Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/32895
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Cerrigone, L. | en_US |
dc.contributor.author | UMANA, Grazia Maria Gloria | en_US |
dc.contributor.author | BUEMI, CARLA SIMONA | en_US |
dc.contributor.author | Hora, J.L. | en_US |
dc.contributor.author | TRIGILIO, CORRADO | en_US |
dc.contributor.author | LETO, PAOLO | en_US |
dc.contributor.author | Hart, A. | en_US |
dc.date.accessioned | 2023-01-17T16:34:41Z | - |
dc.date.available | 2023-01-17T16:34:41Z | - |
dc.date.issued | 2014 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/32895 | - |
dc.description.abstract | MWC 930 is a star just ~2{\deg} above the Galactic plane whose nature is not clear and that has not been studied in detail so far. While a post-Asymptotic Giant Branch (AGB) classification was proposed in the past, studies of its optical spectrum and photometry pointed toward strong variability, therefore the object was reclassified as a Luminous Blue Variable (LBV) candidate. LBVs typically undergo phases of strong mass loss in the form of eruptions that can create shells of ejecta around the star. Our goal is to search for the presence of such a circumstellar nebula in MWC 930 and investigate its properties. To do so, we make use of space-based infrared data from our Spitzer campaign performed with the InfraRed Array Camera (IRAC) and the InfraRed Spectrograph (IRS) as well as data from optical and infrared (IR) surveys. In our Spitzer images, we clearly detect an extended shell around MWC 930 at wavelengths longer than 5 um. The mid-infrared spectrum is dominated by the central star and mostly shows forbidden lines of [FeII], with an underlying continuum that decreases with wavelength up to ~15 um and then inverts its slope, displaying a second peak around 60 um, evidence for cold dust grains formed in a past eruption. By modeling the SED, we identify two central components, besides the star and the outer shell. These extra sources of radiation are interpreted as material close to the central star, maybe due to a recent ejection. Features of C-bearing molecules or grains are not detected. | en_US |
dc.language.iso | eng | en_US |
dc.title | Spitzer observations of a circumstellar nebula around the candidate luminous blue variable MWC 930 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/201323099 | en_US |
dc.identifier.scopus | 2-s2.0-84894346685 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/full_html/2014/02/aa23099-13/aa23099-13.html | en_US |
dc.identifier.url | http://www.scopus.com/inward/record.url?eid=2-s2.0-84894346685&partnerID=MN8TOARS | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 562 | en_US |
dc.relation.firstpage | A93 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 7 | en_US |
dc.description.international | sì | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | ASTRONOMY & ASTROPHYSICS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2014A&A...562A..93C | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.orcid | 0000-0002-6972-8388 | - |
crisitem.author.orcid | 0000-0002-7288-4613 | - |
crisitem.author.orcid | 0000-0002-1216-7831 | - |
crisitem.author.orcid | 0000-0003-4864-2806 | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
aa23099-13.pdf | Pdf editoriale | 750.67 kB | Adobe PDF | View/Open |
1312.7086.pdf | arXiv | 872.55 kB | Adobe PDF | View/Open |
Page view(s)
20
checked on May 9, 2024
Download(s)
11
checked on May 9, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.