The X-ray binary population in M33: I. Source list and luminosity function

Abstract

In this paper we present the source list for 3 Chandra observations of the Local Group galaxy M33. The observations are centered on the nucleus and on the star forming region NGC 604. We detect a total of 261 sources in an area of \~0.2 square degree down to a flux limit of 3*10^{-16} erg/s/cm^2 which corresponds to a luminosity of ~2*10^34 erg/s at a distance of 840 kpc. From the source list we construct the luminosity functions of sources observed in M33. Taking into account background contamination the luminosity functions are consistent with those of other star forming galaxies. In addition, the combination of X-ray color analysis and the existence of ``blue'' optical counterparts strongly indicate that the X-ray point source population in M33 consists of young objects. Above 3*10^35 erg/s there are few X-ray sources in the locus of the X-ray hardness ratio diagram that is generally populated by LMXBs.

51 pages, accepted for ApJS, accepted version

References in corpus (24)

• The Chandra Deep Field-North Survey. XIII. 2 Ms Point-Source Catalogs
• High Mass X-ray Binaries as a Star Formation Rate Indicator in Distant Galaxies
• Low mass X-ray binaries as a stellar mass indicator for the host galaxy
• The Milky Way in X-rays for an outside observer: Log(N)-Log(S) and Luminosity Function of X-ray binaries from RXTE/ASM data
• M33: A Galaxy with No Supermassive Black Hole
• Giant Molecular Clouds in M33 - I. BIMA All Disk Survey
• Old and Young X-ray Point Source Populations in Nearby Galaxies
• X-ray Point Sources in The Central Region of M31 as seen by Chandra
• Chandra X-ray Observations of NGC 1316 (Fornax A)
• Chandra Multi-wavelength Project (ChaMP). I. First X-ray Source Catalog
• The spiral galaxy M33 mapped in the FIR by ISOPHOT: A spatially resolved study of the warm and cold dust
• Identifying X-ray Sources in Bulge and Disk Galaxies from X-ray Colors
• The second ROSAT PSPC survey of M31 and the complete ROSAT PSPC source list
• Chandra Multi-wavelength Project (ChaMP). II. First Results of X-ray Source Properties
• XMM-Newton survey of the Local Group galaxy M 33
• ROSAT HRI catalogue of X-ray sources in the SMC region
• A Study of the Populations of X-ray Sources in the Small Magellanic Cloud with ASCA
• Chandra Studies of the X-ray Point Source Luminosity Functions of M31
• ROSAT HRI catalogue of X-ray sources in the LMC region
• The DIRECT Project: Catalogs of Stellar Objects in Nearby Galaxies. I. The Central Part of M33
• Spectral variability of the nucleus of M33 in a Chandra-ACIS observation
• Revealing the Supernova Remnant Population of M33 with Chandra
• BeppoSAX spectroscopy of the luminous X-ray sources in M33
• High resolution Chandra X-ray imaging of the nucleus of M33

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• The Galactic Bulge Survey: outline and X-ray observations
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• Deep CFHT Photometric Survey of the Entire M33 Galaxy I: Catalogue of 36000 Variable Point Sources
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• The Long-Term Variability of the X-Ray Sources in NGC 6946 and NGC 4485/4490
• The Chandra ACIS Survey of M33 (ChASeM33): The final source catalog
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• A Deep XMM-Newton Survey of M33: Point Source Catalog, Source Detection and Characterization of Overlapping Fields
• The Chandra ACIS Survey of M33 (ChASeM33): Transient X-ray Sources Discovered in M33
• An X-ray spectral survey of the disc of M31 with XMM-Newton
• The X-ray binary population in M33: II. X-ray spectra and variability
• Search for LBV Candidates in the M33 Galaxy
• Multiwavelength Characterization of the High Mass X-ray Binary Population of M33
• Spectroscopy of the brightest optical counterparts of X-ray sources in the direction of M~31 and M~33
• XMM-Newton view of X-ray overdensities from nearby galaxy clusters: the environmental dependencies
• A Multi-epoch X-ray Study of the Spiral Galaxy NGC 7331
• Optical counterparts of ROSAT X-ray sources in two selected fields at low vs. high Galactic latitudes
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• Soft X-ray emission from the inner disk of M33
• Monitoring the X-ray Variability of Bright X-ray Sources in M33
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• M^3D: Mosaicking M33 with MUSE datacubes I. Unveiling the diversity of HII regions in M33 with MUSE