astrobites
Courtney Dressing
Spectra of Earths Around Other Stars
How would the spectrum of the Earth change if our planet orbited a hotter or cooler star? Would alien astronomers still be able to detect signs of life?
Separating Signatures of Multiple Planets
Can we infer the presence of multiple planets by monitoring how a star’s brightness changes outside of planetary transit?
Searching for Giant Planets Around Baby Stars
How long does planetary migration take? Crockett et al. look for the answer by searching for hot Jupiters around extremely young stars.
Can Binary Star Systems Harbor Habitable Planets?
Astronomers recently announced the discovery of a short period Earth-mass planet in the Alpha Centauri system. Could Earth-mass planets exist in the habitable zones of binary stars?
Three New Small Stars
Low-mass stars are notoriously hard to model. What does the discovery of three new low-mass stars in binaries with Sun-like stars tell us about low-mass stars?
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Not Dead Yet: Signs of Cool Gas Around Elliptical Galaxies
Astronomers often refer to elliptical galaxies as “red and dead” because they appear red in color and aren’t currently forming stars. In this paper, the authors present evidence that elliptical galaxies might not be as dead as we assume.
Do Stellar Models Agree?
How well do stellar models match? Would astronomers using different stellar models and identical data determine consistent fits?
Snapshots from the IAU in Beijing
Over the past two weeks, several astrobites authors have been attending the 28th General Assembly of the International Astronomical Union in Beijing, China. Like the semi-annual AAS meetings in the United States, the IAU General Assemblies are large meetings covering a range of topics in astronomy. Each meeting is subdivided into symposia, special sessions, and [...]
That’s No Planet…It’s a Dust Cloud!
Could the strange transit-light signature seen in the light curve of a Kepler target be caused by a transiting dust cloud?
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