2019A&A...623A.116K


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST05:35:58

2019A&A...623A.116K - Astronomy and Astrophysics, volume 623A, 116-116 (2019/3-1)

Multiplicity of Galactic Cepheids and RR Lyrae stars from Gaia DR2. I. Binarity from proper motion anomaly.

KERVELLA P., GALLENNE A., EVANS N.R., SZABADOS L., ARENOU F., MERAND A., PROTO Y., KARCZMAREK P., NARDETTO N., GIEREN W. and PIETRZYNSKI G.

Abstract (from CDS):


Context. Classical Cepheids (CCs) and RR Lyrae stars (RRLs) are important classes of variable stars used as standard candles to estimate galactic and extragalactic distances. Their multiplicity is imperfectly known, particularly for RRLs. Astoundingly, to date only one RRL has convincingly been demonstrated to be a binary, TU UMa, out of tens of thousands of known RRLs.
Aims. Our aim is to detect the binary and multiple stars present in a sample of Milky Way CCs and RRLs.
Methods. In the present article, we combine the HIPPARCOS and Gaia DR2 positions to determine the mean proper motion of the targets, and we search for proper motion anomalies (PMa) caused by close-in orbiting companions.
Results. We identify 57 CC binaries from PMa out of 254 tested stars and 75 additional candidates, confirming the high binary fraction of these massive stars. For 28 binary CCs, we determine the companion mass by combining their spectroscopic orbital parameters and astrometric PMa. We detect 13 RRLs showing a significant PMa out of 198 tested stars, and 61 additional candidates.
Conclusions. We determine that the binary fraction of CCs is likely above 80%, while that of RRLs is at least 7%. The newly detected systems will be useful to improve our understanding of their evolutionary states. The discovery of a significant number of RRLs in binary systems also resolves the long-standing mystery of their extremely low apparent binary fraction.

Abstract Copyright: © P. Kervella et al. 2019

Journal keyword(s): stars: variables: Cepheids - stars: variables: RR Lyrae - astrometry - proper motions - binaries: general - binaries: close

VizieR on-line data: <Available at CDS (J/A+A/623/A116): ceppma.dat rrlyrpma.dat>

