     Hybrid Journal   (Followers: 8)
New Astronomy     Hybrid Journal   (Followers: 27)
New Astronomy Reviews     Full-text available via subscription   (Followers: 17)
Nonlinear Dynamics     Hybrid Journal   (Followers: 19)
NRIAG Journal of Astronomy and Geophysics     Open Access   (Followers: 5)
Open Astronomy     Open Access   (Followers: 2)
Physics of the Dark Universe     Open Access   (Followers: 4)
Planetary and Space Science     Hybrid Journal   (Followers: 101)
Planetary Science     Open Access   (Followers: 52)
Proceedings of the International Astronomical Union     Full-text available via subscription   (Followers: 2)
Publications of the Astronomical Society of Australia     Hybrid Journal   (Followers: 2)
Publications of the Astronomical Society of Japan     Hybrid Journal   (Followers: 3)
Publications of the Astronomical Society of the Pacific     Full-text available via subscription   (Followers: 4)
Research & Reviews : Journal of Space Science & Technology     Full-text available via subscription   (Followers: 17)
Research in Astronomy and Astrophysics     Full-text available via subscription   (Followers: 29)
Revista Mexicana de AstronomĂ­a y AstrofĂ­sica     Open Access   (Followers: 2)
Science China Physics, Mechanics & Astronomy     Hybrid Journal   (Followers: 4)
Solar Physics     Hybrid Journal   (Followers: 34)
Solar System Research     Hybrid Journal   (Followers: 14)
Space Science International     Open Access   (Followers: 192)
Space Science Reviews     Hybrid Journal   (Followers: 97)
Space Weather     Full-text available via subscription   (Followers: 24)
Transport and Aerospace Engineering     Open Access   (Followers: 13)
Universe     Open Access   (Followers: 5)
Similar Journals
Journal Cover
Astrophysical Journal Letters
Journal Prestige (SJR): 3.186
Citation Impact (citeScore): 5
Number of Followers: 14  
 
  Full-text available via subscription Subscription journal
ISSN (Print) 2041-8205 - ISSN (Online) 2041-8213
Published by American Astronomical Society Homepage  [3 journals]
  • Neutron Star Mergers in Active Galactic Nucleus Accretion Disks: Cocoon
           and Ejecta Shock Breakouts
    • Authors: Jin-Ping Zhu; Bing Zhang, Yun-Wei Yu, He Gao
      Abstract: Neutron star mergers are believed to occur in accretion disks around supermassive black holes. Here we show that a putative jet launched from the merger of a binary neutron star (BNS) or a neutron star–black hole (NSBH) merger occurring at the migration trap in an active galactic nucleus (AGN) disk would be choked. The jet energy is deposited within the disk materials to power a hot cocoon. The cocoon is energetic enough to break out from the AGN disk and produce a bright X-ray shock breakout transient peaking at ∼0.15 days after the merger. The peak luminosity is estimated as ##IMG## [http://ej.iop.org/images/2041-8205/906/2/L11/apjlabd412ieqn1.gif] {$\sim {10}^{46}\,\mathrm{erg}\,{{\rm{s}}}^{-1}$} , which can be discovered by the Einstein Probe from ##IMG## [http://ej.iop.org/images/2041-8205/906/2/L11/apjlabd412ieqn2.gif] {$z\lesssim 0.5$} . Later on, the nonrelativistic ejecta launched from the merger would break out the disk, poweri...
      Citation: The Astrophysical Journal Letters
      PubDate: 2021-01-12T00:00:00Z
      DOI: 10.3847/2041-8213/abd412
      Issue No: Vol. 906, No. 2 (2021)
       
