RS Sagittarii: Revealing the component spectra and the mass transfer
Fuente:
arXiv
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866912565141962752 |
|---|---|
| author | Bakış, Hicran Yıldız, Ömrüm Hilal Bakış, Volkan Yücel, Gökhan |
| author_facet | Bakış, Hicran Yıldız, Ömrüm Hilal Bakış, Volkan Yücel, Gökhan |
| contents | We present an analysis of high-resolution (R ~ 48000) spectroscopic and photometric data of RS Sgr, a short-period Algol-type binary system. For the first time, precise spectroscopic and absolute parameters of the system have been determined. The primary component is identified as a B3 main-sequence star with an effective temperature of 19000K, while the secondary is classified as an A0-type star with a temperature of 9700 K. The secondary appears to have recently evolved off the main sequence and currently fills its Roche lobe, transferring material through the inner Lagrangian point (L1) to the hotter primary component. The Hα emission and absorption features observed in the spectra are attributed to a combination of a low-density circumprimary disk, a gas stream originating from the secondary, and a hot spot formed at the impact site on the primary. The combined analysis of spectroscopic and photometric data yields a system distance of approximately 418 pc, which is consistent with the value derived from GAIA DR3 within the uncertainty limits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_01516 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | RS Sagittarii: Revealing the component spectra and the mass transfer Bakış, Hicran Yıldız, Ömrüm Hilal Bakış, Volkan Yücel, Gökhan Solar and Stellar Astrophysics We present an analysis of high-resolution (R ~ 48000) spectroscopic and photometric data of RS Sgr, a short-period Algol-type binary system. For the first time, precise spectroscopic and absolute parameters of the system have been determined. The primary component is identified as a B3 main-sequence star with an effective temperature of 19000K, while the secondary is classified as an A0-type star with a temperature of 9700 K. The secondary appears to have recently evolved off the main sequence and currently fills its Roche lobe, transferring material through the inner Lagrangian point (L1) to the hotter primary component. The Hα emission and absorption features observed in the spectra are attributed to a combination of a low-density circumprimary disk, a gas stream originating from the secondary, and a hot spot formed at the impact site on the primary. The combined analysis of spectroscopic and photometric data yields a system distance of approximately 418 pc, which is consistent with the value derived from GAIA DR3 within the uncertainty limits. |
| title | RS Sagittarii: Revealing the component spectra and the mass transfer |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2506.01516 |