Resolving the Circumstellar Environment of the Galactic B[e] Supergiant Star MWC 137 from Large to Small Scales

The Galactic object MWC 137 has been suggested to belong to the group of B[e] supergiants. However, with its large-scale optical bipolar ring nebula and high-velocity jet and knots, it is a rather atypical representative of this class. We performed multiwavelength observations spreading from the opt...

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Detalles Bibliográficos
Autores principales:	Kraus, Michaela, Liimets, Tiina, Cappa, Cristina Elisabet, Cidale, Lydia Sonia, Nickeler, Dieter H., Duronea, Nicolás Urbano, Arias, María Laura, Gunawan, Diah S., Oksala, Mary E., Borges Fernandes, Marcelo, Maravelias, Grigoris, Curé, Michel, Santander García, Miguel
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2017
Materias:	Ciencias Astronómicas circumstellar matter stars: early-type stars: individual (MWC 137) stars: massive supergiants
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/87196
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-87196
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 circumstellar matter stars: early-type stars: individual (MWC 137) stars: massive supergiants
spellingShingle	Ciencias Astronómicas circumstellar matter stars: early-type stars: individual (MWC 137) stars: massive supergiants Kraus, Michaela Liimets, Tiina Cappa, Cristina Elisabet Cidale, Lydia Sonia Nickeler, Dieter H. Duronea, Nicolás Urbano Arias, María Laura Gunawan, Diah S. Oksala, Mary E. Borges Fernandes, Marcelo Maravelias, Grigoris Curé, Michel Santander García, Miguel Resolving the Circumstellar Environment of the Galactic B[e] Supergiant Star MWC 137 from Large to Small Scales
topic_facet	Ciencias Astronómicas circumstellar matter stars: early-type stars: individual (MWC 137) stars: massive supergiants
description	The Galactic object MWC 137 has been suggested to belong to the group of B[e] supergiants. However, with its large-scale optical bipolar ring nebula and high-velocity jet and knots, it is a rather atypical representative of this class. We performed multiwavelength observations spreading from the optical to the radio regimes. Based on optical imaging and long-slit spectroscopic data, we found that the northern parts of the large-scale nebula are predominantly blueshifted, while the southern regions appear mostly redshifted. We developed a geometrical model consisting of two double cones. Although various observational features can be approximated with such a scenario, the observed velocity pattern is more complex. Using near-infrared integral-field unit spectroscopy, we studied the hot molecular gas in the vicinity of the star. The emission from the hot CO gas arises in a small-scale disk revolving around the star on Keplerian orbits. Although the disk itself cannot be spatially resolved, its emission is reflected by the dust arranged in arc-like structures and the clumps surrounding MWC 137 on small scales. In the radio regime, we mapped the cold molecular gas in the outskirts of the optical nebula. We found that large amounts of cool molecular gas and warm dust embrace the optical nebula in the east, south, and west. No cold gas or dust was detected in the north and northwestern regions. Despite the new insights into the nebula kinematics gained from our studies, the real formation scenario of the large-scale nebula remains an open issue.
format	Articulo Articulo
author	Kraus, Michaela Liimets, Tiina Cappa, Cristina Elisabet Cidale, Lydia Sonia Nickeler, Dieter H. Duronea, Nicolás Urbano Arias, María Laura Gunawan, Diah S. Oksala, Mary E. Borges Fernandes, Marcelo Maravelias, Grigoris Curé, Michel Santander García, Miguel
author_facet	Kraus, Michaela Liimets, Tiina Cappa, Cristina Elisabet Cidale, Lydia Sonia Nickeler, Dieter H. Duronea, Nicolás Urbano Arias, María Laura Gunawan, Diah S. Oksala, Mary E. Borges Fernandes, Marcelo Maravelias, Grigoris Curé, Michel Santander García, Miguel
author_sort	Kraus, Michaela
title	Resolving the Circumstellar Environment of the Galactic B[e] Supergiant Star MWC 137 from Large to Small Scales
title_short	Resolving the Circumstellar Environment of the Galactic B[e] Supergiant Star MWC 137 from Large to Small Scales
title_full	Resolving the Circumstellar Environment of the Galactic B[e] Supergiant Star MWC 137 from Large to Small Scales
title_fullStr	Resolving the Circumstellar Environment of the Galactic B[e] Supergiant Star MWC 137 from Large to Small Scales
title_full_unstemmed	Resolving the Circumstellar Environment of the Galactic B[e] Supergiant Star MWC 137 from Large to Small Scales
title_sort	resolving the circumstellar environment of the galactic b[e] supergiant star mwc 137 from large to small scales
publishDate	2017
url	http://sedici.unlp.edu.ar/handle/10915/87196
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Resolving the Circumstellar Environment of the Galactic B[e] Supergiant Star MWC 137 from Large to Small Scales

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