SPATIALLY RESOLVED STAR FORMATION IMAGE AND THE ULTRALUMINOUS X-RAY SOURCE POPULATION IN NGC 2207/IC 2163

Journal Article · Wed Jul 10 00:00:00 EDT 2013 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/771/2/133· OSTI ID:22140128

Mineo, S. ^[1]; Rappaport, S. ^[2]; Steinhorn, B. ^[3]; Levine, A. ^[4]; Gilfanov, M. ^[5]

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1. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street Cambridge, MA 02138 (United States)
2. 37-602B, M.I.T. Department of Physics and Kavli Institute for Astrophysics and Space Research, 70 Vassar Street, Cambridge, MA 02139 (United States)
3. Harvard-MIT Division of Health Sciences and Technology, Harvard Medical School, 260 Longwood Avenue, Boston, MA 02115 (United States)
4. M.I.T. Kavli Institute for Astrophysics and Space Research, Room 37-575, 70 Vassar Street, Cambridge, MA 02139 (United States)
5. Max Planck Institut fuer Astrophysik, Karl-Schwarzschild-Str. 1, D-85741 Garching (Germany)

The colliding galaxy pair NGC 2207/IC 2163, at a distance of {approx}39 Mpc, was observed with Chandra, and an analysis reveals 28 well resolved X-ray sources, including 21 ultraluminous X-ray sources (ULXs) with L{sub X} {approx}> 10{sup 39} erg s{sup -1}, as well as the nucleus of NGC 2207. The number of ULXs is comparable with the largest numbers of ULXs per unit mass in any galaxy yet reported. In this paper we report on these sources, and quantify how their locations correlate with the local star formation rates seen in spatially resolved star formation rate density images that we have constructed using combinations of GALEX FUV and Spitzer 24 {mu}m images. We show that the numbers of ULXs are strongly correlated with the local star formation rate densities surrounding the sources, but that the luminosities of these sources are not strongly correlated with star formation rate density.

• OSTI ID: 22140128
• Journal Information: Astrophysical Journal, Vol. 771, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
DENSITY
GALAXIES
GALAXY NUCLEI
IMAGES
INTERACTIONS
LUMINOSITY
MASS
NEUTRONS
STARS
X-RAY SOURCES