Loading...
Please wait, while we are loading the content...
Similar Documents
Stellar populations of lyman break galaxies at z approx. to 1-3 in the hst/wfc3 early release science observations
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Cohen, S. H. Ryan Jr., R. E. O'Connell, R. W. Saha, A. Hall, D. N. B. Holtzman, J. A. Rutkowski, M. J. Yan, H. Straughn, A. N. Balick, B. Disney, M. J. Finkelstein, S. L. Bond, H. E. Kimble, R. A. Young, E. T. McCarthy, P. J. Tauger, J. T. Silk, J. I. Paresce, F. Dopita, M. A. Hathi, N. P. Windhorst, R. A. Calzetti, D. Koekemoer, A. M. Frogel, Jay A. |
| Copyright Year | 2012 |
| Description | We analyze the spectral energy distributions (SEDs) of Lyman break galaxies . (LBGs) at z approx = 1-3 selected using the Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) UVIS channel filters. These HST /WFC3 obse,rvations cover about 50 arcmin2 in the GOODS-South field as a part of the WFC3 Early Release Science program. These LBGs at z approx = 1-3 are selected using dropout selection criteria similar to high redshift LBGs. The deep multi-band photometry in this field is used to identify best-fit SED models, from which we infer the following results: (1) the photometric redshift estimate of these dropout selected LBGs is accurate to within few percent; (2) the UV spectral slope f3 is redder than at high redshift (z > 3), where LBGs are less dusty; (3) on average, LBGs at .z approx = 1-3 are massive, dustier and more highly star-forming, compared to LBGs at higher redshifts with similar luminosities, though their median values are similar within 1a uncertainties. This could imply that identical dropout selection technique, at all. redshifts, find physically similar galaxies; and (4) the stellar masses of these LBGs are directly proportional to their UV luminosities with a logarithmic slope of approx 0.46, and star-formation rates are proportional to their stellar masses with a logarithmic slope of approx 0.90. These relations hold true - within luminosities probed in this study - for LBGs from z approx = 1.5 to 5. The star-forming galaxies selected using other color-based techniques show similar correlations at z approx = 2, but to avoid any selection biases, and for direct comparison with LBGs at z > 3, a true Lyman break selection at z approx = 2 is essential. The future HST UV surveys,. both wider and deeper, covering a large luminosity range are important to better understand LBG properties, and their evolution. |
| File Size | 7550337 |
| Page Count | 29 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20120014325 |
| Archival Resource Key | ark:/13960/t6xw9dp5j |
| Language | English |
| Publisher Date | 2012-01-01 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Red Shift Stellar Mass Starburst Galaxies Spaceborne Astronomy Spectral Energy Distribution Luminosity Hubble Space Telescope Ultraviolet Astronomy Photometry Star Formation Rate Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
