Saved in:
| Main Author: | |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad Nacional Autónoma de México
2008
|
| Subjects: | |
| Online Access: | https://www.redalyc.org/articulo.oa?id=57116170021 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866814372998807552 |
|---|---|
| author | B. Cervantes-Sodi |
| author_facet | B. Cervantes-Sodi |
| contents | ENVIRONMENT AND MASS DEPENDENCIES OF GALACTIC A SPIN PARAMETER: COSMOLOGICAL SIMULATIONS AND SDSS GALAXIES COMPARED B. Cervantes-Sodi X. Hernández Ch. Park J. Kim Física, Astronomía y Matemáticas galaxies: formation galaxies: formation galaxies: structure galaxies: structure galaxies: statistics We use a sample of galaxies from the Sloan Digital Sky Survey (SDSS) to search for correlations between the ¿ spin parameter and the environment and mass of galaxies. In order to calculate the totalvalue of ¿ for each observed galaxy, we employ a simple model of the dynamical structure of the galaxies which allows a rough estimate of the value of ¿ using only readily obtainable observables from the luminous galaxies. Use of a large volume limited sample (upwards of 11,000) allows reliable inferences of mean values and dispersions of ¿ distributions. We find, in agreement with some N-body cosmological simulations, no significant dependence of ¿ on the environmental density of the galaxies. For the case of mass, our results show a marked correlation with ¿, in the sense that low mass galaxies present both higher mean values of ¿ and associated dispersions, than high mass galaxies. This last direct empirical result, at odds with expectations from N-body cosmological simulations, provides an interesting constraint on the mechanisms of galaxy formation and acquisition of angular momentum, a valuable test for cosmological models. 2008 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57116170021 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Vol.34 |
| format | Artículo científico |
| id | redalyc_57116170021 |
| language | en |
| publishDate | 2008 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | ENVIRONMENT AND MASS DEPENDENCIES OF GALACTIC A SPIN PARAMETER: COSMOLOGICAL SIMULATIONS AND SDSS GALAXIES COMPARED B. Cervantes-Sodi Física, Astronomía y Matemáticas galaxies: formation galaxies: formation galaxies: structure galaxies: structure galaxies: statistics ENVIRONMENT AND MASS DEPENDENCIES OF GALACTIC A SPIN PARAMETER: COSMOLOGICAL SIMULATIONS AND SDSS GALAXIES COMPARED B. Cervantes-Sodi X. Hernández Ch. Park J. Kim Física, Astronomía y Matemáticas galaxies: formation galaxies: formation galaxies: structure galaxies: structure galaxies: statistics We use a sample of galaxies from the Sloan Digital Sky Survey (SDSS) to search for correlations between the ¿ spin parameter and the environment and mass of galaxies. In order to calculate the totalvalue of ¿ for each observed galaxy, we employ a simple model of the dynamical structure of the galaxies which allows a rough estimate of the value of ¿ using only readily obtainable observables from the luminous galaxies. Use of a large volume limited sample (upwards of 11,000) allows reliable inferences of mean values and dispersions of ¿ distributions. We find, in agreement with some N-body cosmological simulations, no significant dependence of ¿ on the environmental density of the galaxies. For the case of mass, our results show a marked correlation with ¿, in the sense that low mass galaxies present both higher mean values of ¿ and associated dispersions, than high mass galaxies. This last direct empirical result, at odds with expectations from N-body cosmological simulations, provides an interesting constraint on the mechanisms of galaxy formation and acquisition of angular momentum, a valuable test for cosmological models. 2008 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57116170021 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Vol.34 |
| title | ENVIRONMENT AND MASS DEPENDENCIES OF GALACTIC A SPIN PARAMETER: COSMOLOGICAL SIMULATIONS AND SDSS GALAXIES COMPARED |
| topic | Física, Astronomía y Matemáticas galaxies: formation galaxies: formation galaxies: structure galaxies: structure galaxies: statistics |
| url | https://www.redalyc.org/articulo.oa?id=57116170021 |