  • Bursts before Burst: A Comparative Study on FRB 200428-associated and
           FRB-absent X-Ray Bursts from SGR J1935+2154
    • Authors: Yu-Han Yang; Bin-Bin Zhang, Lin Lin, Bing Zhang, Guo-Qiang Zhang, Yi-Si Yang, Zuo-Lin Tu, Jin-Hang Zou, Hao-Yang Ye, Fa-Yin Wang, Zi-Gao Dai
      Abstract: Accompanied by an X-ray burst, the fast radio burst (FRB) FRB 200428 was recently confirmed as originating from the Galactic magnetar soft gamma repeater (SGR) SGR J1935+2154. Just before and after FRB 200428 was detected, the Five-hundred-meter Aperture Spherical radio Telescope (FAST) had been monitoring SGR J1935+2154 for eight hours. From UTC 2020 April 27 23:55:00 to 2020 April 28 00:50:37, FAST detected no pulsed radio emission from SGR J1935+2154, while Fermi/Gamma-ray Burst Monitor registered 34 bursts in the X/soft γ -ray band, forming a unique sample of X-ray bursts in the absence of FRBs. After a comprehensive analysis on light curves, time-integrated, and time-resolved spectral properties of these FRB-absent X-ray bursts, we compare this sample with the FRB-associated X-ray burst detected by Insight-HXMT, INTEGRAL, and Konus-Wind. The FRB-associated burst distinguishes itself from other X-ray bursts by its nonthermal spectrum and a higher spectral peak energy, ...
      Citation: The Astrophysical Journal Letters
      PubDate: 2021-01-12T00:00:00Z
      DOI: 10.3847/2041-8213/abd02a
      Issue No: Vol. 906, No. 2 (2021)
       
  • Electromagnetic Signatures of Relativistic Explosions in the Disks of
           Active Galactic Nuclei
    • Authors: Rosalba Perna; Davide Lazzati, Matteo Cantiello
      Abstract: The disks of active galactic nuclei (AGNs), traditionally studied as feeders of the supermassive black holes (SMBHs) at their centers, are also hosts to massive stars and hence their neutron star (NS) and black hole (BH) remnants. Migration traps and gas torques in these disks favor binary formation and enhance the rate of compact object mergers. In these environments both long gamma-ray bursts (GRBs) from the death of massive stars and short GRBs from NS–NS to NS–BH mergers are expected. However, their properties in the environment of AGN disks have never been studied. Here we show that GRBs in AGN disks can display unique features, owing to the unusual relative position of the shocks that characterize the burst evolution and the Thomson photosphere of the AGN disk. In dense environments, for example, a relativistic reverse shock develops early, likely powering the prompt emission instead of internal shocks. The transient’s time evolution is also compressed, yielding afterglow ...
      Citation: The Astrophysical Journal Letters
      PubDate: 2021-01-11T00:00:00Z
      DOI: 10.3847/2041-8213/abd319
      Issue No: Vol. 906, No. 2 (2021)
       
  • MUSE Reveals Extended Circumnuclear Outflows in the Seyfert 1 NGC 7469
    • Authors: A. C. Robleto-Orús; J. P. Torres-Papaqui, A. L. Longinotti, R. A. Ortega-Minakata, S. F. Sánchez, Y. Ascasibar, E. Bellocchi, L. Galbany, M. Chow-Martínez, J. J. Trejo-Alonso, A. Morales-Vargas, F. J. Romero-Cruz
      Abstract: NGC 7469 is a well-known luminous infrared galaxy, with a circumnuclear star formation ring (∼830 pc radius) surrounding a Seyfert 1 active galactic nucleus (AGN). Nuclear unresolved winds were previously detected in X-rays and ultraviolet, as well as an extended biconical outflow in infrared coronal lines. We search for extended outflows by measuring the kinematics of the H β and [O iii ] λ 5007 optical emission lines, in data of the Very Large Telescope/Multi-unit Spectroscopic Explorer integral field spectrograph. We find evidence of two outflow kinematic regimes: one slower regime extending across most of the star formation (SF) ring—possibly driven by the massive SF—and a faster regime (with a maximum velocity of −715 km s −1 ), only observed in [O iii ], in the western region between the AGN and the massive star-forming regions of the ring, likely AGN-driven. This work shows a case where combined AGN/SF f...
      Citation: The Astrophysical Journal Letters
      PubDate: 2021-01-11T00:00:00Z
      DOI: 10.3847/2041-8213/abd32f
      Issue No: Vol. 906, No. 2 (2021)
       
