G0. 9 + 0. 1 and the emerging class of composite supernova remnants

Journal Article · Sun Mar 01 04:00:00 EST 1987 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/165050· OSTI ID:6270210

Helfand, D J; Becker, R H

High-resolution, multifrequency maps of a bright extended radio source near the Galactic center have revealed it to be a classic example of a composite supernova remnant. A steep-spectrum shell of emission, about 8 arcmin in diameter, surrounds a flat-spectrum, highly polarized Crab-like core about 2 arcmin across. The two components have equal flux densities at about 6 cm, marking this source as having the highest core-to-shell ratio among the about 10 composite remnants identified to date. X-ray and far-infrared data on the source are used to constrain the energetics and evolutionary state of the remnant and its putative central pulsar. It is argued that the total energy contained in the Crab-like components requires that the pulsars powering them were all born with periods shorter than 50 ms, and that if a substantial number of neutron stars with slow initial rotation rates exist, their birthplaces have not yet been found. 58 references.

• Research Organization: Columbia Univ., NY; California Univ., Davis
• OSTI ID: 6270210
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 314; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
640105 -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
FAR INFRARED RADIATION
FLUX DENSITY
GALAXIES
GALAXY NUCLEI
INFRARED RADIATION
IONIZING RADIATIONS
MILKY WAY
NEBULAE
NEUTRON STARS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
POLARIMETRY
PULSARS
RADIANT FLUX DENSITY
RADIATIONS
STAR EVOLUTION
STARS
SUPERNOVA REMNANTS
X RADIATION