On the building blocks of the M31 and Milky Way halos
We discuss the formation of the halo of M31 and the Milky Way as traced by the population of RR Lyrae stars, in comparison with the population of such stars preent in satellite dwarf galaxies. We find that both halos and the massive dwarf host a population of high amplitude short period RRab stars,...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2017-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://doi.org/10.1051/epjconf/201715201014 |
| _version_ | 1830102984168570880 |
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| author | Monelli Matteo |
| author_facet | Monelli Matteo |
| author_sort | Monelli Matteo |
| collection | DOAJ |
| description | We discuss the formation of the halo of M31 and the Milky Way as traced by the population of RR Lyrae stars, in comparison with the population of such stars preent in satellite dwarf galaxies. We find that both halos and the massive dwarf host a population of high amplitude short period RRab stars, absent in low-mass dwarfs. These stars are explained as the metal-rich tail of the RR Lyrae distribution ([Fe/H] ∼ - 1.5), and thus their existence imply fast chemical enrichment in the host system. Their presence in both halos implies that massive building blocks had an important role in their formation. |
| first_indexed | 2024-12-16T21:23:42Z |
| format | Article |
| id | doaj.art-df3ac2b5c2f44bf89e94e2a3269413d6 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-16T21:23:42Z |
| publishDate | 2017-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-df3ac2b5c2f44bf89e94e2a3269413d62022-12-21T22:15:49ZengEDP SciencesEPJ Web of Conferences2100-014X2017-01-011520101410.1051/epjconf/201715201014epjconf_puls2017_01014On the building blocks of the M31 and Milky Way halosMonelli MatteoWe discuss the formation of the halo of M31 and the Milky Way as traced by the population of RR Lyrae stars, in comparison with the population of such stars preent in satellite dwarf galaxies. We find that both halos and the massive dwarf host a population of high amplitude short period RRab stars, absent in low-mass dwarfs. These stars are explained as the metal-rich tail of the RR Lyrae distribution ([Fe/H] ∼ - 1.5), and thus their existence imply fast chemical enrichment in the host system. Their presence in both halos implies that massive building blocks had an important role in their formation.https://doi.org/10.1051/epjconf/201715201014 |
| spellingShingle | Monelli Matteo On the building blocks of the M31 and Milky Way halos EPJ Web of Conferences |
| title | On the building blocks of the M31 and Milky Way halos |
| title_full | On the building blocks of the M31 and Milky Way halos |
| title_fullStr | On the building blocks of the M31 and Milky Way halos |
| title_full_unstemmed | On the building blocks of the M31 and Milky Way halos |
| title_short | On the building blocks of the M31 and Milky Way halos |
| title_sort | on the building blocks of the m31 and milky way halos |
| url | https://doi.org/10.1051/epjconf/201715201014 |
| work_keys_str_mv | AT monellimatteo onthebuildingblocksofthem31andmilkywayhalos |