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Imaging of NGC 5907's stellar stream

Published online by Cambridge University Press:  09 May 2016

Seppo Laine ,
Carl J. Grillmair ,
David Martínez–Delgado ,
Aaron J. Romanowsky ,
Peter L. Capak ,
Richard G. Arendt ,
Matthew L. N. Ashby ,
James E. Davies ,
Steven R. Majewski  and
R. Jay GaBany
Seppo Laine
Affiliation:
Spitzer Science Center—Caltech, MS 314-6, Pasadena, CA 91125, USA, email: [email protected]
Carl J. Grillmair
Affiliation:
Spitzer Science Center—Caltech, MS 314-6, Pasadena, CA 91125, USA, email: [email protected]
David Martínez–Delgado
Affiliation:
Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg, Mönchhofstr. 12-14, D-69120 Heidelberg, Germany
Aaron J. Romanowsky
Affiliation:
Department of Physics and Astronomy, San José State University, One Washington Square, San Jose, CA 95192
Peter L. Capak
Affiliation:
Spitzer Science Center—Caltech, MS 314-6, Pasadena, CA 91125, USA, email: [email protected]
Richard G. Arendt
Affiliation:
CRESST/UMBC/NASA GSFC, Code 665, Greenbelt, MD 20771, USA
Matthew L. N. Ashby
Affiliation:
Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA
James E. Davies
Affiliation:
Minor Planet Center, Harvard-Smithsonian Center for Astrophysics, 60 Garden St, MS-18, Cambridge, MA 02138. USA
Steven R. Majewski
Affiliation:
Department of Astronomy, University of Virginia, Charlottesville, VA 22904, USA
R. Jay GaBany
Affiliation:
Black Bird Observatory, 5660 Brionne Drive, San Jose, CA 95118, USA
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Abstract

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We have obtained deep g, r, and i-band Subaru and ultra-deep 3.6 μm IRAC images of parts of the multiply-wrapped stellar stream around the nearby edge-on galaxy NGC 5907. We have fitted the surface brightness measurements of the stream with FSPS stellar population synthesis models to derive the metallicity and age of the brightest parts of the stream. The resulting relatively high metallicity ([Fe/H] = −0.3) is consistent with a major merger scenario but a satellite accretion event cannot be ruled out.

Keywords

galaxies: evolutiongalaxies: halosgalaxies: individual (NGC 5907)galaxies: interactionsgalaxies: structure
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Issue S317: The General Assembly of Galaxy Halos: Structure, Origin and Evolution , August 2015 , pp. 324 - 325
Copyright
Copyright © International Astronomical Union 2016 

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