The Central X‐Ray Point Source in Cassiopeia A
نویسندگان
چکیده
منابع مشابه
The Central X-ray Point Source in Cassiopeia A
The spectacular “first light” observation by the Chandra X-Ray Observatory revealed an Xray point source near the center of the 300 yr old Cas A supernova remnant. We present an analysis of the public X-ray spectral and timing data. No coherent pulsations were detected in the Chandra/HRC data. The 3σ upper limit on the pulsed fraction is <35% for P > 20 ms. The Chandra/ACIS spectrum of the poin...
متن کاملImpacts of the Detection of Cassiopeia A Point Source.
Very recently the Chandra first light observation discovered a point-like source in the Cassiopeia A supernova remnant. This detection was subsequently confirmed by the analyses of the archival data from both ROSAT and Einstein observations. Here we compare the results from these observations with the scenarios involving both black holes (BHs) and neutron stars (NSs). If this point source is a ...
متن کاملImpacts of Detection of a Point Source in Cassiopeia A
Very recently a point-like source was detected near the center of Cassiopeia A supernova remnant by the Chandra first light observation and subsequently confirmed by a long ROSAT observation. We argue that this detection can potentially provide enormous impacts on the theories of supernova explosion, progenitor scenario, compact remnant formation, accretion to compact objects, and neutron star ...
متن کاملNear-infrared and Optical Limits for the Central X-ray Point Source in the Cassiopeia a Supernova Remnant
We set new near-infrared and optical magnitude limits for the central X-ray point source (XPS) in the Cassiopeia A supernova remnant based on HST images. Near-infrared images of the center of Cas A taken with the NICMOS 2 camera in combination with the F110W and F160W filters (∼ J and H bands) have magnitude limits ≥26.2 and ≥24.6, respectively. These images reveal no sources within a 1. 2 radi...
متن کاملUpper Limits on Periodic, Pulsed Radio Emission from the X-ray Point Source in Cassiopeia A
The Chandra X-ray Observatory recently discovered an X-ray point source near the center of Cassiopeia A, the youngest known Galactic supernova remnant. We have conducted a sensitive search for radio pulsations from this source with the Very Large Array, taking advantage of the high angular resolution of the array to resolve out the emission from the remnant itself. No convincing signatures of a...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2001
ISSN: 0004-637X,1538-4357
DOI: 10.1086/318994