Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999pasj...51....1n&link_type=abstract
Publications of the Astronomical Society of Japan, v.51, p.1-12.
Astronomy and Astrophysics
Astronomy
10
Clusters: Associations, Clusters: Individual (Orion Ob1B), Stars: Pre-Main-Sequence, Stars: X-Rays, X-Rays: Sources
Scientific paper
We report on the broad-band X-ray images and spectra for the Orion OB1b association obtained with ASCA. More than forty X-ray sources were detected in three fields, and about half of them have likely optical counterparts in the Guide Star Catalog. Their temperature and X-ray luminosities at the assumed distance of 450 pc are 4 keV and 1 x 10^{{30}} --1 x 10^{{31}} erg s^{{-1}} in the total energy band (0.5--10 keV), respectively. In one field covering the Horsehead Nebula and NGC 2023, several X-ray sources were identified with known candidates for low-mass pre--main-sequence stars, including V615 Ori. Among them, four sources are emission-line stars with X-ray emission. Some X-ray sources were also found in the chain of small reflection nebulosities illuminated by OB association members near to epsilon Ori. The X-ray emission from sources having optical counterparts is consistent with thin thermal plasma of temperatures of 1--2 keV. X-ray emission from possible extragalactic sources is also reported.
Kogure Tomokazu
Nakano Makoto
Ogura Katsuo
Sugitani Koji
Yamauchi Shigeo
No associations
LandOfFree
X-Ray Observations of the Orion OB1b Association 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 X-Ray Observations of the Orion OB1b Association, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-Ray Observations of the Orion OB1b Association will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-948977