A portrait throughout perihelion of the NH$_2$-rich interstellar comet 2I/Borisov
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , , , , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2025
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866909677526188032 |
|---|---|
| author | Deam, Sophie E. Bannister, Michele T. Opitom, Cyrielle Knight, Matthew M. Ridden-Harper, Ryan Seligman, Darryl Z. Fitzsimmons, Alan Guilbert-Lepoutre, Aurélie Jehin, Emmanuel Jorda, Laurent Marsset, Michael Moulane, Youssef Rousselot, Philippe Vernazza, Pierre Yang, Bin |
| author_facet | Deam, Sophie E. Bannister, Michele T. Opitom, Cyrielle Knight, Matthew M. Ridden-Harper, Ryan Seligman, Darryl Z. Fitzsimmons, Alan Guilbert-Lepoutre, Aurélie Jehin, Emmanuel Jorda, Laurent Marsset, Michael Moulane, Youssef Rousselot, Philippe Vernazza, Pierre Yang, Bin |
| contents | The interstellar comet 2I/Borisov is the first interstellar object where compositional characterisation was possible throughout its entire perihelion passage. We report all 16 epochs of a comprehensive optical observation campaign with ESO VLT's integral field spectrograph MUSE, spanning 126 days from 2019 November 14 to 2020 March 19. The spatial dust emission of 2I/Borisov was predominantly smooth, with no seasonal effect. A jet-like feature was consistently visible. The gas production morphology of its coma was also smooth and similar for C$_2$, NH$_2$, and CN: symmetric around the photocentre. The production rates of these species gently declined into and beyond perihelion, until 2I's outburst and splitting event in early 2020 March. C$_2$, NH$_2$, and CN production rates all increased, with NH$_2$ being the most significant; the dust emission also slightly reddened. 2I/Borisov is a carbon-depleted, relatively NH$_2$-rich comet when compared to those comets yet measured in the Solar System. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_05051 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A portrait throughout perihelion of the NH$_2$-rich interstellar comet 2I/Borisov Deam, Sophie E. Bannister, Michele T. Opitom, Cyrielle Knight, Matthew M. Ridden-Harper, Ryan Seligman, Darryl Z. Fitzsimmons, Alan Guilbert-Lepoutre, Aurélie Jehin, Emmanuel Jorda, Laurent Marsset, Michael Moulane, Youssef Rousselot, Philippe Vernazza, Pierre Yang, Bin Earth and Planetary Astrophysics Astrophysics of Galaxies The interstellar comet 2I/Borisov is the first interstellar object where compositional characterisation was possible throughout its entire perihelion passage. We report all 16 epochs of a comprehensive optical observation campaign with ESO VLT's integral field spectrograph MUSE, spanning 126 days from 2019 November 14 to 2020 March 19. The spatial dust emission of 2I/Borisov was predominantly smooth, with no seasonal effect. A jet-like feature was consistently visible. The gas production morphology of its coma was also smooth and similar for C$_2$, NH$_2$, and CN: symmetric around the photocentre. The production rates of these species gently declined into and beyond perihelion, until 2I's outburst and splitting event in early 2020 March. C$_2$, NH$_2$, and CN production rates all increased, with NH$_2$ being the most significant; the dust emission also slightly reddened. 2I/Borisov is a carbon-depleted, relatively NH$_2$-rich comet when compared to those comets yet measured in the Solar System. |
| title | A portrait throughout perihelion of the NH$_2$-rich interstellar comet 2I/Borisov |
| topic | Earth and Planetary Astrophysics Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2507.05051 |