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The Cosmic Skidmark: witnessing galaxy transformation at z = 0.19

Published online by Cambridge University Press:  09 February 2015

David N. A. Murphy
David N. A. Murphy*
Affiliation:
Instituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile email: dmurphy@astro.puc.cl
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Abstract

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We present an early-look analysis of the “Cosmic Skidmark”. Discovered following visual inspection of the Geach, Murphy & Bower (2011) SDSS Stripe 82 cluster catalogue generated by ORCA (an automated cluster algorithm searching for red-sequences; Murphy, Geach & Bower 2012), this z = 0.19 1.4L⋆ galaxy appears to have been caught in the rare act of transformation while accreting onto an estimated 1013–1014h−1 M⊙-mass galaxy group. SDSS spectroscopy reveals clear signatures of star formation whilst deep optical imaging reveals a pronounced 50 kpc cometary tail. Pending completion of our ALMA Cycle 2 and IFU observations, we show here preliminary analysis of this target.

Keywords

galaxies: evolution - galaxies: clusters: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S309: Galaxies in 3D across the Universe , July 2014 , pp. 230 - 231
Copyright
Copyright © International Astronomical Union 2015 

References

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