The neutral counterpart of an uncatalogued nebula and a probable interstellar bubble around wr 53 in the centaurus region

The neutral counterpart of an uncatalogued nebula and a probable interstellar bubble around wr 53 in the centaurus region

From the inspection of optical images at l = 307° we have found an uncata-logued nebula of about 9' in radius, which we named G307.27+0.27. The analysis of the HI-21cm line emission distribution revealed an expanding HI shell that encircles the optical emission region. The shell, placed at a kinematical distance of 4±1 kpc, is suggested to be the Hi counterpart of the optical nebula. CO observations at radio wavelengths, and far and mid IR data, allowed us to detect molecular gas and interstellar dust associated with the structures. The presence of an O6 star at a spectrophotometric distance compatible with that of the shell supports a stellar wind/HII region origin for the whole structure. We also report a probable Hi interstellar bubble related to the Wolf-Rayet star WR 53. Its physical parameters are similar to the parameters of other Hi bubbles around massive stars.

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Main Authors: Martín,M. C., Cappa,C. E., Testori,J. C.
Format: Digital revista
Language:English
Published: Universidad Nacional Autónoma de México, Instituto de Astronomía 2007
Online Access:http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0185-11012007000200002
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spelling oai:scielo:S0185-110120070002000022007-10-30The neutral counterpart of an uncatalogued nebula and a probable interstellar bubble around wr 53 in the centaurus regionMartín,M. C.Cappa,C. E.Testori,J. C. ISM bubbles rayet-ISM HII regions-stars wolf-rayet From the inspection of optical images at l = 307° we have found an uncata-logued nebula of about 9' in radius, which we named G307.27+0.27. The analysis of the HI-21cm line emission distribution revealed an expanding HI shell that encircles the optical emission region. The shell, placed at a kinematical distance of 4±1 kpc, is suggested to be the Hi counterpart of the optical nebula. CO observations at radio wavelengths, and far and mid IR data, allowed us to detect molecular gas and interstellar dust associated with the structures. The presence of an O6 star at a spectrophotometric distance compatible with that of the shell supports a stellar wind/HII region origin for the whole structure. We also report a probable Hi interstellar bubble related to the Wolf-Rayet star WR 53. Its physical parameters are similar to the parameters of other Hi bubbles around massive stars.info:eu-repo/semantics/openAccessUniversidad Nacional Autónoma de México, Instituto de AstronomíaRevista mexicana de astronomía y astrofísica v.43 n.2 20072007-10-01info:eu-repo/semantics/articletext/htmlhttp://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0185-11012007000200002en
institution SCIELO
collection OJS
country México
countrycode MX
component Revista
access En linea
databasecode rev-scielo-mx
tag revista
region America del Norte
libraryname SciELO
language English
format Digital
author Martín,M. C.
Cappa,C. E.
Testori,J. C.
spellingShingle Martín,M. C.
Cappa,C. E.
Testori,J. C.
The neutral counterpart of an uncatalogued nebula and a probable interstellar bubble around wr 53 in the centaurus region
author_facet Martín,M. C.
Cappa,C. E.
Testori,J. C.
author_sort Martín,M. C.
title The neutral counterpart of an uncatalogued nebula and a probable interstellar bubble around wr 53 in the centaurus region
title_short The neutral counterpart of an uncatalogued nebula and a probable interstellar bubble around wr 53 in the centaurus region
title_full The neutral counterpart of an uncatalogued nebula and a probable interstellar bubble around wr 53 in the centaurus region
title_fullStr The neutral counterpart of an uncatalogued nebula and a probable interstellar bubble around wr 53 in the centaurus region
title_full_unstemmed The neutral counterpart of an uncatalogued nebula and a probable interstellar bubble around wr 53 in the centaurus region
title_sort neutral counterpart of an uncatalogued nebula and a probable interstellar bubble around wr 53 in the centaurus region
description From the inspection of optical images at l = 307° we have found an uncata-logued nebula of about 9' in radius, which we named G307.27+0.27. The analysis of the HI-21cm line emission distribution revealed an expanding HI shell that encircles the optical emission region. The shell, placed at a kinematical distance of 4±1 kpc, is suggested to be the Hi counterpart of the optical nebula. CO observations at radio wavelengths, and far and mid IR data, allowed us to detect molecular gas and interstellar dust associated with the structures. The presence of an O6 star at a spectrophotometric distance compatible with that of the shell supports a stellar wind/HII region origin for the whole structure. We also report a probable Hi interstellar bubble related to the Wolf-Rayet star WR 53. Its physical parameters are similar to the parameters of other Hi bubbles around massive stars.
publisher Universidad Nacional Autónoma de México, Instituto de Astronomía
publishDate 2007
url http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0185-11012007000200002
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