Intriguing detection of ¹²CO molecular emission in a classical Be star
In the group of B stars with spectroscopic peculiarities, we can find the Be and the B[e] stars. The Be stars are early-type rapid rotators that present, as their principal characteristic, emission lines of hydrogen and singly ionized metals due to the presence of a gaseous envelope. The B[e] stars...
Guardado en:
| Autores principales: | , , , , , , |
|---|---|
| Formato: | Articulo Preprint |
| Lenguaje: | Inglés |
| Publicado: |
2021
|
| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/125601 |
| Aporte de: |
| id |
I19-R120-10915-125601 |
|---|---|
| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Astronómicas Techniques: spectroscopic Circumstellar matter Stars: emission-line, Be |
| spellingShingle |
Ciencias Astronómicas Techniques: spectroscopic Circumstellar matter Stars: emission-line, Be Cochetti, Yanina Roxana Arias, María Laura Kraus, Michaela Cidale, Lydia Sonia Torres, Andrea Fabiana Granada, A. Maryeva, O. V. Intriguing detection of ¹²CO molecular emission in a classical Be star |
| topic_facet |
Ciencias Astronómicas Techniques: spectroscopic Circumstellar matter Stars: emission-line, Be |
| description |
In the group of B stars with spectroscopic peculiarities, we can find the Be and the B[e] stars. The Be stars are early-type rapid rotators that present, as their principal characteristic, emission lines of hydrogen and singly ionized metals due to the presence of a gaseous envelope. The B[e] stars present in their spectra heterogeneous features that reveal the presence of regions with very different properties in a gaseous and dusty envelope. Our goal is to study the evolution of the disks around peculiar B stars through the variability of their physical properties and dynamical structure, as well as to set constraints on different models and disk forming mechanisms. Throughout the last decade, we have carried out temporal monitoring of a sample of objects in the near infrared using spectroscopic facilities at the Gemini and Las Campanas Observatories. In the present work, we focus on the classical Be star 12 Vul, for which also optical spectra have been collected quasi-simultaneously. We observed variability in the hydrogen line profiles of 12 Vul, attributed to dissipating and building-up processes of the circumstellar envelope. Also, we found that this Be star presented the ¹²CO band heads in emission in one observation. The emission of this molecule has not been previously reported in a Be star, while it is a common feature among B[e] stars. We obtained parameters to describe the ¹²CO emitting region and propose different scenarios to explain this intriguing emission. |
| format |
Articulo Preprint |
| author |
Cochetti, Yanina Roxana Arias, María Laura Kraus, Michaela Cidale, Lydia Sonia Torres, Andrea Fabiana Granada, A. Maryeva, O. V. |
| author_facet |
Cochetti, Yanina Roxana Arias, María Laura Kraus, Michaela Cidale, Lydia Sonia Torres, Andrea Fabiana Granada, A. Maryeva, O. V. |
| author_sort |
Cochetti, Yanina Roxana |
| title |
Intriguing detection of ¹²CO molecular emission in a classical Be star |
| title_short |
Intriguing detection of ¹²CO molecular emission in a classical Be star |
| title_full |
Intriguing detection of ¹²CO molecular emission in a classical Be star |
| title_fullStr |
Intriguing detection of ¹²CO molecular emission in a classical Be star |
| title_full_unstemmed |
Intriguing detection of ¹²CO molecular emission in a classical Be star |
| title_sort |
intriguing detection of ¹²co molecular emission in a classical be star |
| publishDate |
2021 |
| url |
http://sedici.unlp.edu.ar/handle/10915/125601 |
| work_keys_str_mv |
AT cochettiyaninaroxana intriguingdetectionof12comolecularemissioninaclassicalbestar AT ariasmarialaura intriguingdetectionof12comolecularemissioninaclassicalbestar AT krausmichaela intriguingdetectionof12comolecularemissioninaclassicalbestar AT cidalelydiasonia intriguingdetectionof12comolecularemissioninaclassicalbestar AT torresandreafabiana intriguingdetectionof12comolecularemissioninaclassicalbestar AT granadaa intriguingdetectionof12comolecularemissioninaclassicalbestar AT maryevaov intriguingdetectionof12comolecularemissioninaclassicalbestar |
| bdutipo_str |
Repositorios |
| _version_ |
1764820451930931201 |