The radial variation of the silicate-to-carbon ratio in M31 probed by PRIMA
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| Autores principales: | , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866912566380331008 |
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| author | Chastenet, Jérémy De Looze, Ilse Baes, Maarten Bianchi, Simone Casasola, Viviana Ciesla, Laure Eales, Stephen Fritz, Jacopo Galliano, Frédéric Madden, Suzanne C. Nersesian, Angelos Relaño, Monica Smith, Matthew W. L. van der Giessen, Stefan Xilouris, Emmanuel |
| author_facet | Chastenet, Jérémy De Looze, Ilse Baes, Maarten Bianchi, Simone Casasola, Viviana Ciesla, Laure Eales, Stephen Fritz, Jacopo Galliano, Frédéric Madden, Suzanne C. Nersesian, Angelos Relaño, Monica Smith, Matthew W. L. van der Giessen, Stefan Xilouris, Emmanuel |
| contents | The properties of interstellar dust grains are being scrutinized more than ever before, with the advent of large facilities. Infrared emission from dust grains is a powerful asset than can help constrain their physical and chemical properties. Among these, the relative ratio of carbon-rich to silicate-rich grains remains one that has not yet been investigated thoroughly, due to the lack of dedicated instruments and modeling limitations. In this paper, we quantify the modeling degeneracies inherent to constraining the far-infrared (far-IR) slope of the dust emission spectral energy distribution. Used as a proxy for the silicate-to-carbon ratio, we find that recovering the far-IR slope is affected by the estimate of the local radiation field, and the input abundances of different grain species. We show that PRIMA's Hyperspectral Imaging will lead to better constrained local radiation fields which will aid -- together with PRIMA's polarization capabilities -- to better constrain the silicate-to-carbon ratio in M31, and how it spatially varies within the galaxy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_01990 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The radial variation of the silicate-to-carbon ratio in M31 probed by PRIMA Chastenet, Jérémy De Looze, Ilse Baes, Maarten Bianchi, Simone Casasola, Viviana Ciesla, Laure Eales, Stephen Fritz, Jacopo Galliano, Frédéric Madden, Suzanne C. Nersesian, Angelos Relaño, Monica Smith, Matthew W. L. van der Giessen, Stefan Xilouris, Emmanuel Astrophysics of Galaxies The properties of interstellar dust grains are being scrutinized more than ever before, with the advent of large facilities. Infrared emission from dust grains is a powerful asset than can help constrain their physical and chemical properties. Among these, the relative ratio of carbon-rich to silicate-rich grains remains one that has not yet been investigated thoroughly, due to the lack of dedicated instruments and modeling limitations. In this paper, we quantify the modeling degeneracies inherent to constraining the far-infrared (far-IR) slope of the dust emission spectral energy distribution. Used as a proxy for the silicate-to-carbon ratio, we find that recovering the far-IR slope is affected by the estimate of the local radiation field, and the input abundances of different grain species. We show that PRIMA's Hyperspectral Imaging will lead to better constrained local radiation fields which will aid -- together with PRIMA's polarization capabilities -- to better constrain the silicate-to-carbon ratio in M31, and how it spatially varies within the galaxy. |
| title | The radial variation of the silicate-to-carbon ratio in M31 probed by PRIMA |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2509.01990 |