  • Spiral Arm Pattern Motion in the SAO 206462 Protoplanetary Disk
    • Authors: Chengyan Xie; Bin Ren, Ruobing Dong, Laurent Pueyo, Jean-Baptiste Ruffio, Taotao Fang, Dimitri Mawet, Tomas Stolker
      Abstract: Spiral arms have been observed in more than a dozen protoplanetary disks, yet the origin of nearly all systems is under debate. Multi-epoch monitoring of spiral arm morphology offers a dynamical way to distinguish two leading arm formation mechanisms: companion-driven and gravitational instability induction, since these mechanisms predict distinct motion patterns. By analyzing multi-epoch J -band observations of the SAO 206462 system using the SPHERE instrument on the Very Large Telescope in 2015 and 2016, we measure the pattern motion for its two prominent spiral arms in polarized light. On one hand, if both arms are comoving, they can be driven by a planet at ##IMG## [http://ej.iop.org/images/2041-8205/906/2/L9/apjlabd241ieqn1.gif] {${86}_{-13}^{+18}$} au on a circular orbit, with gravitational instability motion ruled out. On the other hand, they can be driven by two planets at ##IMG## [http://ej.iop.org/im...] {${120}_{-30}^{+30}$}
      Citation: The Astrophysical Journal Letters
      PubDate: 2021-01-11T00:00:00Z
      DOI: 10.3847/2041-8213/abd241
      Issue No: Vol. 906, No. 2 (2021)
       
  • A Sharp Rise in the Detection Rate of Broad Absorption Line Variations in
           a Quasar SDSS J141955.26+522741.1
    • Authors: Qinyuan Zhao; Zhicheng He, Guilin Liu, Tinggui Wang, Hengxiao Guo, Lu Shen, Guobin Mou
      Abstract: We present an analysis of the variability of broad absorption lines (BALs) in a quasar SDSS J141955.26+522741.1 at z = 2.145 with 72 observations from the Sloan Digital Sky Survey Data Release 16 (SDSS DR16). The strong correlation between the equivalent widths of BALs and the continuum luminosity, reveals that the variation of BAL troughs is dominated by the photoionization. The photoionization model predicts that when the time interval Δ T between two observations is longer than the recombination timescale t rec , the BAL variations can be detected. This can be characterized as a “sharp rise” in the detection rate of BAL variation at Δ T = t rec . For the first time, we detect such a “sharp rise” signature in the detection rate of BAL variations. As a result, we propose that the t rec can be obtained from the “sharp rise” of the detection rate of BAL variation. It is worth mentioning that the BAL variations...
      Citation: The Astrophysical Journal Letters
      PubDate: 2021-01-11T00:00:00Z
      DOI: 10.3847/2041-8213/abd318
      Issue No: Vol. 906, No. 2 (2021)
       
  • Evidence of a Clear Atmosphere for WASP-62b: The Only Known Transiting Gas
           Giant in the JWST Continuous Viewing Zone
    • Authors: Munazza K. Alam; Mercedes López-Morales, Ryan J. MacDonald, Nikolay Nikolov, James Kirk, Jayesh M. Goyal, David K. Sing, Hannah R. Wakeford, Alexander D. Rathcke, Drake L. Deming, Jorge Sanz-Forcada, Nikole K. Lewis, Joanna K. Barstow, Thomas Mikal-Evans, Lars A. Buchhave
      Abstract: Exoplanets with cloud-free, haze-free atmospheres at the pressures probed by transmission spectroscopy represent a valuable opportunity for detailed atmospheric characterization and precise chemical abundance constraints. We present the first optical to infrared (0.3−5 μ m) transmission spectrum of the hot Jupiter WASP-62b, measured with Hubble/STIS and Spitzer/IRAC. The spectrum is characterized by a 5.1 σ detection of Na i absorption at 0.59 μ m, in which the pressure-broadened wings of the Na D-lines are observed from space for the first time. A spectral feature at 0.4 μ m is tentatively attributed to SiH at 2.1 σ confidence. Our retrieval analyses are consistent with a cloud-free atmosphere without significant contamination from stellar heterogeneities. We simulate James Webb Space Telescope (JWST) observations, for a combination of instrument modes, to assess the atmospheric characterization potential of WASP-62b. We de...
      Citation: The Astrophysical Journal Letters
      PubDate: 2021-01-11T00:00:00Z
      DOI: 10.3847/2041-8213/abd18e
      Issue No: Vol. 906, No. 2 (2021)
       
