2018MNRAS.477.2664M

Query : 2018MNRAS.477.2664M

2018MNRAS.477.2664M - Mon. Not. R. Astron. Soc., 477, 2664-2683 (2018/June-3)

Variability search in M 31 using principal component analysis and the Hubble Source Catalogue.

MORETTI M.I., HATZIDIMITRIOU D., KARAMPELAS A., SOKOLOVSKY K.V., BONANOS A.Z., GAVRAS P. and YANG M.

Abstract (from CDS):

Principal component analysis (PCA) is being extensively used in Astronomy but not yet exhaustively exploited for variability search. The aim of this work is to investigate the effectiveness of using the PCA as a method to search for variable stars in large photometric data sets. We apply PCA to variability indices computed for light curves of 18 152 stars in three fields in M 31 extracted from the Hubble Source Catalogue. The projection of the data into the principal components is used as a stellar variability detection and classification tool, capable of distinguishing between RR Lyrae stars, long-period variables (LPVs) and non-variables. This projection recovered more than 90 per cent of the known variables and revealed 38 previously unknown variable stars (about 30 per cent more), all LPVs except for one object of uncertain variability type. We conclude that this methodology can indeed successfully identify candidate variable stars.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: data analysis - methods: statistical - stars: statistics - stars: variables: general - galaxies: individual: M 31

