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Titolo:
Two supernova remnants of low radio surface brightness discovered in the Canadian Galactic Plane Survey
Autore:
Kothes, R; Landecker, TL; Foster, T; Leahy, DA;
Indirizzi:
Natl Res Council Canada, Herzberg Inst Astrophys, Dominion Radio AstrophysObserv, Penticton, BC V2A 6K3, Canada Natl Res Council Canada Penticton BCCanada V2A 6K3 n, BC V2A 6K3, Canada Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada Univ Alberta Edmonton AB Canada T6G 2J1 hys, Edmonton, AB T6G 2J1, Canada Univ Calgary, Dept Phys & Astron, Calgary, AB T2N 1N4, Canada Univ Calgary Calgary AB Canada T2N 1N4 stron, Calgary, AB T2N 1N4, Canada
Titolo Testata:
ASTRONOMY & ASTROPHYSICS
fascicolo: 2, volume: 376, anno: 2001,
pagine: 641 - 649
SICI:
1432-0746(200109)376:2<641:TSROLR>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
GHZ SKY SURVEY; SYNTHESIS-TELESCOPE; CONTINUUM SURVEY; ROSAT; AREA;
Keywords:
ISM : supernova remnant; ISM : individual object : G85.4+0.7; ISM : individual object : G85.q+0.6; radio continuum : ISM; X-rays : ISM; ISM : bubbles;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Kothes, R Natl Res Council Canada, Herzberg Inst Astrophys, Dominion RadioAstrophysObserv, POB 248, Penticton, BC V2A 6K3, Canada Natl Res Council Canada POB 248 Penticton BC Canada V2A 6K3 nada
Citazione:
R. Kothes et al., "Two supernova remnants of low radio surface brightness discovered in the Canadian Galactic Plane Survey", ASTRON ASTR, 376(2), 2001, pp. 641-649

Abstract

Two new supernova remnants (SNRs), G85.4+0.7 and G85.9-0.6, superimposed on the radio source W 80, have been discovered in the radio continuum data from the Canadian Galactic Plane Survey(CGPS). Both SNRs consist of a thin incomplete radio shell surrounding a weak, extended X-ray source. G85.4+0.7 has a thin non-thermal shell of diameter approximate to 0.4 degrees lying within a thermal shell whose diameter is approximate to0.6 degrees. Its radio surface brightness at 1 GHz is Sigma (1) (GHz) less than or equal to 1 x 10(-22) Watt m(-2) Hz(-1) sr(-1). It is located within a large H I bubble, whose systemic velocity, v(LSR) = -12 km s(-1), implies a distance of 3.8 kpc. Two B1 stars detected within this bubble are most likely part of the OBassociation which formed it. The diameter of the H I bubble is about 100 pc. The SNR has a diameter of about 30 pc and probably is the result of a type II explosion of an early B star approximate to 6300 years ago. G85.9-0.6has a radio surface brightness of Sigma (1) (GHz) less than or equal to 2 x 10(-22) Watt m(-2) Hz(-1) sr(-1). No H I features corresponding to the SNR have been detected. This, and the low radio and X-ray brightnesses, suggest expansion in a low-density medium. The SNR may lie in the low-density region between the local and Perseus spiral arms, at a distance of about 5 kpc. Its diameter would then be similar to 35 pc.

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Documento generato il 19/09/20 alle ore 21:11:50