Catálogo de publicaciones - revistas
Título de Acceso Abierto
The Astrophysical Journal (ApJ)
Resumen/Descripción – provisto por la editorial en inglés
The Astrophysical Journal is an open access journal devoted to recent developments, discoveries, and theories in astronomy and astrophysics. Publications in ApJ constitute significant new research that is directly relevant to astrophysical applications, whether based on observational results or on theoretical insights or modeling.Palabras clave – provistas por la editorial
astronomy; astrophysics
Disponibilidad
| Institución detectada | Período | Navegá | Descargá | Solicitá |
|---|---|---|---|---|
| No detectada | desde jul. 1995 / hasta dic. 2023 | IOPScience |
Información
Tipo de recurso:
revistas
ISSN impreso
0004-637X
ISSN electrónico
1538-4357
Editor responsable
American Astronomical Society (AAS)
Idiomas de la publicación
- inglés
País de edición
Reino Unido
Información sobre licencias CC
Cobertura temática
Tabla de contenidos
Spectral and Timing Analysis of NuSTAR and Swift/XRT Observations of the X-Ray Transient MAXI J0637–430
Hadar Lazar
; John A. Tomsick; Sean N. Pike; Matteo Bachetti; Douglas J. K. Buisson; Riley M. T. Connors; Andrew C. Fabian; Felix Fuerst; Javier A. García; Jeremy Hare; Jiachen Jiang; Aarran W. Shaw; Dominic J. Walton
Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.
Pp. 155
No Detectable Kilonova Counterpart is Expected for O3 Neutron Star–Black Hole Candidates
Jin-Ping Zhu; Shichao Wu; Yuan-Pei Yang; Bing Zhang; Yun-Wei Yu; He Gao; Zhoujian Cao; Liang-Duan Liu
Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.
Pp. 156
Panspermia in a Milky Way–like Galaxy
Raphael Gobat; Sungwook E. Hong; Owain Snaith; Sungryong Hong
Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.
Pp. 157
New Limits on the Lorentz/CPT Symmetry Through 50 Gravitational-wave Events
Ziming Wang; Lijing Shao; Chang Liu
Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.
Pp. 158
Uncovering Intense Ancient Solar Activity from Naked-eye Observations of Egg-like Sunspots
Hongrui Wang; Huiduan Li
Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.
Pp. 159
A 99 minute Double-lined White Dwarf Binary from SDSS-V
Vedant Chandra; Hsiang-Chih Hwang; Nadia L. Zakamska; Boris T. Gänsicke; J. J. Hermes; Axel Schwope; Carles Badenes; Gagik Tovmassian; Evan B. Bauer; Dan Maoz; Matthias R. Schreiber; Odette F. Toloza; Keith P. Inight; Hans-Walter Rix; Warren R. Brown
Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.
Pp. 160
Resolving the Fastest Ejecta from Binary Neutron Star Mergers: Implications for Electromagnetic Counterparts
Coleman Dean; Rodrigo Fernández; Brian D. Metzger
<jats:title>Abstract</jats:title> <jats:p>We examine the effect of spatial resolution on initial mass ejection in grid-based hydrodynamic simulations of binary neutron star mergers. The subset of the dynamical ejecta with velocities greater than ∼0.6<jats:italic>c</jats:italic> can generate an ultraviolet precursor to the kilonova on approximately hour timescales and contribute to a years long nonthermal afterglow. Previous work has found differing amounts of this fast ejecta, by one to two orders of magnitude, when using particle-based or grid-based hydrodynamic methods. Here, we carry out a numerical experiment that models the merger as an axisymmetric collision in a corotating frame, accounting for Newtonian self-gravity, inertial forces, and gravitational wave losses. The lower computational cost allows us to reach spatial resolutions as high as 4 m, or ∼3 × 10<jats:sup>−4</jats:sup> of the stellar radius. We find that fast ejecta production converges to within 10% for a cell size of 20 m. This suggests that fast ejecta quantities found in existing grid-based merger simulations are unlikely to increase to the level needed to match particle-based results upon further resolution increases. The resulting neutron-powered precursors are in principle detectable out to distances ≲200 Mpc with upcoming facilities.We also find that head-on collisions at the freefall speed, relevant for eccentric mergers, yield fast and slow ejecta quantities of order 10<jats:sup>−2</jats:sup> <jats:italic>M</jats:italic> <jats:sub>⊙</jats:sub>, with a kilonova signature distinct from that of quasi-circular mergers.</jats:p>
Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.
Pp. 161
Split Invariant Curves in Rotating Bar Potentials
Tian-Ye Xia; Juntai Shen
<jats:title>Abstract</jats:title> <jats:p>Invariant curves are generally closed curves in Poincaré's surface of section. Here we study an interesting dynamical phenomenon, first discovered by Binney et al. in a rotating Kepler potential, where an invariant curve of the surface of section can split into two disconnected line segments under certain conditions, which is distinctively different from the islands of resonant orbits. We first demonstrate the existence of split invariant curves in the Freeman bar model, where all orbits can be described analytically. We find that the split phenomenon occurs when orbits are nearly tangent to the minor/major axis of the bar potential. Moreover, the split phenomenon seems “necessary” to avoid invariant curves intersecting with each other. Such a phenomenon appears only in rotating potentials, and we demonstrate its universal existence in other general rotating bar potentials. It also implies that actions are no longer proportional to the area bounded by an invariant curve if the split occurs, but they can still be computed by other means.</jats:p>
Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.
Pp. 162
Merging Criteria for Planetesimal Collisions
Takashi Shibata; Eiichiro Kokubo; Natsuki Hosono
Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.
Pp. 163
Signature of a Heliotail Organized by the Solar Magnetic Field and the Role of Nonideal Processes in Modeled IBEX ENA Maps: A Comparison of the BU and Moscow MHD Models
M. Kornbleuth; M. Opher; I. Baliukin; M. A. Dayeh; E. Zirnstein; M. Gkioulidou; K. Dialynas; A. Galli; J. D. Richardson; V. Izmodenov; G. P. Zank; S. Fuselier
Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.
Pp. 164