Journal Article

Oxford SWIFT integral field spectrograph and multiwavelength observations of the Eagle galaxy at <i>z</i>= 0.77

Susan A. Kassin, L. Fogarty, T. Goodsall, F. J. Clarke, R. W. C. Houghton, G. Salter, N. Thatte, M. Tecza, Roger L. Davies, Benjamin J. Weiner, C. N. A. Willmer, Samir Salim, Michael C. Cooper, Jeffrey A. Newman, Kevin Bundy, C. J. Conselice, A. M. Koekemoer, Lihwai Lin, Leonidas A. Moustakas and Tao Wang

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 417, issue 4, pages 2882-2890
Published in print November 2011 | ISSN: 0035-8711
Published online November 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2011.19449.x
Oxford SWIFT integral field spectrograph and multiwavelength observations of the Eagle galaxy at z= 0.77

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The ‘Eagle’ galaxy at a redshift of 0.77 is studied with the Oxford Short Wavelength Integral Field Spectrograph (SWIFT) and multiwavelength data from the All-wavelength Extended Groth strip International Survey (AEGIS). It was chosen from AEGIS because of the bright and extended emission in its slit spectrum. 3D kinematic maps of the Eagle reveal a gradient in velocity dispersion which spans 35–75 ± 10 km s−1 and a rotation velocity of 25 ± 5 km s−1 uncorrected for inclination. Hubble Space Telescope images suggest it is close to face-on. In comparison with galaxies from AEGIS at similar redshifts, the Eagle is extremely bright and blue in the rest-frame optical, highly star forming, dominated by unobscured star formation and has a low metallicity for its size. This is consistent with its selection. The Eagle is likely undergoing a major merger and is caught in the early stage of a starburst when it has not yet experienced metal enrichment or formed the mass of dust typically found in star-forming galaxies.

Keywords: galaxies: high-redshift; galaxies: interactions; galaxies: irregular; galaxies: kinematics and dynamics

Journal Article.  7892 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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