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Multi-band phase variations in principle allow us to infer the longitudinal temperature distributions of planets as a function of height in their atmospheres. For example, 3.6 micron emission originates from deeper layers of the atmosphere…

Earth and Planetary Astrophysics · Physics 2017-12-27 Ian Dobbs-Dixon , Nicolas B. Cowan

Gaia observations have reignited interest in the optical and ultraviolet (UV) opacity problems of cool white dwarfs ($T_{\rm eff} \leq 6000$ K), which were thought to be resolved nearly two decades ago through the inclusion of Lyman…

The atmospheres of exoplanets are commonly studied by observing the transit of the planet passing in front of its parent star. The obscuration of part of the stellar disk during a transit will reveal aspects of its surface structure…

Earth and Planetary Astrophysics · Physics 2015-02-04 Fei Yan , Robert A. E. Fosbury , Monika G. Petr-Gotzens , Gang Zhao , Enric Pallé

We exploit a large, complete optical diameter and HI flux limited sample of spiral galaxies with types later than S0a to derive a robust measurement of the HI mass function (HIMF) for masses log(M_HI/M_Sun) > 7.4 which takes into account…

Astrophysics · Physics 2009-11-10 Christopher M. Springob , Martha P. Haynes , Riccardo Giovanelli

Mass measurements and absorption line studies indicate that the stellar initial mass function (IMF) is bottom-heavy in the central regions of many early-type galaxies, with an excess of low mass stars compared to the IMF of the Milky Way.…

Astrophysics of Galaxies · Physics 2021-12-22 Pieter van Dokkum , Charlie Conroy

Mini-Neptunes orbiting M stars are a growing population of known exoplanets. Some of them are located very close to their host star, receiving large amounts of UV radiation. Many M stars emit strong chromospheric emission in the H I Lyman…

Earth and Planetary Astrophysics · Physics 2015-06-23 Yamila Miguel , Lisa Kaltenegger , Jeffrey L. Linsky , Sarah Rugheimer

A three-dimensional Monte Carlo Ly-alpha radiative transfer (RT) code, named LaRT, is developed to study the Ly-alpha RT and the Wouthuysen-Field (WF) effect. Using the code, we calculate the line profile of Ly-alpha radiation within the…

Astrophysics of Galaxies · Physics 2020-09-09 Kwang-Il Seon , Chang-Goo Kim

In a companion paper, Seitenzahl et al. (2013) presented a set of three-dimensional delayed detonation models for thermonuclear explosions of near-Chandrasekhar mass white dwarfs (WDs). Here, we present multi-dimensional radiative transfer…

High Energy Astrophysical Phenomena · Physics 2015-06-17 S. A. Sim , I. R. Seitenzahl , M. Kromer , F. Ciaraldi-Schoolmann , F. K. Röpke , M. Fink , W. Hillebrandt , R. Pakmor , A. J. Ruiter , S. Taubenberger

Line-intensity mapping (LIM) is quickly attracting attention as an alternative technique to probe large-scale structure and galaxy formation and evolution at high redshift. LIM one-point statistics are motivated because they provide access…

Cosmology and Nongalactic Astrophysics · Physics 2024-03-06 José Luis Bernal

Isotope effects associated with gas phase N2 photolysis are used to interpret Martian atmospheric evolution, icy satellite atmospheric chemistry and meteorite isotopic anomalies from nebular N2 photochemistry. To interpret observations at…

Chemical Physics · Physics 2011-10-18 B. H. Muskatel , F. Remacle , Mark. H. Thiemens , R. D. Levine

The nature of dark matter is a longstanding mystery in cosmology, which can be studied with laboratory or collider experiments, as well as astrophysical and cosmological observations. In this work, we propose realistic and efficient…

Cosmology and Nongalactic Astrophysics · Physics 2021-04-15 José Luis Bernal , Andrea Caputo , Marc Kamionkowski

The Laser Interferometer Lunar Antenna (LILA) presents a novel concept for observing gravitational waves from astrophysical sources at sub-Hertz frequencies. Compared to the Earth, the seismic environment of the moon, while uncertain, is…

General Relativity and Quantum Cosmology · Physics 2025-12-15 Brett N. Shapiro

Lyman-alpha (Ly{\alpha}) photons from ionizing sources and cooling radiation undergo a complex resonant scattering process that generates unique spectral signatures in high-redshift galaxies. We present a detailed Ly{\alpha} radiative…

This work reports the discovery of cycle-to-cycle modulated spectral line and atmospheric velocity gradient variability in long-period Cepheids based on 925 high-resolution optical spectra of $\ell$ Carinae (P $\sim$ 35.5 d) recorded during…

Solar and Stellar Astrophysics · Physics 2016-08-19 Richard I. Anderson

Nickel-based superalloys play a major role in many technologically relevant high temperature applications. Understanding and predicting the evolution of the phase microstructure during high temperature creep together with the evolution of…

Materials Science · Physics 2016-05-26 Ronghai Wu , Stefan Sandfeld

We model the primary crater production of small (D < 100 m) primary craters on Mars and the Moon using the observed annual flux of terrestrial fireballs. From the size-frequency distribution (SFD) of meteor diameters, with appropriate…

Earth and Planetary Astrophysics · Physics 2015-06-17 Jean-Pierre Williams , Asmin V. Pathare , Oded Aharonson

While the floors of deep lunar craters are largely shielded from solar radiation and thus provide an ideal thermal environment for water ice accumulation, meteoroids on highly inclined orbits can easily access permanently shadowed regions…

Earth and Planetary Astrophysics · Physics 2020-05-20 Petr Pokorny , Menelaos Sarantos , Diego Janches , Erwan Mazarico

The forward fitting of solar flare observations with radiation-hydrodynamic simulations is a common technique for learning about energy deposition and atmospheric evolution during these explosive events. A frequent spectral line choice for…

Solar and Stellar Astrophysics · Physics 2021-08-11 Christopher M. J. Osborne , Petr Heinzel , Jana Kašparová , Lyndsay Fletcher

In the leading theory of lunar formation, known as the giant impact hypothesis, a collision between two planet-size objects resulted in a young Earth surrounded by a circumplanetary debris disk from which the Moon later accreted. The range…

Earth and Planetary Astrophysics · Physics 2023-07-13 Miles Timpe , Christian Reinhardt , Thomas Meier , Joachim Stadel , Ben Moore

We investigate the influence of lunar-like satellites on the infrared orbital light curves of Earth-analog extra-solar planets. Such light curves will be obtained by NASA's Terrestrial Planet Finder (TPF) and ESA's Darwin missions as a…

Astrophysics · Physics 2015-05-13 Nicholas A. Moskovitz , Eric Gaidos , Darren Williams
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