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Searching for an Intrinsic Stellar Population in Compact High-Velocity Clouds | | U. Hopp
; R.E. Schulte-Ladbeck
; J. Kerp
; | | Date: |
20 Sep 2002 | | Journal: | Astrophys.Space Sci. 284 (2003) 647-650 | | Subject: | astro-ph | | Abstract: | We are investigating the hypothesis that Compact High--Velocity Clouds (CHVCs) are the left-over building blocks of Local Group galaxies. To this end, we are searching for their embedded stellar populations using FORS at the VLT. The search is done with single-star photometry in V and I bands, which is sensitive to both, young and old, stellar populations. Five CHVCs of our sample have been observed so far down to I=24. We pointed the VLT towards the highest HI column density regions, as determined in Effelsberg radio data. In an alternate approach, we searched 2MASS public data towards those 5 CHVCs down to K=16. While the VLT data probe the central regions out to distance moduli of about 27, the 2MASS data are sensitive to a population of red giant stars to distance moduli of about 20. The 2MASS data, on the other hand, cover a much wider field of view than the VLT data (radius of 1 degree versus FORS field of 6.8 arcmin). We did not find a stellar population intrinsic to the CHVCs in either data. In this paper, we illustrate our search methods. | | Source: | arXiv, astro-ph/0209429 | | Services: | Forum | Review | PDF | Favorites | |
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