A population of isolated hard X-ray sources near the supernova remnant Kes 69
arXiv:1204.3470 · doi:10.1051/0004-6361/201219005
Abstract
Recent X-ray observations of the supernova remnant IC443 interacting with molecular clouds have shown the presence of a new population of hard X-ray sources related to the remnant itself, which has been interpreted in terms of fast ejecta fragment propagating inside the dense environment. Prompted by these studies, we have obtained a deep {\sl XMM-Newton} observation of the supernova remnant (SNR) Kes 69, which also shows signs of shock-cloud interaction. We report on the detection of 18 hard X-ray sources in the field of Kes 69, a significant excess of the expected galactic source population in the field, spatially correlated with CO emission from the cloud in the remnant environment. The spectra of 3 of the 18 sources can be described as hard power laws with photon index <2 plus line emission associated to K-shell transitions. We discuss the two most promising scenarios for the interpretation of the sources, namely fast ejecta fragments (as in IC443) and cataclysmic variables. While most of the observational evidences are consistent with the former interpretation, we cannot rule out the latter.
arXiv comment9 pages, 5 figures, A&A in press
References in corpus (31)
- The European Photon Imaging Camera on XMM-Newton: The MOS Cameras
- The USNO-B Catalog
- ISGRI: the INTEGRAL Soft Gamma-Ray Imager
- Bright X-ray flares in Orion young stars from COUP: evidence for star-disk magnetic fields?
- A Spitzer Space Telescope Infrared Survey of Supernova Remnants in the Inner Galaxy
- Observation of Supernova Remnant IC443 with the Fermi Large Area Telescope
- Discrete sources as the origin of the Galactic X-ray ridge emission
- A Catalog of X-ray Point Sources from Two Megaseconds of Chandra Observations of the Galactic Center
- Discovery of VHE Gamma Radiation from IC443 with the MAGIC Telescope
- INTEGRAL/IBIS all-sky survey in hard X-rays
- X-ray luminosity function of faint point sources in the Milky Way
- On the Determination of Ejecta Structure and Explosion Asymmetry from the X-ray Knots of Cassiopeia A
- Nucleosynthesis in Two-Dimensional Delayed Detonation Models of Type Ia Supernova Explosions
- Measuring Cluster Temperature Profiles with XMM/EPIC
- Cavity of Molecular Gas Associated with Supernova Remnant 3C 397
- OH (1720 MHz) Masers and Mixed-Morphology Supernova Remnants
- Resonant Absorption in the AGN spectra emerging from photoionized gas: differences between steep and flat ionizing continua
- INTEGRAL/IBIS 7-year All-Sky Hard X-Ray Survey. Part II: Catalog of Sources
- X-ray source populations in the Galactic Plane
- The Distances of SNRs Kes 69 and G21.5-0.9 from HI and 13CO Spectra
- Spitzer Observations of Molecular Hydrogen in Interacting Supernova Remnants
- X-ray Line Emission from Supernova Ejecta Fragments
- Discovery of Molecular Shells Associated with Supernova Remnants. I. Kesteven 69
- The X-ray source content of the XMM-Newton Galactic Plane Survey
- XMM-Newton study of hard X-ray sources in IC443
- Isolated X-ray -- infrared sources in the region of interaction of the supernova remnant IC 443 with a molecular cloud
- Faint Hard X-ray Sources in the Galactic Center Region: Supernova Ejecta Fragments Population
- Hard Extended X-ray Source in the IC 443 SNR Resolved by Chandra: A Fast Ejecta Fragment or a New Pulsar Wind Nebula?
- Spitzer Space Telescope Observations of the Magnetic Cataclysmic Variable AE Aqr
- Resonant Auger Destruction and Iron K-Alpha Spectra in Compact X-ray Sources
- Transient Extremely Soft X-ray Emission from the Unusually Bright CV in the Globular Cluster M3: a New CV X-ray Luminosity Record?
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- The gas-to-extinction ratio and the gas distribution in the Galaxy
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- Supernova Remnants Interacting with Molecular Clouds: X-ray and Gamma-ray Signatures
- Evidence for a neutral iron line generated by MeV protons from supernova remnants interacting with molecular clouds
- The Metal-enriched Thermal Composite Supernova Remnant Kesteven 41 (G337.8-0.1) in a Molecular Environment
- NuSTAR Detection of a Hard X-ray Source in the Supernova Remnant - Molecular Cloud Interaction Site of IC 443
- Detection of X-ray periodicity from a new eclipsing polar candidate XGPS-I J183251-100106
- A Suzaku X-ray study of the mixed-morphology supernova remnant Kes 69 and searching for its gamma-ray counterpart