Status at CDS:   Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 92

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Number of rows : 92

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* V363 Cas RR* 00 15 14.3334818574 +60 20 25.688604120   11.26 10.68     kF6hF7 41 0
2 V* SW And RR* 00 23 43.0897765461 +29 24 03.632673465 9.53 9.34 9.15     A7IIImF0 236 0
3 V* DL Cas cC* 00 29 58.5886100054 +60 12 43.069687745 10.66 9.88 8.63   7.582 G1Ib-IIHdel-1 295 0
4 V* XX And RR* 01 17 27.4143098635 +38 57 02.048480248   11.00 10.62     A2 117 0
5 V* CW Cet RR* 01 23 30.2384285153 -13 55 27.189005114   8.91 8.34     F6IV 10 0
6 V* BY Cas cC* 01 47 11.9193204766 +61 25 20.952299938   11.5 10.369     F5 111 0
7 * alf UMi B V* 02 30 36.0767975155 +89 15 39.204342239   8.69 8.20     F3V 32 0
8 * alf UMi cC* 02 31 49.09456 +89 15 50.7923 3.00 2.62 2.02 1.53 1.22 F8Ib 609 2
9 V* SU Cas cC* 02 51 58.7508894403 +68 53 18.601570075 6.92 6.44 5.80     F5.5III+ 406 1
10 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5665 1
11 V* RW Cam cC* 03 54 21.7725406302 +58 39 11.966964971   10.02 8.72   7.054 F8 156 0
12 V* RX Cam cC* 04 04 58.4642958819 +58 39 35.218272520   8.85 7.70   6.233 G2Ib+A0V 176 0
13 V* RV Tau Mi* 04 47 06.7238218181 +26 10 45.530144720   11.00 9.80     K0 265 0
14 V* AW Per cC* 04 47 46.3148651549 +36 43 22.033445140   8.46 7.51   6.200 F0+B6: 200 1
15 * 64 Eri dS* 04 59 55.7373538642 -12 32 14.683584404   5.036 4.770     F0V 78 0
16 V* RX Aur cC* 05 01 23.1881737714 +39 57 37.422344258   8.49 7.62   6.594 G0III 191 0
17 V* CK Cam cC* 05 06 31.6431013079 +55 21 12.703126896   8.56 7.59     G5 45 0
18 V* SY Aur cC* 05 12 39.2271412155 +42 49 54.415802821   9.97 9.05   7.851 F5III 113 0
19 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14826 1
20 * bet Dor cC* 05 33 37.5125319201 -62 29 23.323100433 5.13 4.58 3.76 3.55 3.12 F8/G0Ib 345 0
21 V* T Mon cC* 06 25 12.9997562821 +07 05 08.561189768 8.24 7.20 5.98   4.996 G3Iabv+A0p 441 1
22 * alf CMa SB* 06 45 08.91728 -16 42 58.0171 -1.51 -1.46 -1.46 -1.46 -1.43 A1V+DA 1393 0
23 V* V526 Mon cC* 07 01 53.6186125378 -01 07 51.452237915   9.20 8.67     F3III 68 0
24 * zet Gem cC* 07 04 06.5307903 +20 34 13.073871 5.20 4.58 3.79   3.082 G1Ib 529 0
25 V* V465 Mon cC* 07 08 09.3121532568 -00 03 56.575387117   11.07       G0 70 0
26 V* TV CMa cC* 07 09 15.4113468927 -13 47 09.919739837   11.58 10.59     F5 68 0
27 V* RZ CMa cC* 07 21 32.8572494264 -16 41 14.000346928   10.75 9.72   8.477 F6 80 0
28 V* V764 Mon RR* 07 37 43.1988870134 -07 43 37.976761604   7.34 7.08     A5IV 14 0
29 V* FT UMa RR* 08 54 30.3264986847 +51 14 40.355649648   9.64 9.20 9.0   F0 21 0
30 V* T Ant cC* 09 33 50.8595664736 -36 36 56.742348780   9.93 9.26     G5 72 0
31 V* W UMa WU* 09 43 45.4704899627 +55 57 09.066718574   8.54 7.75     G2Vn 631 1
32 V* FN Vel cC* 09 48 41.4896478034 -55 31 10.351022956   11.24 10.25     F9II+? 34 0
33 V* WY Ant RR* 10 16 04.9458687043 -29 43 42.415589871   11.03 10.78     A8.7 110 0
34 V* RY Vel cC* 10 20 41.0317627466 -55 19 17.035924264   9.71 7.86   6.840 F5Ib/II 129 0
35 V* YZ Car cC* 10 28 16.8451607919 -59 21 00.677571694 9.79 9.11 8.24   7.443 G5 114 0
36 [KPR2005] 60 OpC 10 33 07 -58 28.8           ~ 14 0
37 V* Y Car cC* 10 33 10.8510871240 -58 29 55.077771331   8.75 8.16     F0/3 127 0
38 V* ER Car cC* 11 09 41.1427308840 -58 50 15.811006640   7.59 6.79   5.962 G1Iab/b 119 0
39 V* TU UMa RR* 11 29 48.4896121348 +30 04 02.380342849 9.56 9.41 9.26     F2 204 0
40 V* V419 Cen cC* 11 30 54.4295934697 -56 53 55.835019509   8.90 8.19     F7II 92 0
41 V* RT Mus cC* 11 44 32.8829776774 -67 18 18.886572773   9.69 8.57     F8 90 0
42 V* UU Vir RR* 12 08 35.0723483286 -00 27 24.303909321 10.13 9.99 9.90     F2 141 1
43 V* S Mus cC* 12 12 47.0194644681 -70 09 06.436474127 7.58 8.80 8.33 7.39 5.196 F6Ib+B5V 234 0
44 V* SU Cru cC* 12 18 16.93315 -63 16 48.5642   11.05 9.54     M 77 0
45 V* R Cru cC* 12 23 37.6883962336 -61 37 44.856977549 7.41 7.00 6.42     F7Ib/II 139 0
46 V* R Mus cC* 12 42 05.0256100705 -69 24 27.196561465 7.65 7.11 6.33   5.499 F7Ib 143 0
