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Chandra Monitoring Observation of the Antennae Galaxies: The X-Ray Source Populations and the Shape of their Luminosity Function

Published online by Cambridge University Press:  22 February 2018

A. Zezas ,
G. Fabbiano ,
A. Baldi ,
A. R. King ,
T. J. Ponman ,
J. C. Raymond  and
F. Schweizer
A. Zezas
Affiliation:
Harvard-Smithsonian Center for Astrophysics
G. Fabbiano
Affiliation:
Harvard-Smithsonian Center for Astrophysics
A. Baldi
Affiliation:
Harvard-Smithsonian Center for Astrophysics
A. R. King
Affiliation:
University of Leicester, U.K.
T. J. Ponman
Affiliation:
University of Birmingham, U.K.
J. C. Raymond
Affiliation:
Harvard-Smithsonian Center for Astrophysics
F. Schweizer
Affiliation:
Carnegie Observatories

Abstract

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We present the X-ray luminosity function (XLF) of the Antennae galaxies based on 8 observation performed with Chandra. We detect between 37 and 49 sources in each observation. After combining all observations we detect a total of 120 sources down to a limiting luminosity of ~ 2 x 1037 erg s–1. Comparison between the XLFs of the individual observations shows that they are not affected by source variability. The cumulative XLF of the coadded observations is well represented by a single power-law with a slope of ~ –0.5.

Resumen

Resumen

Presentamos la función de luminosidad en rayos-X (XLF) de las galaxias de La Antena, basada en 8 observaciones llevadas a cabo con Chandra. Detectamos entre 37 y 49 fuentes en cada observación. Después de combinar todas las observaciones detectamos un total de 120 fuentes por debajo de una luminosidad límite de ~ 2 x 1037 erg s–1. La comparación entre las XLFs de las observaciones individuales muestra que no están afectadas por la variabilidad de la fuente. La XFL acumulativa de las observaciones añadidas está bien representada por una ley de potencias con una pendiente ~ –0.5.

Keywords

GalaxiesAntennae (NGC 4038/39) — X-RaysBinaries — X-RaysGalaxies
Type
The Contributed Papers
Information
International Astronomical Union Colloquium , Volume 194: Compact binaries in the galaxy and beyond , 2004 , pp. 53 - 54
Copyright
Copyright © Instituto de astronomia/revista mexicana de astronomίa y astrofίsica 2004

References

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