DISCOVERY OF X-RAY EMISSION FROM AND DISTANCE TO THE SUPERNOVA REMNANT G84.2-0.8

Journal Article · Tue Nov 20 00:00:00 EST 2012 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/760/1/25· OSTI ID:22086354

Leahy, Denis A

We analyze X-ray and radio observations of the supernova remnant G84.2-0.8. 1420 MHz atomic hydrogen (H I) line and radio continuum data yield H I absorption spectra and a new H I absorption distance of 5.8-6.2 kpc. Archival X-ray observations from ROSAT and Chandra which cover the area including G84.2-0.8 are analyzed to show extended X-ray emission from G84.2-0.8. Fits to X-ray spectra from Chandra, with the new H I distance of 5.8-6.2 kpc, are used to determine the Sedov parameters of the supernova remnant. G84.2-0.8 is large (16-18 pc radius), middle aged ({approx}9000 yr), expanding in low-density interstellar medium (0.02 cm{sup -3}), and consistent with a low explosion energy (0.8-6.5 Multiplication-Sign 10{sup 50} erg).

• OSTI ID: 22086354
• Journal Information: Astrophysical Journal, Vol. 760, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ABSORPTION SPECTRA
ASTROPHYSICS
COSMIC X-RAY SOURCES
DENSITY
DISTANCE
GAMMA ASTRONOMY
HYDROGEN
INTERSTELLAR SPACE
MHZ RANGE
PHOTON EMISSION
RADIOASTRONOMY
SUPERNOVA REMNANTS
X RADIATION
X-RAY SPECTRA