2014A&A...570A.127M


Query : 2014A&A...570A.127M

2014A&A...570A.127M - Astronomy and Astrophysics, volume 570A, 127-127 (2014/10-1)

Searching for faint companions with VLTI/PIONIER. II. 92 main sequence stars from the Exozodi survey.

MARION L., ABSIL O., ERTEL S., LE BOUQUIN J.-B., AUGEREAU J.-C., BLIND N., DEFRERE D., LEBRETON J. and MILLI J.

Abstract (from CDS):

The Exozodi survey aims to determine the occurrence rate of bright exozodiacal discs around nearby main sequence stars using infrared interferometry. Although the Exozodi survey targets have been carefully selected to avoid the presence of binary stars, the results of this survey can still be biased by the presence of unidentified stellar companions. Using the PIONIER data set collected within the Exozodi survey in 2012, we aim to search for the signature of point-like companions around the Exozodi target stars. We make use of both the closure phases and squared visibilities collected by PIONIER to search for companions within the ∼100mas interferometric field of view. The presence of a companion is assessed by computing the goodness of fit to the data for a series of binary models with various separations and contrasts. Five stellar companions are resolved for the first time around five A-type stars: HD 4150, HD 16555, HD 29388, HD 202730, and HD 224392 (although the companion to HD 16555 was independently resolved by speckle interferometry while we were carrying out the survey). In the most likely case of main sequence companions, their spectral types range from A5V to K4V. Three of these stars were already suspected to be binaries from Hipparcos astrometric measurements, although no information was available on the companions themselves so far. In addition to debiasing the statistics of the Exozodi survey, these results can also be used to revise the fraction of visual binaries among A-type stars, suggesting that an extra ∼13% A-type stars are visual binaries in addition to the ones detected in previous direct imaging surveys. We estimate that about half the population of nearby A-type stars could be resolved as visual binaries using a combination of state-of-the-art interferometry and single-aperture imaging, and we suggest that a significant fraction of these binaries remains undetected to date.

Abstract Copyright:

Journal keyword(s): binaries: close - circumstellar matter - techniques: interferometric