  • Rapid Deceleration of Blast Waves Witnessed in Tycho’s Supernova
           Remnant
    • Authors: Takaaki Tanaka; Tomoyuki Okuno, Hiroyuki Uchida, Hiroya Yamaguchi, Shiu-Hang Lee, Keiichi Maeda, Brian J. Williams
      Abstract: In spite of their importance as standard candles in cosmology and as major major sites of nucleosynthesis in the universe, the kinds of progenitor systems that lead to Type Ia supernovae (SNe Ia) remains a subject of considerable debate in the literature. This is true even for the case of Tycho’s supernova (SN) that exploded in 1572, although it has been deeply studied both observationally and theoretically. Analyzing X-ray data of Tycho’s supernova remnant (SNR) obtained with Chandra in 2003, 2007, 2009, and 2015, we discover that the expansion before 2007 was substantially faster than radio measurements reported in the past decades and then rapidly decelerated during the last ∼15 yr. The result is well explained if the shock waves recently hit a wall of dense gas surrounding the SNR. In fact, such a gas structure is expected in the so-called single-degenerate scenario, in which the progenitor is a binary system consisting of a white dwarf and a stellar companion, whereas it is...
      Citation: The Astrophysical Journal Letters
      PubDate: 2021-01-06T00:00:00Z
      DOI: 10.3847/2041-8213/abd6cf
      Issue No: Vol. 906, No. 1 (2021)
       
  • On the True Fractions of Repeating and Nonrepeating Fast Radio Burst
           Sources
    • Authors: Shunke Ai; He Gao, Bing Zhang
      Abstract: Observationally, fast radio bursts (FRBs) can be divided into repeating and apparently nonrepeating (one-off) ones. It is unclear whether all FRBs repeat and whether there are genuine nonrepeating FRBs. We attempt to address these questions using Monte Carlo simulations. We define a parameter T c at which the accumulated number of nonrepeating sources becomes comparable to the total number of repeating sources, which is a good proxy to denote the intrinsic repeater fraction among FRBs. Assuming that both types of sources exist and their burst energies follow power-law distributions, we investigate how the observed repeater fraction evolves with time for different parameters. If the lifetime of repeaters is sufficiently long that the evolutionary effect can be neglected within the observational time span, unless T c → ∞ (i.e., there is no genuine nonrepeating FRB source), the observed repeater fraction should increase with ti...
      Citation: The Astrophysical Journal Letters
      PubDate: 2021-01-06T00:00:00Z
      DOI: 10.3847/2041-8213/abcec9
      Issue No: Vol. 906, No. 1 (2021)
       
  • Physics of Nonuniversal Larson’s Relation
    • Authors: Renyue Cen
      Abstract: From a new perspective, we reexamine self-gravity and turbulence jointly, in hopes of understanding the physical basis for one of the most important empirical relations governing clouds in the interstellar medium (ISM), the Larson’s relation relating velocity dispersion ( σ R ) to cloud size ( R ). We report on two key new findings. First, the correct form of the Larson’s relation is ##IMG## [http://ej.iop.org/images/2041-8205/906/1/L4/apjlabcecbieqn1.gif] {${\sigma }_{R}={\alpha }_{v}^{1/5}{\sigma }_{\mathrm{pc}}{(R/1\mathrm{pc})}^{3/5}$} , where α v is the virial parameter of clouds and σ pc is the strength of the turbulence, if the turbulence has the Kolmogorov spectrum. Second, the amplitude of Larson’s relation, σ pc , is not universal, differing by a factor of about 2 between clouds on the Galactic disk and those at the Galactic center, as evidenced by observati...
      Citation: The Astrophysical Journal Letters
      PubDate: 2021-01-06T00:00:00Z
      DOI: 10.3847/2041-8213/abcecb
      Issue No: Vol. 906, No. 1 (2021)
       
 
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