2013MNRAS.433..402A

Query : 2013MNRAS.433..402A

2013MNRAS.433..402A - Mon. Not. R. Astron. Soc., 433, 402-411 (2013/July-3)

The low-mass companion of HIP 45314 (HR 3672).

ADAM C., NEUHAUSER R., MUGRAUER M., SCHMIDT J.G. and SCHMIDT T.O.B.

Abstract (from CDS):

We report the discovery of a very low mass companion to HIP 45314 (HR 3672) located about 2.7 arcsec north-west of HR 3672 A. With four years of epoch difference between the two observations obtained with the Very Large Telescope we can reject by more than 4σ that B would be a non-moving background object unrelated to A. HR 3672 A is a B 7-8 main-sequence star with an age of 140±80Myr and from the magnitude difference between HR 3672 A and B and the Two Micron All Sky Survey magnitudes, we can estimate the magnitude of HR 3672 B (Ks = 12.42±0.28mag) and then, for age and distance of the primary star, using models, its luminosity and mass (0.2-0.5M☉). We present a reanalysis of the probable membership of HR 3672 A to the Platais 9 cluster, and introduce a new method for astrometric calibration of data without dedicated calibration images. In the deepest available image (co-add of all epochs) no additional companion candidates within 13 arcsec were detected down to 0.03M☉.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): astrometry - binaries: visual - stars: individual: HR 3672 - open clusters and associations: individual: Platais 9

Simbad objects: 44

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Number of rows : 44
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Ass Vel OB 2 As* 08 09 22.478 -47 21 03.46           ~ 307 0
2 HD 72303 a2* 08 29 29.8025103576 -54 12 42.234355404   6.32 6.44     ApSi 28 0
3 HD 73287 * 08 35 10.1225498448 -54 12 22.280828220   6.928 7.044     B7V 36 0
4 HD 73503 * 08 36 23.6131980600 -53 02 11.317774164 8.28 8.39 8.33     A0V 28 0
5 HD 73681 * 08 37 10.5918652464 -53 15 33.492742596   7.91 7.83     A1V 55 0
6 HD 73904 * 08 38 23.9105016231 -53 43 18.359686200   7.715 7.645     A2Vn 47 0
7 HD 73952 * 08 38 44.8073176272 -53 05 25.373574564   6.348 6.431     B8V 82 0
8 HD 74044 SB* 08 39 16.5285439656 -52 18 49.798934028   8.69 8.48     A3mA7-A7 63 0
9 V* HW Vel bC* 08 39 23.8445033904 -53 26 23.167592268 4.72 5.291 5.439     B5V 114 0
10 HD 74146 SB* 08 39 57.5984976576 -53 03 17.016627132 4.48 5.05 5.19     B5IV 121 0
11 HD 74196 * 08 40 17.4649643448 -53 00 55.430609904 4.97 5.47 5.61     B9/A0 144 0
12 * omi Vel Pu* 08 40 17.5993322082 -52 55 18.875623881 2.8 3.44 3.63     B3/5(V) 181 1
13 IC 2391 OpC 08 41 17.5 -53 03 00           ~ 871 0
14 HD 74516 * 08 42 09.9561714480 -52 58 03.652619016   7.40 7.38     A1V 80 0
15 HD 74561 * 08 42 18.2168005824 -53 54 08.168181408   9.76 9.32     F3V 57 0
16 V* KT Vel a2* 08 42 18.9916454899 -53 06 00.204770302 4.79 5.340 5.474     B9III(pSi) 110 0
17 HD 74560 SB* 08 42 25.3866034128 -53 06 50.343377699 3.97 4.655 4.815     B3IV 182 0
18 HD 74713 * 08 43 22.1075482368 -52 12 31.862222748   9.280 8.825     K1/2III 20 0
19 HD 74734 * 08 43 32.8220755368 -52 00 13.633748928   7.97 7.87     A1IV/V 25 0
20 HD 74883 * 08 45 10.3196063088 -41 25 37.990441740   8.71 8.76     B9V 24 0
21 HD 75083 * 08 46 17.6847047664 -42 45 31.246697520   8.67 8.75     B7/8V 41 0
22 HD 75202 * 08 46 23.1808933224 -52 50 37.386480408   7.87 7.69     A7V 58 0
23 HD 75127 ** 08 46 34.4262607944 -42 47 26.203125156   8.65 8.69     B9V 31 0
24 HD 75241 * 08 47 05.3640566952 -45 04 29.094350340 5.91 6.475 6.592     B4IV 34 0
25 Cl Trumpler 10 OpC 08 47 46.4 -42 31 52           ~ 203 0
26 HD 75324 * 08 47 47.9325714576 -42 16 22.251648216   6.99 7.12     B4V 34 0
27 HD 75466 * 08 48 00.2158168800 -52 51 00.552354084   6.186 6.266     B8V 65 0
28 HD 75387 * 08 48 08.7766833888 -42 27 48.412381248 5.43 6.24 6.42     B2V 65 0
29 HD 75549 * 08 49 03.3610019232 -43 45 40.359226788   7.189 7.313     B3V 37 0
30 HD 75948 ** 08 50 47.1019138 -54 06 46.662187           A2V 13 0
31 HD 76004 * 08 51 50.0352140688 -44 09 03.353593392   6.216 6.350     B3V 40 0
32 * lam Vel s*r 09 07 59.75787 -43 25 57.3273 5.67 3.86 2.21 0.97 0.03 K4Ib 230 0
33 Cl Platais 9 OpC 09 11 49 -43 31.8           ~ 74 0
34 HD 79416 a2* 09 12 30.5228205 -43 36 47.737095 4.98         B8V(pSi) 92 0
35 HD 79621 Be* 09 13 34.4533435512 -47 20 18.262388040 5.77 5.87 5.92     B9V 71 0
36 NAME HR 3672 B LM* 09 14 08.1 -44 08 42           ~ 1 0
37 HD 79694 Pu* 09 14 08.2100812248 -44 08 44.952535428 5.23 5.73 5.85     B7-8V 86 0
38 * z Vel * 09 14 24.4858461336 -43 13 38.961975828 4.55 5.11 5.25     B3/5V 69 0
39 HD 79901 * 09 15 03.8861865696 -48 30 13.447158948   8.92 8.85     A0V 17 0
40 HD 80817 * 09 20 33.1841698272 -44 16 59.465750700   8.12 8.03     A0V 22 0
41 HD 81276 * 09 23 10.9988421744 -44 57 54.076824648   7.99 7.93     A1V 39 0
42 HD 132347 ** 14 59 29.23211 -30 42 41.5076           A3mA5-F0 25 0
43 V* GQ Lup Or* 15 49 12.1053805848 -35 39 05.058139788 12.19 12.76 11.66 11.15   K7Ve 334 1
44 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0

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