Not exact matches
On Proxima Centauri b, the
model indicates that high
stellar wind pressure would cause the
atmosphere to escape and prevent
atmosphere from lasting long enough to give rise to surface - based life as we know it.
In two papers in The Astrophysical Journal Letters, the scientists develop
models showing that the
stellar wind — the constant outpouring of charged particles that sweep out into space — could severely deplete the
atmosphere of such planets over hundreds of millions of years, rendering them unable to host surface - based life as we know it.
Whereas the lower
atmosphere (at altitudes of less than 200 kilometers) is consistent with ground - based
stellar occultations, the upper
atmosphere is much colder and more compact than indicated by pre-encounter
models.
The ability to accurately determine the rate of this H - 17O fusion reaction provides nuclear physicists with another key puzzle piece, alongside direct observations of oxygen elemental and isotopic abundances in
stellar atmospheres and in primitive meteorites, to zero in on complete and accurate
models of stars.
Ongoing radio observations (SMA, JCMT, VLA) of Sirius A are being used to set an observationally determined standard for
stellar atmosphere modeling and debris disk studies around A stars, as well as to take the first step toward characterizing potential intrinsic uncertainty in
stellar emission at these wavelengths.
In 1970, Bolton was the first to develop a computer
model for
stellar atmospheres that was able to generate large regions of the
modeled spectrum with enough precision to allow comparison with the spectra from real stars.
1:20 PM Liu - Abundance Studies of
Stellar Hosts of Terrestrial Planets 1:40 PM Kitiashvili - 3D Realistic
Modeling of
Stellar Convection as a Tool to Study Effects of
Stellar Jitter on RV Measurements 2:00 PM Crossfield - Planet Densities (invited) 2:30 PM Break and Poster Viewing 3:00 PM Guyon - Coronagraphs for Planet Detection (invited) 3:30 PM Martins - Exoplanet Reflections in the era of Giant Telescopes 3:50 PM Close - Direct Detection of Exoplanets with GMT AO: A proof of concept design for a GMT Phase A ExAO planet imager 4:10 PM Direct Imaging Discussion - Led by Jared Males 5:20 PM End of meeting for the day 5:30 PM Buses depart for Monterey Bay Aquarium 6:00 PM Conference Banquet Wednesday, September 28 7:30 - 9:00 AM Breakfast 9:00 AM Lewis - JWST - ELT Synergy (invited) 9:30 AM Greene - Characterizing exoplanet
atmospheres with JWST 9:50 AM Morzinski - Breaking degeneracies in understanding fundamental exoplanet properties with ELTs 10:10 AM Break and Poster Viewing 11:00 AM Cotton - Detecting Clouds in Hot Jupiters with Linear Polarisation 11:20 AM Boss - Summary
For all too long the theorists have depended on GHG theories based on a
model of
stellar atmospheres with an infinite depth.