The Cosmic Skidmark: witnessing galaxy transformation at z = 0.19
Abstract 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...
| Published in: | Proceedings of the International Astronomical Union |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
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Cambridge University Press (CUP)
2014
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1017/s1743921314009752 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1743921314009752 |
| Summary: | Abstract 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 10 13 –10 14 h −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. |
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