SIMBAD references

2002ApJS..142..239Z - Astrophys. J., Suppl. Ser., 142, 239-260 (2002/October-0)

Chandra observations of "The Antennae" galaxies (NGC 4038/4039). II. Detection and analysis of galaxian X-ray sources.


Abstract (from CDS):

We report the detailed analysis of the X-ray properties of the discrete sources detected in a long (72 ks) Chandra ACIS-S observation of the Antennae galaxies. We detect 49 sources, down to a detection limit of ∼1038 ergs.s–1; 18 sources have LX>1039 ergs.s–1 (ultraluminous X-ray sources; ULXs). Six of the 49 sources have an extended component. Two sources show evidence for variability during this observation, and three sources exhibit long-term variability in timescales of a few years. The spectra of the discrete sources are diverse, suggesting different emission mechanisms, broadly correlated with the source luminosity: the most luminous sources exhibit harder emission, while the spectra of fainter sources appear softer. Spectra and variability suggest that the ULXs may be binary accretion sources; Supernova remnants or hot interstellar medium in the Chandra beam may be responsible for some of the softer sources.

Abstract Copyright:

Journal keyword(s): Galaxies: Individual: NGC Number: NGC 4038/4039 - Galaxies: Interactions - Galaxies: Peculiar - X-Rays: Galaxies

Nomenclature: Table 1, col(1): [ZFR2002] NN (Nos 1-49), [ZFR2002] Nc (Nos 1c-3c) = Table 1, col(2): CXOAnt JHHMMSS.s+DDMMSS.s N=52.

Simbad objects: 55

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