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Conference Paper: Improving the distances of post-AGB objects in the Milky Way

TitleImproving the distances of post-AGB objects in the Milky Way
Authors
Issue Date2016
PublisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/EJ/journal/conf
Citation
The 11th Pacific Rim Conference on Stellar Astrophysics, Hong Kong, 14-17 December 2015. In Journal of Physics: Conference Series, 2016, v. 728 n. 7, p. 072013:1-072013:2 How to Cite?
AbstractPost-AGB (PAGB) stars are short-lived, low-intermediate mass objects transitioning from the asymptotic giant branch (AGB) to the white dwarf (WD) phase. These objects are characterised by a constant, core-mass dependent luminosity and a large infrared excess from the dusty envelope ejected at the top of the AGB. PAGB stars provide insights into the evolution of their direct descendants, planetary nebulae (PNe). Calculation of physical characteristics of PAGB are dependent on accurately determined distances scarcely available in the literature. Using the Torun catalogue for PAGB objects, supplemented with archival data, we have determined distances to the known population of Galactic PAGB stars. This is by modelling their spectral energy distributions (SED) with black bodies and numerically integrating over the entire wavelength range to determine the total integrated object flux. For most PAGB stars we assumed their luminosities are based on their positional characteristics and stellar evolution models. RV Tauri stars however are known to follow a period-luminosity relation (PLR) reminiscent of type-2 Cepheids. For these variable PAGB stars we determined their luminosities via the PLR and hence their distances. This allows us to overcome the biggest obstacle to characterising these poorly understood objects that play a vital part in Galactic chemical enrichment.
DescriptionConference Theme: Physics and Chemistry of the Late Stages of Stellar Evolution
Persistent Identifierhttp://hdl.handle.net/10722/237688
ISSN
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorVickers, SB-
dc.contributor.authorFrew, DJ-
dc.contributor.authorOwers, MS-
dc.contributor.authorParker, QA-
dc.contributor.authorBojicic, IS-
dc.date.accessioned2017-01-19T03:41:10Z-
dc.date.available2017-01-19T03:41:10Z-
dc.date.issued2016-
dc.identifier.citationThe 11th Pacific Rim Conference on Stellar Astrophysics, Hong Kong, 14-17 December 2015. In Journal of Physics: Conference Series, 2016, v. 728 n. 7, p. 072013:1-072013:2-
dc.identifier.issn1742-6596-
dc.identifier.urihttp://hdl.handle.net/10722/237688-
dc.descriptionConference Theme: Physics and Chemistry of the Late Stages of Stellar Evolution-
dc.description.abstractPost-AGB (PAGB) stars are short-lived, low-intermediate mass objects transitioning from the asymptotic giant branch (AGB) to the white dwarf (WD) phase. These objects are characterised by a constant, core-mass dependent luminosity and a large infrared excess from the dusty envelope ejected at the top of the AGB. PAGB stars provide insights into the evolution of their direct descendants, planetary nebulae (PNe). Calculation of physical characteristics of PAGB are dependent on accurately determined distances scarcely available in the literature. Using the Torun catalogue for PAGB objects, supplemented with archival data, we have determined distances to the known population of Galactic PAGB stars. This is by modelling their spectral energy distributions (SED) with black bodies and numerically integrating over the entire wavelength range to determine the total integrated object flux. For most PAGB stars we assumed their luminosities are based on their positional characteristics and stellar evolution models. RV Tauri stars however are known to follow a period-luminosity relation (PLR) reminiscent of type-2 Cepheids. For these variable PAGB stars we determined their luminosities via the PLR and hence their distances. This allows us to overcome the biggest obstacle to characterising these poorly understood objects that play a vital part in Galactic chemical enrichment.-
dc.languageeng-
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/EJ/journal/conf-
dc.relation.ispartofJournal of Physics: Conference Series (Online Edition)-
dc.rightsJournal of Physics: Conference Series (Online Edition). Copyright © Institute of Physics Publishing.-
dc.rightsThis is an author-created, un-copyedited version of an article published in [insert name of journal]. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/[insert DOI].-
dc.titleImproving the distances of post-AGB objects in the Milky Way-
dc.typeConference_Paper-
dc.identifier.emailFrew, DJ: djfrew@hku.hk-
dc.identifier.emailParker, QA: physhead@hku.hk-
dc.identifier.emailBojicic, IS: ibojicic@hku.hk-
dc.identifier.authorityFrew, DJ=rp02013-
dc.identifier.authorityParker, QA=rp02017-
dc.identifier.authorityBojicic, IS=rp02020-
dc.description.naturepostprint-
dc.identifier.doi10.1088/1742-6596/728/7/072013-
dc.identifier.scopuseid_2-s2.0-84989245036-
dc.identifier.hkuros271024-
dc.identifier.volume728-
dc.identifier.issue7-
dc.identifier.spage072013:1-
dc.identifier.epage072013:2-
dc.identifier.isiWOS:000397958000059-
dc.publisher.placeUnited Kingdom-
dc.customcontrol.immutablesml 170119-

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