Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000astl...26...77l&link_type=abstract
Astronomy Letters, vol. 26, p. 77-87 (2000)
Astronomy and Astrophysics
Astronomy
8
Scientific paper
New optical and X-ray observations of the supernova remnant (SNR) G78.2+2.1 are presented. CCD H_alpha observations with a Fabry-Perot interferometer attached to the 125-cm reflector at the Crimean Station of the Sternberg Astronomical Institute are used to obtain the radial-velocity field toward the SNR and in its vicinity. The brightness distribution and X-ray spectrum of the SNR are obtained from archival ROSAT and ASCA X-ray data. The X-ray image of G78.2+2.1 exhibits a shell structure (deltaR/R = 0.3) and is generally similar to its radio image; a comparison with the radio map at 1.4 GHz constructed from archival VLA data reveals the coincidence of features on scales of several arcminutes at the eastern boundary of G78.2+2.1. Weak X-ray emission (an outer shell or a halo of size approximately equal to 2 deg) has been identified for the first time far outside G78.2+2.1. The X-ray emission from G78.2+2.1 is shown to characterize a young adiabatic SNR [M_{X-ray} = 100 M_solar, V_s = 10^3 km/s, t = (5-6) x 10^3 years], which probably expands inside the cavity swept up by the progenitor's stellar wind. Searches for the corresponding radio structure are required to elucidate the nature of the outer X-ray shell or halo.
Finoguenov A. V.
Lozinskaya Tatiana A.
Pravdikova V. V.
No associations
LandOfFree
The Supernova Remnant G78.2+2.1: New Optical and X-ray Observations 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 The Supernova Remnant G78.2+2.1: New Optical and X-ray Observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Supernova Remnant G78.2+2.1: New Optical and X-ray Observations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1492625