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IC 630: Piercing the Veil of the Nuclear Gas
Durre, Mark1; Mould, Jeremy1; Schartmann, Marc1; Uddin, Syed Ashraf2; Cotter, Garrett3
2017-04-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume838Issue:2Pages:20
Corresponding AuthorDurre, Mark(2064944@swin.edu.au)
AbstractIC 630 is a nearby early-type galaxy with a mass of 6 x 10(10) M-circle dot with an intense burst of recent (6Myr) star formation (SF). It shows strong nebular emission lines, with radio and X-ray emission, which classifies it as an active galactic nucleus (AGN). With VLT-SINFONI and Gemini North-NIFS adaptive optics observations (plus supplementary ANU 2.3m WiFeS optical IFU observations), the excitation diagnostics of the nebular emission species show no sign of standard AGN engine excitation; the stellar velocity dispersion also indicates that a supermassive black hole (if one is present) is small (M. = 2.25 x 10(5)M(circle dot)). The luminosity at all wavelengths is consistent with SF at a rate of about 1-2M(circle dot) yr(-1). We measure gas outflows driven by SF at a rate of 0.18M(circle dot) yr(-1) in a face-on truncated cone geometry. We also observe a nuclear cluster or disk and other clusters. Photoionization from young, hot stars is the main excitation mechanism for [Fe II] and hydrogen, whereas shocks are responsible for the H-2 excitation. Our observations are broadly comparable with simulations where a Toomre-unstable, self-gravitating gas disk triggers a burst of SF, peaking after about 30 Myr and possibly cycling with a period of about 200 Myr.
Keywordgalaxies: active galaxies: individual (IC 630) galaxies: ISM galaxies: nuclei galaxies: starburst galaxies: star formation
DOI10.3847/1538-4357/aa662d
WOS KeywordACTIVE GALACTIC NUCLEI ; INTEGRAL-FIELD SPECTROSCOPY ; SUPERMASSIVE BLACK-HOLES ; FE II EMISSION ; INDUCED STAR-FORMATION ; DATA CUBES APPLICATION ; MOLECULAR-HYDROGEN ; HOST GALAXIES ; GEMINI NIFS ; STARBURST GALAXIES
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000398275400003
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23154
Collection中国科学院紫金山天文台
Corresponding AuthorDurre, Mark
Affiliation1.Swinburne Univ Technol, Ctr Astrophys & Supercomp, POB 218, Hawthorn, Vic 3122, Australia
2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
3.Oxford Astrophys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England
Recommended Citation
GB/T 7714
Durre, Mark,Mould, Jeremy,Schartmann, Marc,et al. IC 630: Piercing the Veil of the Nuclear Gas[J]. ASTROPHYSICAL JOURNAL,2017,838(2):20.
APA Durre, Mark,Mould, Jeremy,Schartmann, Marc,Uddin, Syed Ashraf,&Cotter, Garrett.(2017).IC 630: Piercing the Veil of the Nuclear Gas.ASTROPHYSICAL JOURNAL,838(2),20.
MLA Durre, Mark,et al."IC 630: Piercing the Veil of the Nuclear Gas".ASTROPHYSICAL JOURNAL 838.2(2017):20.
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