Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-01-31
Astronomy and Astrophysics
Astrophysics
8 pages, 2 figures. Accepted in Astrophysical Journal Letters
Scientific paper
10.1086/319499
Infrared spectroscopic observations of LL Andromedae and EF Eridani are presented. Our K band spectrum of LL Andromedae reveals the presence of methane absorption in the secondary star indicating an effective temperature less than 1300K, similar to a "T" type methane brown dwarf. The secondary star in EF Eridani is seen to be warmer with an effective temperature of ~1650K and a spectroscopic classification consistent with an L4-5 star. Both secondaries have theoretical mass estimates of 0.04-0.055 solar masses (40-55 Jupiter masses). Our IR spectroscopic observations of LL And and EF Eri provide the first direct proof of the theoretical prediction that post-period minimum cataclysmic variables contain brown dwarf-like secondary stars.
Ciardi David R.
Howell Steve B.
No associations
LandOfFree
Spectroscopic Discovery of Brown Dwarf-like Secondary Stars in the Cataclysmic Variables LL And and EF Eri 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 Spectroscopic Discovery of Brown Dwarf-like Secondary Stars in the Cataclysmic Variables LL And and EF Eri, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectroscopic Discovery of Brown Dwarf-like Secondary Stars in the Cataclysmic Variables LL And and EF Eri will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-297698