Automatic detection and quantitative assessment of peculiar galaxy pairs in Sloan Digital Sky Survey arXiv:1407.5000
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by c_cld
http://arxiv.org/abs/1407.5000
Lior Shamir, John Wallin
(Submitted on 18 Jul 2014)
We applied computational tools for automatic detection of peculiar galaxy pairs. We first detected in SDSS DR7 ~400,000 galaxy images with i magnitude 18 that had more than one point spread function, and then applied a machine learning algorithm that detected ~26,000 galaxy images that had morphology similar to the morphology of galaxy mergers. That dataset was mined using a novelty detection algorithm, producing a short list of 500 most peculiar galaxies as quantitatively determined by the algorithm. Manual examination of these galaxies showed that while most of the galaxy pairs in the list were not necessarily peculiar, numerous unusual galaxy pairs were detected. In this paper we describe the protocol and computational tools used >for the detection of peculiar mergers, and provide examples of peculiar galaxy pairs that were detected.
reviewer, William Keel
Cross-match with http://www.galaxyzoo.org.s3.amazonaws.com/subjects/standard/123.....jpg base
SDSS No. objID ra dec
587727230522097827 5 1237670956251414712 24.57851219 -9.537619453
Tidally distorted interacting pair
587739156573585582 10 1237665098996777103 133.7303775 24.57973318
Tidally distorted interacting pair
587744875857642337 13 1237667782806340479 118.4024586 9.395987378
Tidally distorted interacting pair
587733434070860127 40 1237661387085250942 254.7192728 28.3019631
Red with star
587724232110440585 42 1237653651311952031 32.64715995 12.9182263
Merging pair
587729653430222900 44 1237655473976181440 261.0982963 25.60859596
Single arm spiral and companion
587740522398089357 47 1237678578758517009 8.896980414 23.76796253
Close interacting pair with tidal distortions
587011219678527613 50 1237655465926721667 229.9230265 54.82465216
Close pair
587740552454340671 52 1237664089137676332 54.6957984 15.54806413
Close pair
587724232104280165 53 1237666089514434782 18.14808384 14.01248149
Close group of three galaxies
587742863676473541 54 1237668623548022885 181.802408 16.96935067
Possible superposition?
Posted
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by c_cld
Hope we'll get in near future an improved search capability with SDSS Id / GZ id in both ways?
Posted
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by c_cld
1237657220410769516 ; no 19 in arXiv:1407.5000
Close pair of spirals - some evidence of tidal distortion
UGC 05615/VV 312/CGCG 1020.6+5321Posted
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by c_cld
no 2 in arXiv:1407.5000 587730023866761221 1237662262172778590
Tidally distorted interacting pair [RC2] A1488+07B/CGCG 048-028N
flipped
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by c_cld
no 17 in arXiv:1407.5000 587298664650145819 1237661435921629215
A strongly interacting pair of disk galaxies #NGC 4837 / I Zw 046
Posted