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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

https://creativecommons.org/licenses/by/4.0/

Cobertura temática

Ciencias físicas

Tabla de contenidos

doi: 10.3847/1538-4357/ab4d4b

Resolving the Interstellar Medium in the Nuclear Region of Two z = 5.78 Quasar Host Galaxies with ALMA

Ran Wang; Yali Shao; Chris L. Carilli; Gareth C. Jones; Fabian Walter; Xiaohui Fan; Dominik A. Riechers; Roberto Decarli; Frank Bertoldi; Jeff Wagg; Michael A. Strauss; Alain Omont; Pierre Cox; Linhua Jiang; Desika Narayanan; Karl M. Menten; Bram P. Venemans

Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.

Pp. 40

doi: 10.3847/1538-4357/ab4bca

The Fate of Asymptotic Giant Branch Winds in Massive Galaxies and the Intracluster Medium

Yuan Li; Greg L. Bryan; Eliot Quataert

Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.

Pp. 41

doi: 10.3847/1538-4357/ab43c6

Magnetic-field-aligned Electric Fields and Nonresonant Acceleration in Alfvénic Turbulence

B. R. Ragot

Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.

Pp. 42

doi: 10.3847/1538-4357/ab4e18

Constraining the Stochastic Gravitational Wave from String Cosmology with Current and Future High-frequency Detectors

Yufeng Li; Xilong Fan; Lijun Gou

<jats:title>Abstract</jats:title> <jats:p>Pre–Big Bang models in string cosmology predict a relic background of gravitational wave radiation in the early universe. The spectrum of this background shows that the energy density rises rapidly with frequency, which is an interesting target for high-frequency (i.e., kilohertz) detectors. In this paper, we discussed the constraining power of multiple configurations of current and future gravitational wave detector (GWD) networks to the stochastic background predicted in string cosmology. The constraining power is jointly determined by the overlap reduction function and the sensitivity curves of multiple detectors. And we further elaborated on the possible contribution of a future Chinese detector and a kilohertz detector to the constraining power of detector network for stochastic background in string cosmology. Our results show that the detectability of the GWD network for the string cosmology gravitational wave background will improve considerably with the joining of a Chinese detector. This is because a Chinese detector (e.g., located at Wuhan), together with KAGRA, has a better overlap reduction function than the laser interferometer gravitational wave observatory detector pair, and therefore lead to more stringent limits for stochastic background detection. And with ideal overlap reduction function, namely, colocated detectors, a kilohertz sensitivity curve has better performance than previous detectors for stochastic background detection. Finally, the results are compared with the limitations given by the observational constraint of the Big Bang nucleosynthesis bound.</jats:p>

Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.

Pp. 28

Accedé al texto completo

doi: 10.3847/1538-4357/ab4da6

The Effect of Land Fraction and Host Star Spectral Energy Distribution on the Planetary Albedo of Terrestrial Worlds

Andrew J. Rushby; Aomawa L. Shields; Manoj Joshi

<jats:title>Abstract</jats:title> <jats:p>The energy balance and climate of planets can be affected by the reflective properties of their land, ocean, and frozen surfaces. Here we investigate the effect of host star spectral energy distribution (SED) on the albedo of these surfaces using a one-dimensional energy balance model. Incorporating spectra of M-, K-, G-, and F-dwarf stars, we determined the effect of varying fractional and latitudinal distribution of land and ocean surfaces as a function of host star SED on the overall planetary albedo, climate, and ice-albedo feedback response. While noting that the spatial distribution of land masses on a given planet will have an effect on the overall planetary energy balance, we find that terrestrial planets with higher average land/ocean fractions are relatively cooler and have higher albedo regardless of star type. For Earth-like planets orbiting M-dwarf stars, the increased absorption of water ice in the near-infrared, where M-dwarf stars emit much of their energy, resulted in warmer global mean surface temperatures, ice lines at higher latitudes, and increased climate stability as the ice-albedo feedback became negative at high land fractions. Conversely, planets covered largely by ocean, and especially those orbiting bright stars, had a considerably different energy balance due to the contrast between the reflective land and the absorptive ocean surface, which in turn resulted in warmer average surface temperatures than land-covered planets and a stronger potential ice-albedo feedback. While dependent on the properties of individual planetary systems, our results place some constraints on a range of climate states of terrestrial exoplanets based on albedo and incident flux.</jats:p>

Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.

Pp. 29