Results 61 to 70 of about 215,434 (305)

JWST-TST DREAMS: Secondary Atmosphere Constraints for the Habitable Zone Planet TRAPPIST-1 e

The Astrophysical Journal Letters
The TRAPPIST-1 system offers one of the best opportunities to characterize temperate terrestrial planets beyond our own solar system. Within the TRAPPIST-1 system, planet e stands out as highly likely to sustain surface liquid water if it possesses an ...
Ana Glidden, Sukrit Ranjan, Sara Seager, Néstor Espinoza, Ryan J. MacDonald, Natalie H. Allen, Caleb I. Cañas, David Grant, Amélie Gressier, Kevin B. Stevenson, Natasha E. Batalha, Nikole K. Lewis, Douglas Long, Hannah R. Wakeford, Lili Alderson, Ryan C. Challener, Knicole Colón, Jingcheng Huang, Zifan Lin, Dana R. Louie, Elijah Mullens, Kristin S. Sotzen, Jeff A. Valenti, Daniel Valentine, Mark Clampin, C. Matt Mountain, Marshall Perrin, Roeland P. van der Marel   +27 more
doaj   +1 more source

Implications of Atmospheric Nondetections for Trappist-1 Inner Planets on Atmospheric Retention Prospects for Outer Planets

The Astrophysical Journal Letters, 2023
JWST secondary eclipse observations of Trappist-1b seemingly disfavor atmospheres >∼1 bar since heat redistribution is expected to yield dayside emission temperature below the ∼500 K observed.
Joshua Krissansen-Totton
doaj   +1 more source

On the Radiative Equilibrium of a Stellar Atmosphere. XXII.

The Astrophysical Journal, 1944
In this paper the methods developed in earlier papers are extended to solving the problem of radiative transfer in curved atmospheres, i.e., to solving the equation of transfer μ∂l/∂r+(1-μ 2 )/r 2 ∂l/∂μ=-κρI+½κρ∫ +1 -1 Idμ, where κρ is a function only of r.
openaire   +2 more sources

On the Radiative Equilibrium of a Stellar Atmosphere. XIX.

The Astrophysical Journal, 1947
In this paper we tabulate the various H-functions which occur in the solutions of transfer problems involving Rayleigh's phase function and Rayleigh scattering (including the state of polarization of the scattered radiation). The H-functions have been determined numerically as the solutions of the exact functional equations which they satisfy.
S. Chandrasekhar, Frances H. Breen
openaire   +1 more source

Spherically symmetric model stellar atmospheres and limb darkening

, 2013
Limb darkening is a fundamental ingredient for interpreting observations of planetary transits, eclipsing binaries, optical/infrared interferometry and microlensing events.
H. R. Neilson, Lester, J. B., J. B. Lester, Neilson, H. R.   +3 more
core   +1 more source

Oncogenic DMTF1β promotes cancer cell motility by regulating autophagy through ULK1 stabilization

Molecular Oncology, EarlyView.
In the current study, we demonstrate that the oncogene DMTF1β regulates ULK1 stability by reducing its proteasomal degradation in cancer cells. This stabilization enables ULK1 to induce autophagy, which in turn facilitates cancer cell migration. Consequently, reduced DMTF1β levels lead to decreased autophagy and impaired cancer cell migration.
Jun Xu, Nicolas J. Niklaus, Anna M. Schläfli, Igor Tokarchuk, Magali Humbert, Federico La Manna, Bich Vu, David Maul, Ramin Radpour, Marianna Kruithof‐de Julio, Inti Zlobec, Jörn Dengjel, Bruce E. Torbett, Mario P. Tschan   +13 more
wiley   +1 more source

Atmospheric evolution through outgassing and escape on young molten rocky exoplanets

Astronomy & Astrophysics
Context. The earliest rocky planet atmospheres were shaped by the competition between initial volatile inventories and atmospheric escape driven by stellar irradiation.
Postolec Emma, Lichtenberg Tim, Nicholls Harrison, Soucasse Laurent, van der Tak Floris   +4 more
doaj   +1 more source

Stark broadening parameter tables for neutral calcium spectral lines. I [PDF]

Serbian Astronomical Journal, 1999
Using a semiclassical approach, we have calculated electron−, proton−, He II−, Mg II-, Si II- and Fe II-impact line widths and shifts for 189 Ca I multiplets as a function of temperature.
Dimitrijević M.S., Sahal−Bréchot S.
doaj   +1 more source

The future of stellar model atmospheres: macroscopic nightmares?

, 2004
Stellar atmospheres represent unique windows for understanding stellar, galactic and cosmic evolution by being responsible for the emission of stellar spectra.
M. Asplund
core   +1 more source

Spectroscopic study of stellar atmospheres. [PDF]

, 2023
Precise atmospheric parameters and the chemical composition of stars are important factors for studying stars, i. e. for collecting information on stellar classes and spectral types.
Jasaitė, Emilė,
core