Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2010-08-05
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
9 page, 8 figures, accepted for publication in MNRAS
Scientific paper
We use WIRC, IR images of the Antennae (NGC 4038/4039) together with the extensive catalogue of 120 X-ray point sources (Zezas et al. 2006) to search for counterpart candidates. Using our proven frame-tie technique, we find 38 X-ray sources with IR counterparts, almost doubling the number of IR counterparts to X-ray sources first identified in Clark et al. (2007). In our photometric analysis, we consider the 35 IR counterparts that are confirmed star clusters. We show that the clusters with X-ray sources tend to be brighter, K_s ~16 mag, with (J-K_s) = 1.1 mag. We then use archival HST images of the Antennae to search for optical counterparts to the X-ray point sources. We employ our previous IR-to-X-ray frame-tie as an intermediary to establish a precise optical-to-X-ray frame-tie with <0.6 arcsec rms positional uncertainty. Due to the high optical source density near the X-ray sources, we determine that we cannot reliably identify counterparts. Comparing the HST positions to the 35 identified IR star cluster counterparts, we find optical matches for 27 of these sources. Using Bruzual-Charlot spectral evolutionary models, we find that most clusters associated with an X-ray source are massive, ~10^6 M_sun, young, ~10^6 yr, with moderate metallicities, Z=0.05.
Barry Joseph D.
Brandl Bernhard R.
Carson John C.
Clark David M.
Colbert Edward J. M.
No associations
LandOfFree
Multiwavelength Study of Chandra X-Ray Sources in the Antennae does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Multiwavelength Study of Chandra X-Ray Sources in the Antennae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiwavelength Study of Chandra X-Ray Sources in the Antennae will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-229953