Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999sf99.proc..102k&link_type=abstract
Star Formation 1999, Proceedings of Star Formation 1999, held in Nagoya, Japan, June 21 - 25, 1999, Editor: T. Nakamoto, Nobeyam
Astronomy and Astrophysics
Astronomy
Scientific paper
X-ray shadowing effects by the nearby dark clouds in our galaxy have mainly been studied by ROSAT observations in the 1/4 - 3/4 keV energy band. However, the cutoff energy of these energy bands are equivalent to Log (NH[cm-2]) of <=21 and dense core equivalent to Log (NH[cm-2])~22 can not easily identified. We have analyzed the X-ray attenuation of Cosmic X-ray Background radiation by the Lupus molecular clouds using the data obtained by the Japanese X-ray Astronomy satellite ASCA. Because of the absence of intense X-ray sources in this region, we could clearly see the X-ray extinction core in the Lupus 1 north region. The positional coincidence of X-ray shadows in the Lupus 1 north region is nearly consistent with CO cloud core, far infrared emission (IRAS 100μm) and visual extinction. The peak equivalent Log (NH[cm-2]) is estimated to be 21.5 from the X-ray intensity ratio between 0.7-1.8keV and 1.8-3.5keV energy bands, which is consistent with the value expected from the observations of C18O, IRAS 100μm and star counts (visual extinction).
Fukui Yasuo
Hara Akihiro
Kamata Yukiko
Tachihara Kengo
No associations
LandOfFree
ASCA X-Ray Shadowing in the Lupus Region 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 ASCA X-Ray Shadowing in the Lupus Region, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ASCA X-Ray Shadowing in the Lupus Region will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1061299