Simbad objects: 94

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Number of rows : 94
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 HD 142 PM* 00 06 19.1753245111 -49 04 30.671249608   6.30 5.76     F7V 250 1
2 * zet Tuc PM* 00 20 04.2586334956 -64 52 29.257190108 4.82 4.80 4.23 3.73 3.40 F9.5V 380 0
3 * kap Phe PM* 00 26 12.2013436436 -43 40 47.390371480 4.22 4.11 3.94 3.78 3.70 A5IVn 152 0
4 * lam02 Phe PM* 00 35 41.1754684944 -48 00 03.264963408   5.948 5.510     F5V+ 71 0
5 HD 3823 PM* 00 40 25.6698671445 -59 27 16.566549816   6.44 5.90     G0VFe-0.9CH-0.4 171 0
6 * eta Phe dS* 00 43 21.2101237138 -57 27 47.028593879   4.350 4.361     A0IV 95 0
7 * nu. Phe PM* 01 15 11.1214282378 -45 31 53.992580679 5.65 5.54 4.96 4.47 4.11 F9VFe+0.4 257 0
8 * kap Tuc ** 01 15 46.16226 -68 52 33.3356   4.73 4.25 4.82   F6V+K1V 123 0
9 * q01 Eri PM* 01 42 29.3145176952 -53 44 26.991453264   6.05 5.52     F9V 325 1
10 * chi Cet PM* 01 49 35.1027660619 -10 41 11.070999501 5.04 5.00 4.68 4.38 4.22 F0V 201 0
11 HD 14412 PM* 02 18 58.5047816166 -25 56 44.473793228   7.07 6.34     G8V 221 0
12 * del Hyi PM* 02 21 44.9423652192 -68 39 33.906922488 4.17 4.12 4.09 4.05 4.04 A2V 111 0
13 * sig Cet ** 02 32 05.1877984910 -15 14 41.653561505 5.19 5.20 4.75 4.34 4.07 F5V 205 0
14 * eta Hor ** 02 37 24.3486279936 -52 32 35.192050404   5.569 5.293     A6V 80 0
15 * iot Hor PM* 02 42 33.4666679022 -50 48 01.055138166   5.97 5.40     F8V 395 1
16 HD 17925 RS* 02 52 32.1281856011 -12 46 10.968056223 7.48 6.91 6.05 5.34 4.89 K1V 514 0
17 * rho03 Eri PM* 03 04 16.5168842952 -07 36 03.078421848   5.46 5.30     A5V 69 0
18 * zet01 Ret PM* 03 17 46.1634549490 -62 34 31.152456644 6.24 6.18 5.54 5.00 4.66 G2.5VHdel1 295 0
19 * zet02 Ret ** 03 18 12.8188824117 -62 30 22.904711032   5.814 5.228     G1V 362 0
20 * e Eri PM* 03 19 55.6509122226 -43 04 11.215188426 5.20 4.98 4.27 3.65 3.25 G6V 450 1
21 * kap Ret PM* 03 29 22.6774206459 -62 56 15.104181615   5.10 4.71     F3IV/V 168 1
22 * del Eri PM* 03 43 14.9005379551 -09 45 48.210955899 5.13 4.46 3.54 2.82 2.32 K0+IV 600 0
23 HD 25457 TT* 04 02 36.7442719512 -00 16 08.119921152   5.88 5.38     F7V 265 0
24 * b Tau PM* 04 28 50.1636212976 +13 02 51.367198596   5.226 5.014 4.907 4.795 kA5hF0VmF0 195 0
25 Cl Melotte 25 OpC 04 29 47.3 +16 56 53           ~ 3082 0
26 * c Tau BS? 04 38 09.4618938672 +12 30 39.013056648 4.52 4.39 4.27 4.13 4.08 A6V 195 0
27 * 58 Eri BY* 04 47 36.2917029384 -16 56 04.040472552   6.14 5.50     G2.5IV-V 428 0
28 * pi.01 Ori PM* 04 54 53.7280989194 +10 09 03.003446941   4.723 4.648     A0Va_lB 258 0
29 HD 31925 ** 04 59 01.36250 -16 22 33.6890           hF5gF5mF3 86 0
30 * zet Dor PM* 05 05 30.6556741368 -57 28 21.736898832   5.215 4.708     F9VFe-0.5 240 0
31 * bet Eri PM* 05 07 50.9748851089 -05 05 11.389142292 3.02 2.92 2.79 2.65 2.57 A3IV 222 0
