Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...302..422m&link_type=abstract
Astronomy and Astrophysics, v.302, p.422
Astronomy and Astrophysics
Astrophysics
16
Stars: Flare, Stars: Late-Type, Stars: Euve J2056-17.1, Ultraviolet: Stars
Scientific paper
We present optical, ultraviolet (UV), and extreme ultraviolet (EUV) results for a new active late-type dwarf star discovered by the Extreme Ultraviolet Explorer (EUVE). A large flare with an energy in excess of 10^35^erg and duration of ~1.1 days was detected in the EUVE Lex/B band (60-200A). The energetics of the event indicate that radiative losses in the EUV are a significant contributor to the energy budget in stellar flares. The "quiescent" EUV emission of the source is similar to the most active flare stars with the "quiescent" optical spectrum showing strong Hα, Ca II H & K, and Mg II h & k emission. A strong Li I 6707.8A absorption line is also present in the spectrum. We have estimated a Li abundance of log N(Li)=2.5+/-0.4. Although the high Li abundance suggests that EUVE J2056-17.1 is a young object having recently arrived on the main sequence; the high flare activity favours an interpretation where the enhanced Li is sustained by spallation reactions.
Abbott Mark J.
Christian Carol A.
Craig Nathaniel
Doyle Gerry J.
Drake Jeremy J.
No associations
LandOfFree
Optical identification of EUV sources: the secrets of EUVE J2056-17.1. 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 Optical identification of EUV sources: the secrets of EUVE J2056-17.1., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical identification of EUV sources: the secrets of EUVE J2056-17.1. will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1351231