Resolving the kinematics of the discs around Galactic B[e] supergiants

B[e] supergiants are luminous evolved massive stars. The mass-loss during this phase creates a complex circumstellar environment with atomic, molecular, and dusty regions usually found in rings or disc-like structures. For a better comprehension of the mechanisms behind the formation of these rings,...

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Detalles Bibliográficos
Autores principales:	Maravelias, G., Kraus, Michael, Cidale, Lydia Sonia, Borges Fernades, M., Arias, María Laura, Curé, Michel, Vasilopoulos, G.
Formato:	Articulo Preprint
Lenguaje:	Inglés
Publicado:	2018
Materias:	Ciencias Astronómicas Stars: circumstellar matter Stars: early-type Stars: massive Stars: supergiants Stars: winds, outflows
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/93487 https://academic.oup.com/mnras/article-abstract/480/1/320/5049025?redirectedFrom=fulltext
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-93487
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 Stars: circumstellar matter Stars: early-type Stars: massive Stars: supergiants Stars: winds, outflows
spellingShingle	Ciencias Astronómicas Stars: circumstellar matter Stars: early-type Stars: massive Stars: supergiants Stars: winds, outflows Maravelias, G. Kraus, Michael Cidale, Lydia Sonia Borges Fernades, M. Arias, María Laura Curé, Michel Vasilopoulos, G. Resolving the kinematics of the discs around Galactic B[e] supergiants
topic_facet	Ciencias Astronómicas Stars: circumstellar matter Stars: early-type Stars: massive Stars: supergiants Stars: winds, outflows
description	B[e] supergiants are luminous evolved massive stars. The mass-loss during this phase creates a complex circumstellar environment with atomic, molecular, and dusty regions usually found in rings or disc-like structures. For a better comprehension of the mechanisms behind the formation of these rings, detailed knowledge about their structure and dynamics is essential. To address that, we obtained high-resolution optical and near-infrared (near-IR) spectra for eight selected Galactic B[e] supergiants, for which CO emission has been detected. Assuming Keplerian rotation for the disc, we combine the kinematics obtained from the CO bands in the near-IR with those obtained by fitting the forbidden emission [OI] λ5577, [O I] λλ6300,6363, and [Ca II] λλ7291,7323 lines in the optical to probe the disc structure. We find that the emission originates from multiple ring structures around all B[e] supergiants, with each one of them displaying a unique combination of rings regardless of whether the object is part of a binary system. The confirmed binaries display spectroscopic variations of their line intensities and profiles as well as photometric variability, whereas the ring structures around the single stars are stable.
format	Articulo Preprint
author	Maravelias, G. Kraus, Michael Cidale, Lydia Sonia Borges Fernades, M. Arias, María Laura Curé, Michel Vasilopoulos, G.
author_facet	Maravelias, G. Kraus, Michael Cidale, Lydia Sonia Borges Fernades, M. Arias, María Laura Curé, Michel Vasilopoulos, G.
author_sort	Maravelias, G.
title	Resolving the kinematics of the discs around Galactic B[e] supergiants
title_short	Resolving the kinematics of the discs around Galactic B[e] supergiants
title_full	Resolving the kinematics of the discs around Galactic B[e] supergiants
title_fullStr	Resolving the kinematics of the discs around Galactic B[e] supergiants
title_full_unstemmed	Resolving the kinematics of the discs around Galactic B[e] supergiants
title_sort	resolving the kinematics of the discs around galactic b[e] supergiants
publishDate	2018
url	http://sedici.unlp.edu.ar/handle/10915/93487 https://academic.oup.com/mnras/article-abstract/480/1/320/5049025?redirectedFrom=fulltext
work_keys_str_mv	AT maraveliasg resolvingthekinematicsofthediscsaroundgalacticbesupergiants AT krausmichael resolvingthekinematicsofthediscsaroundgalacticbesupergiants AT cidalelydiasonia resolvingthekinematicsofthediscsaroundgalacticbesupergiants AT borgesfernadesm resolvingthekinematicsofthediscsaroundgalacticbesupergiants AT ariasmarialaura resolvingthekinematicsofthediscsaroundgalacticbesupergiants AT curemichel resolvingthekinematicsofthediscsaroundgalacticbesupergiants AT vasilopoulosg resolvingthekinematicsofthediscsaroundgalacticbesupergiants
bdutipo_str	Repositorios
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Resolving the kinematics of the discs around Galactic B[e] supergiants

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