Other
Scientific paper
Jun 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...409l..49s&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 409, no. 2, p. L49-L52.
Other
34
B Stars, Rosat Mission, Stellar Flares, Stellar Luminosity, Stellar Radiation, Iue, Proportional Counters, X Rays
Scientific paper
A 30 ks observation with the ROSAT PSPC distributed over 39 hr shows that the putatively single, mild B2e star Lambda Eri emits at most times a soft X-ray flux at a rate and temperature consistent with other B stars. However, during the middle of our observations, this star's X-ray flux increased by a factor of 6 before returning to the basal level. This brightening, due entirely to photon energies of 0.7 keV or greater, can be fitted well to a Raymond-Smith temperature parameter of 14 MK and luminosity 4 x 10 exp 31 ergs/s; these are characteristics of giant stellar flares. With an estimated duration of about 50,000 s, this event is arguably the strongest X-ray flare yet observed. We consider several possible scenarios for the site of the flare, including several with an active cool secondary or degenerate companion. We find that IUE and optical spectra do not support a binary picture and that it is most probable that the flare site is on or related to Lambda Eri itself. This supports other evidence for violent magnetic activity on some B-type stars.
Feigelson Eric D.
Grady Carol A.
Peters Geraldine Joan
Smith Myron A.
No associations
LandOfFree
A giant X-ray flare on Lambda Eridani (B2e) 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 A giant X-ray flare on Lambda Eridani (B2e), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A giant X-ray flare on Lambda Eridani (B2e) will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1735173