Simbad objects: 62

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Number of rows : 62
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12650 1
2 [BFS2004] V29 V* 00 44 01.76 +40 40 53.1           ~ 2 0
3 [BFS2004] V48 V* 00 44 02.27 +40 42 16.3           ~ 2 0
4 [BFS2004] V64 V* 00 44 03.27 +40 43 29.4           ~ 2 0
5 [BFS2004] V60 V* 00 44 04.91 +40 41 55.9           ~ 3 0
6 [BFS2004] V84 V* 00 44 05.30 +40 44 05.8           ~ 2 0
7 HSCv1 27663814 V* 00 44 09.933 +39 47 17.05         21.49 ~ 1 0
8 HSCv1 27661867 V* 00 44 15.905 +39 46 43.07         21.498 ~ 1 0
9 HSCv1 27659783 V* 00 44 17.201 +39 47 13.10         21.704 ~ 1 0
10 HSCv1 27619606 V* 00 44 21.248 +39 48 07.40         22.441 ~ 1 0
11 HSCv1 27665958 V* 00 44 21.519 +39 46 06.06         21.98 ~ 1 0
12 HSCv1 27664545 V* 00 44 21.748 +39 45 54.18         21.979 ~ 1 0
13 HSCv1 27654057 V* 00 44 21.840 +39 46 54.97         21.624 ~ 1 0
14 HSCv1 27630664 V* 00 44 21.892 +39 47 49.83         22.421 ~ 1 0
15 HSCv1 27664093 V* 00 44 23.887 +39 46 21.49         22.296 ~ 1 0
16 [BFS2004] V6 V* 00 45 57.91 +40 42 48.1           ~ 2 0
17 [BFS2004] V14 V* 00 45 58.78 +40 42 29.7           ~ 2 0
18 Bol 379 GlC 00 45 58.8308321424 +40 42 31.402542528 17.460 17.032 16.183 15.560 14.936 ~ 75 0
19 [BFS2004] V18 V* 00 45 58.87 +40 42 32.3           ~ 2 0
20 [BFS2004] V19 V* 00 45 58.90 +40 42 30.9           ~ 2 0
21 [BFS2004] V21 V* 00 45 58.90 +40 42 32.7           ~ 2 0
22 [BFS2004] V25 V* 00 45 58.97 +40 42 32.0           ~ 2 0
23 HSCv1 27307954 V* 00 46 00.490 +40 40 29.23         21.834 ~ 1 0
24 HSCv1 27289942 V* 00 46 01.133 +40 41 47.46         22.117 ~ 1 0
25 [BFS2004] V40 RR* 00 46 01.20 +40 42 19.8       25.396 26.139 ~ 4 0
26 HSCv1 27296061 V* 00 46 04.125 +40 40 53.96         21.465 ~ 1 0
27 HSCv1 27276420 V* 00 46 04.434 +40 42 53.12         21.528 ~ 1 0
28 HSCv1 27283624 V* 00 46 05.614 +40 41 59.63         21.932 ~ 1 0
29 [BFS2004] V80 RR* 00 46 05.78 +40 43 28.8       25.500 26.208 ~ 3 0
30 [BFS2004] V76 RR* 00 46 05.86 +40 42 52.9       25.422 26.140 ~ 4 0
31 [BFS2004] V124 RR* 00 46 09.88 +40 43 34.7       25.342 25.876 ~ 3 0
32 [BFS2004] V118 V* 00 46 10.050 +40 43 06.01     22.42   22.94 ~ 3 0
33 [BFS2004] V167 RR* 00 46 10.38 +40 43 44.0       25.402 25.941 ~ 3 0
34 [BFS2004] V173 V* 00 46 10.45 +40 43 01.6           ~ 2 0
35 [BFS2004] V137 RR* 00 46 11.13 +40 43 48.8       25.595 26.280 ~ 3 0
36 HSCv1 27273342 V* 00 46 11.209 +40 44 26.93         21.635 ~ 1 0
37 HSCv1 27284400 V* 00 46 12.049 +40 41 31.96         20.586 ~ 1 0
38 HSCv1 27272426 V* 00 46 12.587 +40 43 59.92         21.671 ~ 1 0
39 HSCv1 27285008 V* 00 46 12.762 +40 41 39.68         21.587 ~ 1 0
40 [BFS2004] V158 V* 00 46 13.67 +40 43 37.6           ~ 2 0
41 HSCv1 22210620 V* 00 49 00.060 +42 45 44.11         21.845 ~ 1 0
42 HSCv1 22209784 V* 00 49 00.795 +42 45 57.02         21.718 ~ 1 0
43 HSCv1 22212431 V* 00 49 03.095 +42 43 37.99         21.826 ~ 1 0
44 HSCv1 22221197 V* 00 49 04.387 +42 44 34.10         25.637 ~ 1 0
45 HSCv1 22203253 Ce* 00 49 04.67 +42 44 33.4     24.65 24.615 25.168 ~ 3 0
46 HSCv1 22259268 V* 00 49 06.522 +42 43 52.74         22.977 ~ 1 0
47 HSCv1 22208319 V* 00 49 06.758 +42 45 52.78         22.163 ~ 1 0
48 HSCv1 22206385 V* 00 49 07.976 +42 44 16.19         21.379 ~ 1 0
49 HSCv1 22196858 V* 00 49 09.513 +42 46 24.46         20.882 ~ 1 0
50 HSCv1 22219207 V* 00 49 09.831 +42 43 58.66         21.832 ~ 1 0
51 HSCv1 22211719 V* 00 49 09.924 +42 45 41.00         21.363 ~ 1 0
52 HSCv1 22206501 V* 00 49 10.720 +42 43 53.47         21.76 ~ 1 0
53 HSCv1 22197833 V* 00 49 11.174 +42 45 49.07         21.333 ~ 1 0
54 HSCv1 22210819 V* 00 49 11.189 +42 45 43.88         21.673 ~ 1 0
55 HSCv1 22208821 V* 00 49 11.216 +42 45 32.16         21.468 ~ 1 0
56 HSCv1 22217682 V* 00 49 11.247 +42 44 23.47         21.8 ~ 1 0
57 HSCv1 22200824 V* 00 49 11.723 +42 45 14.23         21.922 ~ 1 0
58 HSCv1 22209236 V* 00 49 12.337 +42 46 10.41         21.487 ~ 1 0
59 HSCv1 22211391 V* 00 49 15.813 +42 44 27.54         21.618 ~ 1 0
60 HSCv1 22204580 V* 00 49 17.181 +42 44 12.66         21.89 ~ 1 0
61 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7066 0
62 NAME Andromeda Stream St* ~ ~           ~ 66 1

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