Abstract
We have studied the correlation between 2357 Chandra X-ray point sources in a 40 × 40 pc field and ∼20,000 infrared sources we observed in the corresponding subset of our 2° × 1.4° Spitzer/IRAC Galactic Center Survey at 3.6-8.0 μm, using various spatial and X-ray hardness thresholds. The correlation was determined for source separations of less than 0.5″, 1″, or 2″. Only the soft X-ray sources show any correlation with infrared point sources on these scales, and that correlation is very weak. The upper limit on hard X-ray sources that have infrared counterparts is < 1.7% (3 σ). However, because of the confusion limit of the IR catalog, we only detect IR sources with absolute magnitudes ≲1. As a result, a stronger correlation with fainter sources cannot be ruled out. Only one compact IR source, IRS 13, coincides with any of the dozen prominent X-ray emission features in the 3 × 3 pc region centered on Sgr A*, and the diffuse X-ray and IR emission around Sgr A* seems to be anticorrelated on a few-arcsecond scale. We compare our results with previous identifications of near-infrared companions to Chandra X-ray sources.
Original language | English (US) |
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Pages (from-to) | 958-970 |
Number of pages | 13 |
Journal | Astrophysical Journal |
Volume | 685 |
Issue number | 2 |
DOIs | |
State | Published - Oct 1 2008 |
Keywords
- Galaxy: center
- Infrared: stars
- X-rays: binaries
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science
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Spitzer and Chandra sources in galactic center
Arendt, R. G. (Creator), Gezari, D. Y. (Creator), Stolovy, S. R. (Creator), Sellgren, K. (Creator), Smith, R. (Creator), Ramirez, S. V. (Contributor), Yusef-Zadeh, F. (Creator), Law, C. J. (Creator), Smith, H. A. (Creator), Cotera, A. S. (Creator) & Moseley, S. H. (Creator), Centre de Donnees Strasbourg (CDS), 2010
DOI: 10.26093/cds/vizier.16850958, https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/685/958
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