On the non universality of surface density of galaxies
We studied the correlation between the central surface density of dark matter haloes and the halo core radius of galaxy and galaxy recently studied on a wide range of scales. For this aim we used the secondary infall model, that we previously published, to get the halo density profile taking into ac...
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| Дата: | 2012 |
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| Автор: | |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Головна астрономічна обсерваторія НАН України
2012
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| Назва видання: | Advances in Astronomy and Space Physics |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | On the non universality of surface density of galaxies / A. Del Popolo // Advances in Astronomy and Space Physics. — 2012. — Т. 2., вип. 1. — С. 53-55. — Бібліогр.: 12 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
oai:nasplib.isofts.kiev.ua:123456789-119154 |
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oai:nasplib.isofts.kiev.ua:123456789-1191542025-02-23T17:37:51Z On the non universality of surface density of galaxies Del Popolo, A. We studied the correlation between the central surface density of dark matter haloes and the halo core radius of galaxy and galaxy recently studied on a wide range of scales. For this aim we used the secondary infall model, that we previously published, to get the halo density profile taking into account the effect of ordered and random angular momentum, dynamical friction, and adiabatic contraction of the dark matter due to the baryons collapse. We found that the column density within the halo characteristic radius r ͙ is not a universal quantity as claimed by other authors, but it correlates with the halo mass M₂₀₀. The scatter in the slope of the S − M relation is 0.16 ± 0.05, leaving small room for the possibility of a constant surface density. 2012 Article On the non universality of surface density of galaxies / A. Del Popolo // Advances in Astronomy and Space Physics. — 2012. — Т. 2., вип. 1. — С. 53-55. — Бібліогр.: 12 назв. — англ. 2227-1481 https://nasplib.isofts.kiev.ua/handle/123456789/119154 en Advances in Astronomy and Space Physics application/pdf Головна астрономічна обсерваторія НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| description |
We studied the correlation between the central surface density of dark matter haloes and the halo core radius of galaxy and galaxy recently studied on a wide range of scales. For this aim we used the secondary infall model, that we previously published, to get the halo density profile taking into account the effect of ordered and random angular momentum, dynamical friction, and adiabatic contraction of the dark matter due to the baryons collapse. We found that the column density within the halo characteristic radius r ͙ is not a universal quantity as claimed by other authors, but it correlates with the halo mass M₂₀₀. The scatter in the slope of the S − M relation is 0.16 ± 0.05, leaving small room for the possibility of a constant surface density. |
| format |
Article |
| author |
Del Popolo, A. |
| spellingShingle |
Del Popolo, A. On the non universality of surface density of galaxies Advances in Astronomy and Space Physics |
| author_facet |
Del Popolo, A. |
| author_sort |
Del Popolo, A. |
| title |
On the non universality of surface density of galaxies |
| title_short |
On the non universality of surface density of galaxies |
| title_full |
On the non universality of surface density of galaxies |
| title_fullStr |
On the non universality of surface density of galaxies |
| title_full_unstemmed |
On the non universality of surface density of galaxies |
| title_sort |
on the non universality of surface density of galaxies |
| publisher |
Головна астрономічна обсерваторія НАН України |
| publishDate |
2012 |
| citation_txt |
On the non universality of surface density of galaxies / A. Del Popolo // Advances in Astronomy and Space Physics. — 2012. — Т. 2., вип. 1. — С. 53-55. — Бібліогр.: 12 назв. — англ. |
| series |
Advances in Astronomy and Space Physics |
| work_keys_str_mv |
AT delpopoloa onthenonuniversalityofsurfacedensityofgalaxies |
| first_indexed |
2025-07-22T04:23:34Z |
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2025-07-22T04:23:34Z |
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1838319628744392704 |