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Identifying Type IIn supernova progenitors in our Galaxy: the circumstellar environment of the Galactic luminous blue variable candidate Gal 026.47+0.02

Umana, G. and Ingallinera, A. and Trigilio, C. and Buemi, C. S. and Leto, P. and Agliozzo, C. and Noriega-Crespo, A. and Flagey, N. and Paladini, R. and Molinari, S. (2012) Identifying Type IIn supernova progenitors in our Galaxy: the circumstellar environment of the Galactic luminous blue variable candidate Gal 026.47+0.02. Monthly Notices of the Royal Astronomical Society, 427 (4). pp. 2975-2984. ISSN 0035-8711. doi:10.1111/j.1365-2966.2012.22018.x. https://resolver.caltech.edu/CaltechAUTHORS:20130114-141438128

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Abstract

New data from the Herschel Infrared Galactic Plane Survey (Hi-GAL) and the Expanded Very Large Array, together with ancillary multifrequency data from different archives, have provided a comprehensive picture of the circumstellar envelope (CSE) surrounding the Galactic luminous blue variable (LBV) candidate Gal 026.47+0.02. The high angular resolution of both the 70-μm and 6-cm maps has allowed us to appreciate finest details of the nebula, whose morphology is consistent with a series of nested tori. The inner torus, which is close to the central object, is fully ionized, indicating events of aspherical mass loss. We have derived the physical properties of the CSE, including, in particular, one of the highest current-day mass losses from the central object and a very massive nebula, which consists of, at least, 17 M_⊙ of ionized gas, with 1.2–3.2 × 10^(−2)  M_⊙ in the form of dust. Altogether, the physical properties of Gal 026.47+0.02, including a very high stellar luminosity, point towards a very massive progenitor on the main sequence. According to the current models for Type IIn supernovae, the CSEs associated with possible progenitors have well constrained properties in both content and morphology. The derived physical characteristics of the nebula associated with Gal 026.47+0.02 actually satisfy all such requirements, providing some observational evidence of a direct link between a LBV and a possible Type IIn supernova.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1111/j.1365-2966.2012.22018.xDOIUNSPECIFIED
http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2966.2012.22018.x/fullPublisherUNSPECIFIED
ORCID:
AuthorORCID
Ingallinera, A.0000-0002-3137-473X
Trigilio, C.0000-0002-1216-7831
Agliozzo, C.0000-0003-1749-2542
Noriega-Crespo, A.0000-0002-6296-8960
Flagey, N.0000-0002-8763-1555
Paladini, R.0000-0002-5158-243X
Additional Information:© 2012 The Authors. Monthly Notices of the Royal Astronomical Society © 2012 RAS. Accepted 2012 August 30. Received 2012 August 20; in original form 2012 March 7. Article first published online: 28 Nov. 2012. We wish to thank an anonymous referee for suggestions that have helped to improve the paper. This publication makes use of data products from WISE, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. The Very Large Array of the National Radio Astronomy Observatory is a facility of the National Science Foundation, operated under cooperative agreement by Associated Universities, Inc. This research is supported by ASI contract I/038/08/0 ‘HI-GAL’.
Funders:
Funding AgencyGrant Number
NASAUNSPECIFIED
ASI (Italy)I/038/08/0
Subject Keywords:stars: early-type; stars: individual: Gal 026.47+0.02; stars: winds, outflows; infrared: stars; continuum: stars
Issue or Number:4
DOI:10.1111/j.1365-2966.2012.22018.x
Record Number:CaltechAUTHORS:20130114-141438128
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20130114-141438128
Official Citation:Umana, G., Ingallinera, A., Trigilio, C., Buemi, C. S., Leto, P., Agliozzo, C., Noriega-Crespo, A., Flagey, N., Paladini, R. and Molinari, S. (2012), Identifying Type IIn supernova progenitors in our Galaxy: the circumstellar environment of the Galactic luminous blue variable candidate Gal 026.47+0.02. Monthly Notices of the Royal Astronomical Society, 427: 2975–2984. doi: 10.1111/j.1365-2966.2012.22018.x
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36357
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:15 Jan 2013 00:17
Last Modified:09 Nov 2021 23:21

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