Observations of Ultraluminous Infrared Galaxies with the Infrared Spectrograph (IRS) on the Spitzer Space Telescope : Early Results on Markarian 1014, Markarian 463, and UGC 5101 | Zendy

L. Armus | Zendy; V. Charmandaris | Zendy; H. W. W. Spoon | Zendy; J. R. Houck | Zendy; B. T. Soifer | Zendy; Bernhard R. Brandl | Zendy; P. N. Appleton | Zendy; Harry I. Teplitz | Zendy; S. J. U. Higdon | Zendy; D. W. Weedman | Zendy; D. Devost | Zendy; P. W. Morris | Zendy; K. I. Uchida | Zendy; J. Van Cleve | Zendy; D. J. Barry | Zendy; G. C. Sloan | Zendy; Carl J. Grillmair | Zendy; M. Burgdorf | Zendy; S. B. FajardoAcosta | Zendy; James G. Ingalls | Zendy; James L. Higdon | Zendy; Lei Hao | Zendy; J. BernardSalas | Zendy; T. Herter | Zendy; J. Troeltzsch | Zendy; B. Unruh | Zendy; M. Winghart | Zendy

Open Access

Observations of Ultraluminous Infrared Galaxies with the Infrared Spectrograph (IRS) on the Spitzer Space Telescope : Early Results on Markarian 1014, Markarian 463, and UGC 5101

Author(s) -

L. Armus,

V. Charmandaris,

H. W. W. Spoon,

J. R. Houck,

B. T. Soifer,

Bernhard R. Brandl,

P. N. Appleton,

Harry I. Teplitz,

S. J. U. Higdon,

D. W. Weedman,

D. Devost,

P. W. Morris,

K. I. Uchida,

J. Van Cleve,

D. J. Barry,

G. C. Sloan,

Carl J. Grillmair,

M. Burgdorf,

S. B. FajardoAcosta,

James G. Ingalls,

James L. Higdon,

Lei Hao,

J. BernardSalas,

T. Herter,

J. Troeltzsch,

B. Unruh,

M. Winghart

Publication year - 2004

Publication title -

the astrophysical journal supplement series

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.546

H-Index - 277

eISSN - 1538-4365

pISSN - 0067-0049

DOI - 10.1086/422915

Subject(s) - physics , astrophysics , galaxy , infrared , luminous infrared galaxy , spectrograph , astronomy , spectral line

We present spectra taken with the Infrared Spectrograph on Spitzer coveringthe 5-38micron region of three Ultraluminous Infrared Galaxies (ULIRGs): Mrk1014 (z=0.163), and Mrk 463 (z=0.051), and UGC 5101 (z=0.039). The continua ofUGC 5101 and Mrk 463 show strong silicate absorption suggesting significantoptical depths to the nuclei at 10microns. UGC 5101 also shows the clearpresence of water ice in absorption. PAH emission features are seen in both Mrk1014 and UGC 5101, including the 16.4micron line in UGC 5101. The finestructure lines are consistent with dominant AGN power sources in both Mrk 1014and Mrk 463. In UGC 5101 we detect the [NeV] 14.3micron emission line providingthe first direct evidence for a buried AGN in the mid-infrared. The detectionof the 9.66micron and 17.03micron H$_{2}$ emission lines in both UGC 5101 andMrk 463 suggest that the warm molecular gas accounts for 22% and 48% of thetotal molecular gas masses in these galaxies.Comment: Accepted in ApJ Sup. Spitzer Special Issue, 4 pages, 3 figure

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