32 HD 34721 PM* 05 18 50.4728918171 -18 07 48.185476698   6.51 5.96     G0V 133 0
33 * bet Pic PM* 05 47 17.0876901 -51 03 59.441135 4.13 4.03 3.86 3.74 3.58 A6V 1908 1
34 HD 38858 PM* 05 48 34.9402551240 -04 05 40.721787744 6.71 6.61 5.97     G2V 304 1
35 HD 40307 PM* 05 54 04.2405000288 -60 01 24.493007640 8.814 8.097 7.147 6.597 6.119 K2.5V 264 1
36 HD 43162 LM* 06 13 45.2953762392 -23 51 42.971547996   7.068 6.366 5.94 5.61 G6.5V 176 0
37 HD 45184 PM* 06 24 43.8795895848 -28 46 48.415725948   7.01 6.39 6.24 8.94 G2Va 205 1
38 HD 53705 PM* 07 03 57.3152216292 -43 36 28.925859669   5.94 5.28 5.05 4.71 G1.5V 195 0
39 * lam Gem PM* 07 18 05.5789195368 +16 32 25.389581244   3.674 3.559     A4IV 255 0
40 HD 69830 PM* 08 18 23.9469682407 -12 37 55.817187530   6.74 5.95     G8:V 527 1
41 * 30 Mon PM* 08 25 39.6318651278 -03 54 23.137987255 3.85 3.88 3.90 3.87 3.92 A0Va 278 0
42 HD 72673 PM* 08 32 51.4956803280 -31 30 03.064960317   7.17 6.38     K1V 214 0
43 HD 76151 PM* 08 54 17.9470964696 -05 26 04.054298491 6.89 6.67 6.00     G2V 532 0
44 HD 76932 PM* 08 58 43.9327642391 -16 07 57.817644364 6.47 6.39 5.86     G2VFe-1.8CH-1 404 0
45 * psi Vel ** 09 30 41.99958 -40 28 00.2616 3.89 3.96 3.60 3.24 3.02 F3VFe-0.7 119 0
46 * q Vel PM* 10 14 44.1556880397 -42 07 18.988830783 3.98 3.90 3.85 3.83 3.81 A2Va 136 0
47 HD 90132 PM* 10 23 29.2960770216 -38 00 35.425518588   5.564 5.329     A8V 71 0
48 * Y Vel PM* 10 31 21.8208713206 -53 42 55.740987419   5.39 4.89     F9VFe-0.8CH-0.7 157 0
49 * gam Crt PM* 11 24 52.9236160183 -17 41 02.442764421   4.25 4.06 6.12   A7V(n) 131 0
50 HD 102365 PM* 11 46 31.0725331317 -40 30 01.285867174 5.65 5.55 4.88 4.35 3.97 G2V 332 1
51 HD 104731 PM* 12 03 39.5724147833 -42 26 02.610414638 5.53 5.56 5.15     F5V 137 0
52 * del Crv PM* 12 29 51.8551642 -16 30 55.552542 2.80 2.89 2.94 2.99 3.03 A0IV(n)kB9 206 0
53 * tau Cen PM* 12 37 42.1640998080 -48 32 28.699293408 3.94 3.91 3.86 3.81 3.77 A1IVnn 107 0
54 * 61 Vir PM* 13 18 24.3139864471 -18 18 40.297748582 5.710 5.440 4.740     G6.5V 675 1
55 * tau Boo Ro* 13 47 15.7381720026 +17 27 24.809555600 5.02 4.98 4.49 4.09 3.85 F7IV-V 989 1
56 * alf Cir a2* 14 42 30.4206520931 -64 58 30.478845491 3.55 3.43 3.19 2.96 2.86 A7VpSrCrEu 365 0
57 * mu. Vir PM* 14 43 03.6239867612 -05 39 29.524956308 4.25 4.26 3.88 3.48 3.26 F2V 228 0
58 * 109 Vir PM* 14 46 14.9234473441 +01 53 34.381780831 3.69 3.72 3.73 3.66 3.68 A0IIInn 337 0
59 * c Boo PM* 15 07 18.0659348352 +24 52 09.099406380 5.34 5.36 4.93 4.53 4.32 F5V 355 0
60 * bet Cir PM* 15 17 30.8494520580 -58 48 04.345266926   4.153 4.057     A3Va 128 0
61 * 5 Ser Ro* 15 19 18.7974409923 +01 45 55.466382064   5.60   4.8   F8IV 340 0
62 * g Lup PM* 15 41 11.3768069149 -44 39 40.341696305   5.036 4.633     F3/5V 202 0
