The GALEX ultraviolet atlas of nearby galaxies
We present images, integrated photometry, and surface-brightness and color profiles for a total of 1034 nearby galaxies recently observed by the Galaxy Evolution Explorer (GALEX) satellite in its far-ultraviolet (FUV; λ_eff = 1516 Å) and near-ultraviolet (NUV; λ_eff = 2267 Å) bands. Our catalog of o...
| Author: | |
|---|---|
| Format: | Article |
| Publication date: | 2007 |
| Country: | España |
| Institution: | Universidad Complutense de Madrid (UCM) |
| Repository: | Docta Complutense |
| Language: | English |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/51745 |
| Online Access: | https://hdl.handle.net/20.500.14352/51745 |
| Access Level: | Open access |
| Keyword: | 52 Hubble-space-telescope Compact dwarf galaxies Star-formation history Extragalactic distance scale Campanas imaging atlas Small-magellanic-cloud Canes venatici cloud R-surface photometry Giant branch stars Evolution-explorer Astrofísica Astronomía (Física) |
| _version_ | 1878742755667083264 |
|---|---|
| author | Gil De Paz, Armando |
| author_browse | Gil De Paz, Armando |
| author_facet | Gil De Paz, Armando |
| author_role | author |
| collection | Docta Complutense |
| description | We present images, integrated photometry, and surface-brightness and color profiles for a total of 1034 nearby galaxies recently observed by the Galaxy Evolution Explorer (GALEX) satellite in its far-ultraviolet (FUV; λ_eff = 1516 Å) and near-ultraviolet (NUV; λ_eff = 2267 Å) bands. Our catalog of objects is derived primarily from the GALEX Nearby Galaxies Survey (NGS) supplemented by galaxies larger than 1' in diameter serendipitously found in these fields and in other GALEX exposures of similar of greater depth. The sample analyzed here adequately describes the distribution and full range of properties (luminosity, color, star formation rate [SFR]) of galaxies in the local universe. From the surface brightness profiles obtained we have computed asymptotic magnitudes, colors, and luminosities, along with the concentration indices C31 and C42. We have also morphologically classified the UV surface brightness profiles according to their shape. This data set has been complemented with archival optical, near-infrared, and far-infrared fluxes and colors. We find that the integrated (FUV − K) color provides robust discrimination between elliptical and spiral/irregular galaxies and also among spiral galaxies of different subtypes. Elliptical galaxies with brighter K-band luminosities (i.e., more massive) are redder in (NUV − K) color but bluer in (FUV − NUV) (a color sensitive to the presence of a strong UV upturn) than less massive ellipticals. In the case of the spiral/irregular galaxies our analysis shows the presence of a relatively tight correlation between the (FUV − NUV) color (or, equivalently, the slope of the UV spectrum, β) and the total infrared-to-UV ratio. The correlation found between (FUV − NUV) color and K-band luminosity (with lower luminosity objects being bluer than more luminous ones) can be explained as due to an increase in the dust content with galaxy luminosity. The images in this Atlas along with the profiles and integrated properties are publicly available through a dedicated Web page. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_fbadef7ea950d2dc997d7a1f39a4d17c |
| institution | Universidad Complutense de Madrid (UCM) |
| instname_str | Universidad Complutense de Madrid (UCM) |
| language | eng |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:docta.ucm.es:20.500.14352/51745 |
| publishDate | 2007 |
| publishDateSort | 2007 |
| publisher | University Chicago Press |
| publisherStr | University Chicago Press |
| reponame_str | Docta Complutense |
| spelling | The GALEX ultraviolet atlas of nearby galaxies Gil De Paz, Armando 52 Hubble-space-telescope Compact dwarf galaxies Star-formation history Extragalactic distance scale Campanas imaging atlas Small-magellanic-cloud Canes venatici cloud R-surface photometry Giant branch stars Evolution-explorer Astrofísica Astronomía (Física) We present images, integrated photometry, and surface-brightness and color profiles for a total of 1034 nearby galaxies recently observed by the Galaxy Evolution Explorer (GALEX) satellite in its far-ultraviolet (FUV; λ_eff = 1516 Å) and near-ultraviolet (NUV; λ_eff = 2267 Å) bands. Our catalog of objects is derived primarily from the GALEX Nearby Galaxies Survey (NGS) supplemented by galaxies larger than 1' in diameter serendipitously found in these fields and in other GALEX exposures of similar of greater depth. The sample analyzed here adequately describes the distribution and full range of properties (luminosity, color, star formation rate [SFR]) of galaxies in the local universe. From the surface brightness profiles obtained we have computed asymptotic magnitudes, colors, and luminosities, along with the concentration indices C31 and C42. We have also morphologically classified the UV surface brightness profiles according to their shape. This data set has been complemented with archival optical, near-infrared, and far-infrared fluxes and colors. We find that the integrated (FUV − K) color provides robust discrimination between elliptical and spiral/irregular galaxies and also among spiral galaxies of different subtypes. Elliptical galaxies with brighter K-band luminosities (i.e., more massive) are redder in (NUV − K) color but bluer in (FUV − NUV) (a color sensitive to the presence of a strong UV upturn) than less massive ellipticals. In the case of the spiral/irregular galaxies our analysis shows the presence of a relatively tight correlation between the (FUV − NUV) color (or, equivalently, the slope of the UV spectrum, β) and the total infrared-to-UV ratio. The correlation found between (FUV − NUV) color and K-band luminosity (with lower luminosity objects being bluer than more luminous ones) can be explained as due to an increase in the dust content with galaxy luminosity. The images in this Atlas along with the profiles and integrated properties are publicly available through a dedicated Web page. University Chicago Press https://hdl.handle.net/20.500.14352/51745 |
| spellingShingle | The GALEX ultraviolet atlas of nearby galaxies Gil De Paz, Armando 52 Hubble-space-telescope Compact dwarf galaxies Star-formation history Extragalactic distance scale Campanas imaging atlas Small-magellanic-cloud Canes venatici cloud R-surface photometry Giant branch stars Evolution-explorer Astrofísica Astronomía (Física) |
| title | The GALEX ultraviolet atlas of nearby galaxies |
| title_full | The GALEX ultraviolet atlas of nearby galaxies |
| title_fullStr | The GALEX ultraviolet atlas of nearby galaxies |
| title_full_unstemmed | The GALEX ultraviolet atlas of nearby galaxies |
| title_short | The GALEX ultraviolet atlas of nearby galaxies |
| title_sort | The GALEX ultraviolet atlas of nearby galaxies |
| topic | 52 Hubble-space-telescope Compact dwarf galaxies Star-formation history Extragalactic distance scale Campanas imaging atlas Small-magellanic-cloud Canes venatici cloud R-surface photometry Giant branch stars Evolution-explorer Astrofísica Astronomía (Física) |
| topic_facet | 52 Hubble-space-telescope Compact dwarf galaxies Star-formation history Extragalactic distance scale Campanas imaging atlas Small-magellanic-cloud Canes venatici cloud R-surface photometry Giant branch stars Evolution-explorer Astrofísica Astronomía (Física) |
| url | https://hdl.handle.net/20.500.14352/51745 |