Hard X-ray emissions from star forming regions

Details Hard X-ray emissions from star forming regions Hard X-ray emissions from star forming regions

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aipc..393..175t&link_type=abstract

The seventh astrophysical conference: Star formation, near and far. AIP Conference Proceedings, Volume 393, pp. 175-178 (1997).

Other

Molecular Clouds, H2 Clouds, Dense Clouds, And Dark Clouds, Star Formation, X-Ray, Pre-Main Sequence Objects, Young Stellar Objects And Protostars

Scientific paper

ASCA is the first satellite which has an imaging capability in high energies up to 10 keV, hence can peer deeply into the molecular cloud where protostar candidates may reside. We have carried out a systematic survey of hard X-rays from the core of molecular clouds, and discovered hard X-rays from protostar candidates (Class I objects) in the core of Rho Oph dark cloud. Two of them showed clear time variability; one (EL29) is flare-like and the other (WL6) is sinusoidal flux variation. On the other hand, in Taurus dark cloud, we have detected a giant flare of a weak-lined TTS, V773 Tau in hard X-ray band. The plasma temperature was extremely high, about 8 keV, at the maximum flux, then it decreased as the flux decreased. The decay time and estimated electron density were found to be comparable to those of the sun, but the geometrical flare size was equal or even larger than the stellar size. The absorption column during the flare was large, about 3.6×1022 H cm-3, and it makes impossible to detect the flare in soft X-ray band. Interestingly, in the decay phase, we found the apparent change of the metal abundance.

Affiliated with

Also associated with

No associations

Rating

Hard X-ray emissions from star forming regions 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 Hard X-ray emissions from star forming regions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hard X-ray emissions from star forming regions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1773359