Planetary nebulae populations in the haloes of nearby massive early-type galaxies
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arXiv
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| Autores principales: | , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866916993859321856 |
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| author | Hartke, J. Arnaboldi, M. Gerhard, O. Ennis, A. I. Pulsoni, C. Coccato, L. Cortesi, A. Freeman, K. C. Kuijken, K. Merrifield, M. Napolitano, N. |
| author_facet | Hartke, J. Arnaboldi, M. Gerhard, O. Ennis, A. I. Pulsoni, C. Coccato, L. Cortesi, A. Freeman, K. C. Kuijken, K. Merrifield, M. Napolitano, N. |
| contents | Planetary nebulae (PNe) are excellent tracers of the metal-poor haloes of nearby early-type galaxies. They are commonly used to trace spatial distribution and kinematics of the halo and intracluster light at distances of up to 100 Mpcs. The results on the early-type galaxy M105 in the Leo I group represent a benchmark for the quantitative analysis of halo and intragroup light. Since the Leo I group lies at just a 10 Mpc distance, it is at the ideal location to compare results from resolved stellar populations with the homogeneous constraints over a much larger field of view from the PN populations. In M105, we have -- for the first time -- established a direct link between the presence of a metal-poor halo as traced by resolved red-giant branch stars and a PN population with a high specific frequency ($α$-parameter). This confirms our inferences that the high $α$-parameter PN population in the outer halo of M49 in the Virgo Cluster traces the metal-poor halo and intra-group light. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_02587 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Planetary nebulae populations in the haloes of nearby massive early-type galaxies Hartke, J. Arnaboldi, M. Gerhard, O. Ennis, A. I. Pulsoni, C. Coccato, L. Cortesi, A. Freeman, K. C. Kuijken, K. Merrifield, M. Napolitano, N. Astrophysics of Galaxies Planetary nebulae (PNe) are excellent tracers of the metal-poor haloes of nearby early-type galaxies. They are commonly used to trace spatial distribution and kinematics of the halo and intracluster light at distances of up to 100 Mpcs. The results on the early-type galaxy M105 in the Leo I group represent a benchmark for the quantitative analysis of halo and intragroup light. Since the Leo I group lies at just a 10 Mpc distance, it is at the ideal location to compare results from resolved stellar populations with the homogeneous constraints over a much larger field of view from the PN populations. In M105, we have -- for the first time -- established a direct link between the presence of a metal-poor halo as traced by resolved red-giant branch stars and a PN population with a high specific frequency ($α$-parameter). This confirms our inferences that the high $α$-parameter PN population in the outer halo of M49 in the Virgo Cluster traces the metal-poor halo and intra-group light. |
| title | Planetary nebulae populations in the haloes of nearby massive early-type galaxies |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2312.02587 |