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
The Long-standing Closure Crisis in Coronal Plasmas
J. D. Scudder
<jats:title>Abstract</jats:title> <jats:p>Coronal and solar wind physics have long used plasma fluid models to motivate physical explanations of observations; the hypothesized model is introduced into a fluid simulation to see if observations are reproduced. This procedure is called Verification of Mechanism (VoM) modeling; it is contingent on the self consistency of the closure that made the simulation possible. Inner corona VoMs typically assume weak gradient Spitzer–Braginskii closures. Four prominent coronal VoMs in place for decades are shown to contradict their closure hypotheses, demonstrably shaping coronal and solar wind research. These findings have been possible since 1953. This unchallenged evolution is worth understanding, so that similarly flawed VoMs do not continue to mislead new research. As a first step in this direction, this paper organizes four a posteriori quantitative tests for the purpose of easily screening the physical integrity of a proposed VoM. A fifth screen involving the thermal force, the tandem of the heat flux, has been shown to be mandatory when VoMs involve species-specific energy equations. VoM modeling will soon be required to advance <jats:italic>Parker Solar Probe</jats:italic> and <jats:italic>Solar Orbiter</jats:italic> science. Such modeling cannot advance the physical understanding sought by these missions unless the closures adopted (i) are demonstrated to be self consistent for the VoM plasma Knudsen numbers, (ii) are verified a posteriori as possessing nonnegative VDFs throughout the simulated volume, and (iii) include the physical completeness of thermal force physics when the VoM requires species-specific energy equations.</jats:p>
Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.
Pp. 148
Sodium and Potassium Signatures of Volcanic Satellites Orbiting Close-in Gas Giant Exoplanets
Apurva V. Oza; Robert E. Johnson; Emmanuel Lellouch; Carl Schmidt; Nick Schneider; Chenliang Huang; Diana Gamborino; Andrea Gebek; Aurelien Wyttenbach; Brice-Olivier Demory; Christoph Mordasini; Prabal Saxena; David Dubois; Arielle Moullet; Nicolas Thomas
<jats:title>Abstract</jats:title> <jats:p>Extrasolar satellites are generally too small to be detected by nominal searches. By analogy to the most active body in the solar system, Io, we describe how sodium (Na <jats:sc>i</jats:sc>) and potassium (K <jats:sc>i</jats:sc>) gas could be a signature of the geological activity venting from an otherwise hidden exo-Io. Analyzing ∼a dozen close-in gas giants hosting robust alkaline detections, we show that an Io-sized satellite can be stable against orbital decay below a planetary tidal <jats:inline-formula> <jats:tex-math> <?CDATA ${{ \mathcal Q }}_{p}\lesssim {10}^{11}$?> </jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="apjab40ccieqn1.gif" xlink:type="simple" /> </jats:inline-formula>. This tidal energy is also focused into the satellite driving an ∼10<jats:sup>5±2</jats:sup> higher mass-loss rate than Io’s supply to Jupiter’s Na exosphere based on simple atmospheric loss estimates. The remarkable consequence is that several exo-Io column densities are, on average, more than sufficient to provide the ∼10<jats:sup>10±1</jats:sup> Na cm<jats:sup>−2</jats:sup> required by the equivalent width of exoplanet transmission spectra. Furthermore, the benchmark observations of both Jupiter’s extended (∼1000 <jats:italic>R</jats:italic> <jats:sub>J</jats:sub>) Na exosphere and Jupiter’s atmosphere in transmission spectroscopy yield similar Na column densities that are purely exogenic in nature. As a proof of concept, we fit the “high-altitude” Na at WASP-49b with an ionization-limited cloud similar to the observed Na profile about Io. Moving forward, we strongly encourage time-dependent ingress and egress monitoring along with spectroscopic searches for other volcanic volatiles.</jats:p>
Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.
Pp. 168
NuSTAR and Chandra Observations of New X-Ray Transients in the Central Parsec of the Galaxy
Kaya Mori; Charles J. Hailey; Shifra Mandel; Yve E. Schutt; Matteo Bachetti; Anna Coerver; Frederick K. Baganoff; Hannah Dykaar; Jonathan E. Grindlay; Daryl Haggard; Keri Heuer; Jaesub Hong; Benjamin J. Hord; Chichuan Jin; Melania Nynka; Gabriele Ponti; John A. Tomsick
Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.
Pp. 142
Testing Stellar Evolution with Asteroseismic Inversions of a Main-sequence Star Harboring a Small Convective Core
Earl P. Bellinger; Sarbani Basu; Saskia Hekker; Jørgen Christensen-Dalsgaard
Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.
Pp. 143
Global Radiation Magnetohydrodynamic Simulations of sub-Eddington Accretion Disks around Supermassive Black Holes
Yan-Fei Jiang; Omer Blaes; James M. Stone; Shane W. Davis
Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.
Pp. 144
The Next Generation Virgo Cluster Survey. XVII. A Search for Planetary Nebulae in Virgo Cluster Globular Clusters
Weijia Sun; Eric W. Peng; Youkyung Ko; Patrick Côté; Laura Ferrarese; Myung Gyoon Lee; Chengze Liu; Alessia Longobardi; Igor V. Chilingarian; Chelsea Spengler; Ann I. Zabludoff; Hong-Xin Zhang; Jean-Charles Cuillandre; Stephen D. J. Gwyn
Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.
Pp. 145
A Three-phase Approach to Grain Surface Chemistry in Protoplanetary Disks: Gas, Ice Surfaces, and Ice Mantles of Dust Grains
Maxime Ruaud; Uma Gorti
Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.
Pp. 146
Prevalence of SED Turndown among Classical Be Stars: Are All Be Stars Close Binaries?
Robert Klement; A. C. Carciofi; T. Rivinius; R. Ignace; L. D. Matthews; K. Torstensson; D. Gies; R. G. Vieira; N. D. Richardson; A. Domiciano de Souza; J. E. Bjorkman; G. Hallinan; D. M. Faes; B. Mota; A. D. Gullingsrud; C. de Breuck; P. Kervella; M. Curé; D. Gunawan
Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.
Pp. 147
Emission from a Pulsar Wind Nebula: Application to the Persistent Radio Counterpart of FRB 121102
Yu-Han Yang; Zi-Gao Dai
Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.
Pp. 149
Measurement of the Extragalactic Background Light Spectral Energy Distribution with VERITAS
A. U. Abeysekara; A. Archer; W. Benbow; R. Bird; A. Brill; R. Brose; M. Buchovecky; D. Calderon-Madera; J. L. Christiansen; W. Cui; M. K. Daniel; A. Falcone; Q. Feng; M. Fernandez-Alonso; J. P. Finley; L. Fortson; A. Furniss; A. Gent; C. Giuri; O. Gueta; D. Hanna; T. Hassan; O. Hervet; J. Holder; G. Hughes; T. B. Humensky; C. A. Johnson; P. Kaaret; M. Kertzman; D. Kieda; M. Krause; F. Krennrich; S. Kumar; M. J. Lang; G. Maier; P. Moriarty; R. Mukherjee; M. Nievas-Rosillo; S. O’Brien; R. A. Ong; K. Pfrang; M. Pohl; R. R. Prado; E. Pueschel; J. Quinn; K. Ragan; P. T. Reynolds; D. Ribeiro; G. T. Richards; E. Roache; A. C. Rovero; I. Sadeh; M. Santander; G. H. Sembroski; K. Shahinyan; I. Sushch; T. Svraka; A. Weinstein; R. M. Wells; P. Wilcox; A. Wilhelm; D. A. Williams; T. J Williamson; B. Zitzer
Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.
Pp. 150