Isolated hot stars in the galactic center vicinity Cotera, A en_US Simpson, John en_US Erickson, E en_US Colgan, Sean en_US Burton, Michael en_US Allen, David en_US 2021-11-25T13:06:43Z 2021-11-25T13:06:43Z 1999 en_US
dc.description.abstract Using near-infrared imaging and spectroscopy, we discuss the discovery of six emission-line sources within 20 pc of Sgr A West but outside of the central parsec. The objects are coincident with stars seen in the J, H, and K images; all have Brγ (2.166 μm) in emission, several also have He i (2.058 and 2.112/3 μm), and some have He ii (2.189 μm) emission lines. Comparison of the H- and K-band spectra of the newly discovered stars with recently published infrared spectral atlases of optically classified stars suggests that most of these stars are similar to massive stars in transition (e.g., Ofpe/WN9, B[e], and LBV), although one is definitely a WN6 star. Two of the potential stars are associated with the radio emission regions A–D near Sgr A East, three are near or within the radio emission regions H1–H8 (nomenclature from Yusef-Zadeh & Morris), the last is near G0.10+0.02 and is likely to be associated with the G0.12+0.02 (Arches) cluster of stars, discussed in a previous paper. The stars are shown to be significant sources of ionization for their associated radio emission regions, with several capable of completely ionizing the regions. These results provide additional support for the idea that these thermal radio regions, and similar such regions in the Galactic center, are indeed photoionized by hot young stars. en_US
dc.language English
dc.language.iso EN en_US
dc.rights CC BY-NC-ND 3.0 en_US
dc.rights.uri en_US
dc.source Legacy MARC en_US
dc.title Isolated hot stars in the galactic center vicinity en_US
dc.type Journal Article en
dcterms.accessRights metadata only access
dspace.entity.type Publication en_US
unsw.identifier.doiPublisher en_US
unsw.relation.faculty Engineering
unsw.relation.faculty Science
unsw.relation.ispartofissue 2 en_US
unsw.relation.ispartofjournal Astrophysical Journal en_US
unsw.relation.ispartofpagefrompageto 747-758 en_US
unsw.relation.ispartofvolume 510 en_US
unsw.relation.originalPublicationAffiliation Cotera, A en_US
unsw.relation.originalPublicationAffiliation Simpson, John, Computer Science & Engineering, Faculty of Engineering, UNSW en_US
unsw.relation.originalPublicationAffiliation Erickson, E en_US
unsw.relation.originalPublicationAffiliation Colgan, Sean en_US
unsw.relation.originalPublicationAffiliation Burton, Michael, Physics, Faculty of Science, UNSW en_US
unsw.relation.originalPublicationAffiliation Allen, David, Angle-Australian Observatory, Epping 2121, Australia en_US School of Computer Science and Engineering * School of Physics *
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