A New Young Galactic Supernova Remnant Containing a Compact Object: G15.9+0.2

Abstract

We identify the radio-emitting shell-type supernova remnant G15.9+0.2 as a relatively young remnant containing an X-ray point source that may be its associated neutron star. The integrated spectrum of the remnant shell obtained from our 30 ks exploratory Chandra observation shows very strong lines that require elevated element abundances from ejecta, in particular of sulfur. A plane-shock model fit gives a temperature $kT=0.9(0.8,1.0)$ keV, an ionization timescale $n_{e}t=6(4,9)\times 10^{10}$ cm${}^{-3}$ s, and a sulfur abundance of 2.1 (1.7, 2.7) times solar (90% confidence limits). Two-component models with one solar and one enriched component are also plausible, but are not well constrained by the data. Various estimates give a remnant age of order $10^3$ yr, which would make G15.9+0.2 among the dozen or so youngest remnants in the Galaxy. The sparse point source spectrum is consistent with either a steep $\Gamma \sim$ 4 power law or a $kT\sim$ 0.4 keV blackbody. The spectrum is absorbed by a H column density $N_H\sim 4\times 10^{22}$ cm${}^{-2}$ similar to that required for the remnant shell. The implied 2--9.5 keV source luminosity is about $10^{33}$ ergs s${}^{-1}$ for an assumed distance of 8.5 kpc consistent with the high absorption column. We suggest that the point source is either a rotation-powered pulsar or a compact central object (CCO).

4 pages, 3 figures. Accepted by ApJ Letters

References in corpus (9)

• GLIMPSE: I. A SIRTF Legacy Project to Map the Inner Galaxy
• Neutron Star Cooling
• The Wavelength Dependence of Interstellar Extinction from 1.25 to 8.0 microns Using GLIMPSE Data
• The second US Naval Observatory CCD Astrograph Catalog (UCAC2)
• The Velocity Distribution of Isolated Radio Pulsars
• Supernova Remnants in the Sedov Expansion Phase: Thermal X-Ray Emission
• The Compact Central Object in Cas A: A Neutron Star with Hot Polar Caps or a Black Hole?
• X-ray source populations in the Galactic Plane
• X-ray observations of RX J0822-4300 and Puppis-A

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