47 V* XX Cen cC* 13 40 18.6446943543 -57 36 47.444003198   8.72 7.30   6.747 F7/8II 168 0
48 * 26 Cir cC* 14 52 35.2532439095 -63 48 35.417176347   6.66 5.96   4.993 F8II 122 0
49 V* EN TrA pA* 14 57 00.6830179855 -68 50 22.901317885   9.42 8.70     F2Ib 65 0
50 V* LR TrA cC* 15 30 49.8226065960 -65 35 57.574567209   8.61 7.80     F8II 47 0
51 V* AR Ser RR* 15 33 30.8124272096 +02 46 37.887440390   11.92 11.85     F3 65 0
52 V* SY Nor cC* 15 54 42.8119796279 -54 33 59.157757941   11.0 9.63   7.928 F9Ib+B4.5V 83 1
53 V* BX Dra RR* 16 06 17.3672247442 +62 45 46.089700113   11.00 10.62     A3 53 0
54 V* S Nor cC* 16 18 51.8313333962 -57 53 59.253617873 8.15 7.49 6.49   5.427 F8/G0Ib 336 1
55 V* UV Oct RR* 16 32 25.5362144318 -83 54 10.494808743   9.80 9.44     A8/F0Ia/ab(w) 100 0
56 V* V636 Sco cC* 17 22 46.4807689518 -45 36 51.402120969   7.67 6.74   5.654 F7/8Ib/II 140 1
57 V* V950 Sco cC* 17 37 37.5618771448 -40 48 48.753152900   7.99 7.26     F6Ib/II 61 0
58 V* X Sgr cC* 17 47 33.6241002643 -27 49 50.848981593 5.84 5.34 4.54 6.03 3.661 F7II 305 0
59 OGLE BLG-ECL-108266 RR* 17 47 38.2072770984 -35 31 07.161960373     17.079   15.734 ~ 29 0
60 * gam01 Sgr cC* 18 05 01.2265190155 -29 34 48.303215344 5.99 5.47 4.69   3.869 G0Ib/II 324 0
61 V* CR Ser cC* 18 10 02.1321123582 -13 32 45.475786862   12.90 10.84     G5 57 0
62 V* Y Sgr cC* 18 21 22.9864295 -18 51 36.001763 7.31 6.69 5.75   4.810 F8II 267 0
63 V* HI Dra RR* 18 33 24.3609295745 +58 42 23.346273453   9.30 9.01     F8 20 0
64 V* Y Sct cC* 18 38 03.3063888003 -08 22 08.162027440   11.2 9.69     F7 113 0
65 V* RU Sct cC* 18 41 56.3817508914 -04 06 38.375080426   10.17 8.82     G5 180 0
66 V* HN Dra RR* 18 44 53.1329307292 +57 05 17.141320533   8.45 8.07     F2 15 0
67 V* V350 Sgr cC* 18 45 17.4962010593 -20 38 50.571706956   8.321 7.450 8.41 6.421 F8Ib/II 191 0
68 V* FF Aql cC* 18 58 14.7482217777 +17 21 39.295590199 6.61 6.18 5.38     F6Ib 338 0
69 2MASS J19020609+3804407 RR* 19 02 06.0890951308 +38 04 40.849760711           ~ 4 0
70 V* SZ Aql cC* 19 04 39.4159911509 +01 18 22.156017960   9.92 7.92   7.039 F8/G0Ib 170 0
71 V* TT Aql cC* 19 08 13.7497120770 +01 17 55.146226298 8.96 7.86 6.50   5.699 G0/2Ib 254 0
72 V* V496 Aql cC* 19 08 20.7712150568 -07 26 15.882592498   8.88 7.79     F8/G0Iab/b 158 0
73 V* RR Lyr RR* 19 25 27.9123232234 +42 47 03.690634101   7.36   7.6   A8-F7 880 0
74 V* U Aql cC* 19 29 21.36028 -07 02 38.7099 8.41 7.71 6.61   5.270 F5I/II+B9.8V 258 0
75 V* U Vul cC* 19 36 37.7280897633 +20 19 58.569232928   8.368 7.162   5.556 F8Iab 206 0
76 V* SU Cyg cC* 19 44 48.7364497912 +29 15 52.894148064 7.10 6.88 6.44 6.06 5.84 F2Iab:+B8.0V 279 1
77 * eta Aql cC* 19 52 28.3677478 +01 00 20.369619 5.12 4.61 3.80   3.030 F6Iab+B9.8V 632 0
78 * 10 Sge cC* 19 56 01.2614273274 +16 38 05.236276391 6.45 6.03 5.36 6.81 4.789 F7Ib 324 0
79 V* MW Cyg cC* 20 12 22.8297860287 +32 52 17.840728795   10.71 9.45   7.882 F8.5-G2Ib 101 0
80 V* V495 Cyg cC* 20 15 58.3271220096 +35 00 53.004621313   12.01 10.75     ~ 40 0
81 * 43 Cyg gD* 20 27 02.2677205309 +49 23 00.097973075   6.024 5.715     F0V: 50 0
82 V* V520 Cyg cC* 20 54 57.5309571381 +47 32 01.690667585   12.10 10.89     G0 43 0
83 V* V1334 Cyg cC* 21 19 22.1772463169 +38 14 14.867388528   6.364 5.882     F1II+B7.0V 173 1
84 V* V532 Cyg cC* 21 20 32.9004138272 +45 28 03.017255074   10.08 9.11     F5 101 0
85 V* VZ Cyg cC* 21 51 41.4415144699 +43 08 02.538005456   10.02 8.60   7.948 G0 152 0
86 V* BG Lac cC* 22 00 25.1468672171 +43 26 43.329596739   9.33 8.59   7.793 G0.7 134 0
87 V* CZ Lac RR* 22 19 30.7340413018 +51 28 14.820148426   11.10       F1 72 0
88 * del Cep cC* 22 29 10.2650184 +58 24 54.713856 4.71 4.35 3.75   3.219 F5Iab:+B7-8 676 0
89 V* Z Lac cC* 22 40 52.1456104219 +56 49 46.083960286   9.71 8.57   7.164 F6Ib 206 0
90 V* DN Aqr RR* 23 19 17.2014545555 -24 12 58.822205537   11.713 11.318     F6.2 69 0
91 V* AT And RR* 23 42 30.8403486597 +43 00 51.687778650   11.14 10.60     F2.5 80 0
92 NAME Local Group GrG ~ ~           ~ 6970 0

    Equat.    Gal    SGal    Ecl

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2020.07.04-05:35:58

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