63 * bet TrA PM* 15 55 08.5620636 -63 25 50.615531 3.19 3.14 2.85 2.53 2.38 F1V 162 0
64 * 12 Oph BY* 16 36 21.4496896968 -02 19 28.513024233 7.00 6.55 5.77 5.13 4.74 K1V 487 0
65 HD 152391 PM* 16 52 58.8025159848 -00 01 35.118396116   7.40 6.64     G8.5Vk: 373 0
66 * lam Ara PM* 17 40 23.8255785576 -49 24 56.099256516   5.17 4.77     F4V 118 0
67 * 58 Oph PM* 17 43 25.7935382141 -21 40 59.498912759   5.313 4.861     F5V 146 0
68 * zet Ser PM* 18 00 29.0100539320 -03 41 24.977568563   4.982 4.616     F2V 193 0
69 * 72 Oph PM* 18 07 20.9848472070 +09 33 49.848215907 3.95 3.85 3.73 3.59 3.54 A5V 145 0
70 HD 172555 PM* 18 45 26.9009806435 -64 52 16.534807985   4.967 4.767     A7V 278 0
71 * alf CrA PM* 19 09 28.3415149600 -37 54 16.107840507   4.146 4.087     A2Va 115 0
72 * b Aql PM* 19 24 58.1999714302 +11 56 39.888480530 6.35 5.93   4.7   G7IVHdel1 491 0
73 * eps Pav PM* 20 00 35.5515303087 -72 54 37.812955563   3.927 3.940     A0Va 131 0
74 * rho Aql PM* 20 14 16.6186826232 +15 11 51.386417088   5.006 4.946     A1Va 130 0
75 * phi01 Pav PM* 20 35 34.8500676912 -60 34 54.296843484   5.036 4.745     F0V 82 0
76 * eta Ind dS* 20 44 02.3339803529 -51 55 15.493271117   4.767 4.495     A9IV 87 0
77 * psi Cap PM* 20 46 05.7329952443 -25 16 15.233491015   4.538 4.122     F5V 216 0
78 * tet Ind B PM* 21 19 51.1975391304 -53 26 57.829920576   7.43 6.867     G0V 7 0
79 * tet Ind ** 21 19 51.9894566760 -53 26 57.933870576   4.641 4.483 5.82   A5IV-V 86 0
80 * gam Pav PM* 21 26 26.6049826473 -65 21 58.313057521 4.57 4.70 4.22 3.75 3.45 F9VFe-1.4CH-0.7 412 0
81 V* HN Peg BY* 21 44 31.3299461136 +14 46 18.983292600       6.16   G0V+ 516 0
82 HD 207129 PM* 21 48 15.7511634187 -47 18 13.017893348   6.18 5.58     G2V 329 0
83 * mu. PsA PM* 22 08 23.0113421424 -32 59 18.491668224 4.60 4.55 4.50 4.43 4.38 A1.5IVn 126 0
84 HD 210277 PM* 22 09 29.8657847411 -07 32 55.162082226   8.85 8.57 7.36   G8V 341 1
85 * tau PsA PM* 22 10 08.7801946925 -32 32 54.270294310   5.40 4.92     F6V 153 0
86 * tet Peg PM* 22 10 11.9886121211 +06 11 52.517717538 3.72 3.62 3.55 3.50 3.46 A1Va 187 0
87 * ups Aqr PM* 22 34 41.6357860992 -20 42 29.576916972   5.637 5.203     F7V 133 0
88 HD 214953 PM* 22 42 36.8833459086 -47 12 38.925760753 6.64 6.67 6.06 7.11   F9.5V 152 0
89 * ksi Peg PM* 22 46 41.5798542334 +12 10 22.388860108 4.66 4.69 4.20 3.73 3.42 F6V 386 0
90 * eps Gru SB* 22 48 33.2980615128 -51 19 00.713323272   3.556 3.466     A2IVn 130 0
91 * tau01 Gru PM* 22 53 37.9323502176 -48 35 53.823928380 6.85 6.66 6.04     G0V 204 1
92 HD 219482 PM* 23 16 57.6874876272 -62 00 04.312068048   6.146 5.647     F6V 122 0
93 * gam Tuc PM* 23 17 25.7564454336 -58 14 08.524954176 4.35 4.37 3.98 3.57 3.33 F4V 158 0
94 * eta Tuc ** 23 57 35.0786487048 -64 17 53.627347464   5.046 4.989     A1V 87 0

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