Expanding Ejecta in the Core-Collapse Supernova Remnant G292.0+1.8, Cas A’s Older Cousin

Details Expanding Ejecta in the Core-Collapse Supernova Remnant G292.0+1.8, Cas A’s Older Cousin Expanding Ejecta in the Core-Collapse Supernova Remnant G292.0+1.8, Cas A’s Older Cousin

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20915616t&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #156.16; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

G292.0+1.8 is an oxygen-rich supernova remnant (SNR)--a member of the same exclusive family as Cas A. It is the only Galactic SNR which displays all the features expected in the young remnant of a core-collapse supernova: optical (and X-ray) emission from fragments of metal-rich ejecta, an active pulsar and associated pulsar-wind nebula, and evidence for interaction of a blast wave with circumstellar wind material. We report here measurements of proper motions of the ejecta-dominated filaments, based on CCD images in the [O III] 5007 Å line taken from the CTIO 0.9m telescope at epochs from 1999 through 2006. We also use additional images from as early as 1986 for the central region of this 8-arcmin-diameter remnant. Matched narrow-band continuum images at most epochs aid in removing the myriad stars that litter the crowded field, making small, faint filaments of ejecta more apparent. We use a two-dimensional cross-correlation technique to measure the shifts for dozens of individual filaments between multiple epoch pairs. The fastest, most outlying filaments display proper motions as large as 0.15 arcsec/yr. Preliminary results appear consistent with undecelerated expansion from a common center, and suggest a kinematic age slightly younger than the 3000-3400 yr inferred by Ghavamian et al. (2005, ApJ, 635, 365) from Fabry-Perot measurements of the radial velocities for many of the ejecta filaments in G292.
This work is partially supported by the National Science Foundation through grant AST-0307613.

Affiliated with

Also associated with

No associations

Rating

Expanding Ejecta in the Core-Collapse Supernova Remnant G292.0+1.8, Cas A’s Older Cousin 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 Expanding Ejecta in the Core-Collapse Supernova Remnant G292.0+1.8, Cas A’s Older Cousin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Expanding Ejecta in the Core-Collapse Supernova Remnant G292.0+1.8, Cas A’s Older Cousin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1162235