Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2010-12-03
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
To be published in the on-line version of the Proceedings of Cool Stars 16 (ASP Conference Series). This is an updated version
Scientific paper
Mid-infrared data, including Spitzer warm-IRAC [3.6] and [4.5] photometry, is critical for understanding the cold population of brown dwarfs now being found, objects which have more in common with planets than stars. As effective temperature (T_eff) drops from 800 K to 400 K, the fraction of flux emitted beyond 3 microns increases rapidly, from about 40% to >75%. This rapid increase makes a color like H-[4.5] a very sensitive temperature indicator, and it can be combined with a gravity- and metallicity-sensitive color like H-K to constrain all three of these fundamental properties, which in turn gives us mass and age for these slowly cooling objects. Determination of mid-infrared color trends also allows better exploitation of the WISE mission by the community. We use new Spitzer Cycle 6 IRAC photometry, together with published data, to present trends of color with type for L0 to T10 dwarfs. We also use the atmospheric and evolutionary models of Saumon & Marley to investigate the masses and ages of 13 very late-type T dwarfs, which have H-[4.5] > 3.2 and T_eff ~ 500 K to 750 K.
Albert Loic
Artigau Étienne
Burningham Ben
Delfosse Xavier
Delorme Patrick
No associations
LandOfFree
Spitzer Mid-Infrared Photometry of 500 - 750 K Brown Dwarfs does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Spitzer Mid-Infrared Photometry of 500 - 750 K Brown Dwarfs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spitzer Mid-Infrared Photometry of 500 - 750 K Brown Dwarfs will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-513321