Star Formation Histories across the Interacting Galaxy NGC 6872, the Largest-known Spiral

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dc.contributor.authorEufrasio, Rafael T.
dc.contributor.authorDwek, Eli
dc.contributor.authorArendt, Richard
dc.contributor.authorde Mello, Duilia F.
dc.contributor.authorGadotti, Dimitri A.
dc.contributor.authorUrrutia-Viscarra, Fernanda
dc.contributor.authorde Oliveira, Claudia Mendes
dc.contributor.authorBenford, Dominic J.
dc.date.accessioned2022-06-08T20:53:45Z
dc.date.available2022-06-08T20:53:45Z
dc.date.issued2014-10-15
dc.description.abstractNGC 6872, hereafter the Condor, is a large spiral galaxy that is interacting with its closest companion, the S0 galaxy IC 4970. The extent of the Condor provides an opportunity for detailed investigation of the impact of the interaction on the current star formation rate and its history across the galaxy, on the age and spatial distribution of its stellar population, and on the mechanism that drives the star formation activity. To address these issues we analyzed the far-ultraviolet (FUV) to near-infrared (near-IR) spectral energy distribution of seventeen 10 kpc diameter regions across the galaxy, and derived their star formation history, current star formation rate, and stellar population and mass. We find that most of the star formation takes place in the extended arms, with very little star formation in the central 5 kpc of the galaxy, in contrast to what was predicted from previous numerical simulations. There is a trend of increasing star formation activity with distance from the nucleus of the galaxy, and no evidence for a recent increase in the current star formation rate due to the interaction. The nucleus itself shows no significant current star formation activity. The extent of the Condor also provides an opportunity to test the applicability of a single standard prescription for conversion of the FUV + IR (22 μm) intensities to a star formation rate for all regions. We find that the conversion factor differs from region to region, arising from regional differences in the stellar populations.en_US
dc.description.sponsorshipWe thank the anonymous referee for comments that significantly improved the paper. E.D. acknowledges NASA ADAP proposal NNH11ZDA001N and DFdM was funded by NASA ADAP NNX09AC72G. Based on observations made with the NASA Galaxy Evolution Explorer. GALEX is operated for NASA by the California Institute of Technology under NASA contract NAS5-98034. This publication makes use of data products from the 2MASS, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. This work is based on observations made with the Spitzer Space Telescope, obtained from the NASA/IPAC Infrared Science Archive, both of which are operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with the National Aeronautics and Space Administration. This publication makes use of data products from the Wide-field Infrared Survey Explorer, 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.en_US
dc.description.urihttps://iopscience.iop.org/article/10.1088/0004-637X/795/1/89en_US
dc.format.extent14 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m208wi-imlw
dc.identifier.citationRafael T. Eufrasio et al. Star Formation Histories across the Interacting Galaxy NGC 6872, the Largest-known Spiral. The Astrophysical Journal. 795, 89 (2014). https://doi.org/10.1088/0004-637X/795/1/89en_US
dc.identifier.urihttps://doi.org/10.1088/0004-637X/795/1/89
dc.identifier.urihttp://hdl.handle.net/11603/24865
dc.language.isoen_USen_US
dc.publisherIOP Scienceen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Center for Space Sciences and Technology
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis is a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.en_US
dc.rightsPublic Domain Mark 1.0*
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleStar Formation Histories across the Interacting Galaxy NGC 6872, the Largest-known Spiralen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0001-8403-8548en_US

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