High Tide or Riptide on the Cosmic Shoreline? A Water-rich Atmosphere or Stellar Contamination for the Warm Super-Earth GJ 486b from JWST Observations [PDF]
Astrophysical Journal Letters, 2023 Planets orbiting M-dwarf stars are prime targets in the search for rocky exoplanet atmospheres. The small size of M dwarfs renders their planets exceptional targets for transmission spectroscopy, facilitating atmospheric characterization.
S. Moran +23 more
semanticscholar +1 more source
The stellar atmosphere physical system I. Phenomenological definition and representation of a stellar atmosphere [PDF]
Serbian Astronomical Journal, 2018 This paper is the first in a series of two that deals with the physical and numerical grounds of stellar atmosphere modelling. After a phenomenological definition of a star and stellar atmosphere, the physics that shapes the stellar atmosphere ...
Crivellari Lucio
doaj +1 more source
Research on Stellar Occultation Detection with Bandpass Filtering for Oxygen Density Retrieval
Remote Sensing, 2023 Stellar occultation instruments detect the transmission of stellar spectra through the planetary atmosphere to retrieve densities of various atmospheric components.
Zheng Li +6 more
doaj +1 more source
A new method to compute limb-darkening coefficients for stellar atmosphere models with spherical symmetry: the space missions TESS, Kepler, CoRoT, and MOST [PDF]
Astronomy & Astrophysics, 2018 Aims. One of the biggest problems we can encounter while dealing with the limb-darkening coefficients for stellar atmospheric models with spherical symmetry is the difficulty of adjusting both the limb and the central parts simultaneously. In particular,
A. Claret
semanticscholar +1 more source
The stellar atmosphere physical system II. An operative sequential algorithm to solve the stellar atmosphere problem [PDF]
Serbian Astronomical Journal, 2019 In this paper, the second and the last of the series, we present a sequential algorithm to solve the stellar atmosphere problem that may serve as a paradigm for the solution of more general non-linear and non-local problems.
Crivellari Lucio
doaj +1 more source
Convection Currents in Stellar Atmospheres [PDF]
Proceedings of the National Academy of Sciences, 1924 C E, John, W S, Adams
openaire +4 more sources
A New Stellar Atmosphere Grid and Comparisons with HST/STIS CALSPEC Flux Distributions [PDF]
, 2017 The Space Telescope Imaging Spectrograph has measured the spectral energy distributions for several stars of types O, B, A, F, and G. These absolute fluxes from the CALSPEC database are fit with a new spectral grid computed from the ATLAS-APOGEE ATLAS9 ...
R. Bohlin +5 more
semanticscholar +1 more source
Opacities and Atomic Diffusion
Galaxies, 2023 Opacity is a fundamental quantity for stellar modeling, and it plays an essential role throughout the life of stars. After gravity drives the collapse of interstellar matter into a protostar, the opacity determines how this matter is structured around ...
Georges Alecian, Morgan Deal
doaj +1 more source
The Stagger-grid: A grid of 3D stellar atmosphere models - IV. Limb darkening coefficients [PDF]
, 2014 Aims. We compute the emergent stellar spectra from the UV to far infrared for different viewing angles using realistic 3D model atmospheres for a large range in stellar parameters to predict the stellar limb darkening. Methods.
Z. Magic +3 more
semanticscholar +1 more source
The Stagger-grid: A grid of 3D stellar atmosphere models - III. The relation to mixing length convection theory [PDF]
, 2014 Aims. We investigate the relation between 1D atmosphere models that rely on the mixing length theory and models based on full 3D radiative hydrodynamic (RHD) calculations to describe convection in the envelopes of late-type stars. Methods.
Z. Magic, A. Weiss, M. Asplund
semanticscholar +1 more source