Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.1701n&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #17.01; Bulletin of the American Astronomical Society, V
Astronomy and Astrophysics
Astronomy
Scientific paper
We present imaging observation of diffuse FUV emission lines emanating from the Gum Nebula, a large ionized region 18 degrees in radius centered around (l,b)=(258, -2). Observations covering about 50% of the Gum Nebula have been obtained with the SPEAR (FIMS) instrument, flown aboard the STSAT-1 satellite. Our understanding of this nebula and its origins is incomplete; however, past observations have shown that it has characteristics of an H II region, of a wind-blown bubble, and of an old supernova remnant. We report detection (> 2-sigma) of C IV (1550 Å) and Si II (1533 Å) emission from the Gum Nebula. Emission is detected on angular scales of 4 degrees and is localized, rather than being uniform across the Nebula. The C IV emission directly traces high ionization, intermediate temperature gas, while Si II traces lower ionization gas. By comparing the observations with photoionization and shock model predictions, we determine which of these processes dominates at different locations. SPEAR (FIMS) is supported by NASA grant NAG5-5355 and flies on the STSAT-1 Mission, supported by the Korea Ministry of Science and Technology.
Han Wei
Lee Daehee
Min Kyoung
Nishikida Kaori
Ryu Kwangsun
No associations
LandOfFree
Imaging of Diffuse FUV Emission from the Gum Nebula with SPEAR 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 Imaging of Diffuse FUV Emission from the Gum Nebula with SPEAR, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Imaging of Diffuse FUV Emission from the Gum Nebula with SPEAR will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1155435