2015ApJ...809...10Y


Query : 2015ApJ...809...10Y

2015ApJ...809...10Y - Astrophys. J., 809, 10 (2015/August-8)

Compact radio sources within 30" of Sgr A*: proper motions, stellar winds, and the accretion rate onto Sgr A*.

YUSEF-ZADEH F., BUSHOUSE H., SCHODEL R., WARDLE M., COTTON W., ROBERTS D.A., NOGUERAS-LARA F. and GALLEGO-CANO E.

Abstract (from CDS):

Recent broadband 34 and 44 GHz radio continuum observations of the Galactic center have revealed 41 massive stars identified with near-IR (NIR) counterparts, as well as 44 proplyd candidates within 30'' of Sgr A*. Radio observations obtained in 2011 and 2014 have been used to derive proper motions of eight young stars near Sgr A*. The accuracy of proper motion estimates based on NIR observations by Lu et al. and Paumard et al. have been investigated by using their proper motions to predict the 2014 epoch positions of NIR stars and comparing the predicted positions with those of radio counterparts in the 2014 radio observations. Predicted positions from Lu et al. show an rms scatter of 6 mas relative to the radio positions, while those from Paumard et al. show rms residuals of 20 mas. We also determine the mass-loss rates of 11 radio stars, finding rates that are on average ∼2 times smaller than those determined from model atmosphere calculations and NIR data. Clumpiness of ionized winds would reduce the mass loss rate of WR and O stars by additional factors of 3 and 10, respectively. One important implication of this is a reduction in the expected mass accretion rate onto Sgr A* from stellar winds by nearly an order of magnitude to a value of a few ×10–7M yr–1. Finally, we present the positions of 318 compact radio sources within 30'' of Sgr A*, 45 of which have stellar counterparts in the NIR Ks (2.18 µm) and L' (3.8 µm) bands.

Abstract Copyright: © 2015. The American Astronomical Society. All rights reserved.

Journal keyword(s): accretion, accretion disks - black hole physics - Galaxy: center

VizieR on-line data: <Available at CDS (J/ApJ/809/10): table6.dat>

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 50

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Number of rows : 50
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4059 2
2 QSO B1730-130 QSO 17 33 02.7055087032 -13 04 49.545516612   18 18.5 18.78 17.39 ~ 1058 1
3 QSO J1744-3116 Bla 17 44 23.57824 -31 16 36.2943           ~ 138 1
4 [PGM2006] E81 WR* 17 45 39.30 -29 00 30.7           WN7 10 0
5 [BSD96] 22 WR* 17 45 39.38 -29 00 33.4           WC8/9 27 0
6 NAME Sgr A West HII 17 45 39.4 -29 00 24           ~ 364 0
7 [BSD96] 29 WR* 17 45 39.46 -29 00 31.7           WN8 28 0
8 [BSD96] 33 WR* 17 45 39.54 -29 00 35.0           Ofpe/WN9 40 0
9 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 12903 0
10 GCIRS 13E Cl* 17 45 39.73 -29 00 29.7           WN9 110 0
11 GCIRS 34W WR* 17 45 39.73 -29 00 26.6           Ofpe/WN9 56 0
12 GCIRS 7SW WR* 17 45 39.74 -29 00 23.3           WN8 16 0
13 GCIRS 34NW WR* 17 45 39.749 -29 00 25.36           WN7 19 0
14 GCIRS 13 Em* 17 45 39.76 -29 00 29.8           ~ 133 0
15 GCIRS 3 * 17 45 39.80 -29 00 23.9           ~ 142 0
16 GCIRS 13E2 WR* 17 45 39.8006 -29 00 29.819           WN8 42 0
17 GCIRS 13N * 17 45 39.812 -29 00 29.16           ~ 37 0
18 GCIRS 12N * 17 45 39.86 -29 00 35.7           M0III 56 0
19 GCIRS 3E WR* 17 45 39.869 -29 00 24.32           WC5/6 17 0
20 [GEO97] W14 WR* 17 45 39.9190 -29 00 28.592           O8.5/9.5I? 18 0
21 GCIRS 29 IR 17 45 39.919 -29 00 26.86           ~ 26 0
22 GCIRS 15SW WR* 17 45 39.92 -29 00 18.1           WN8/WC9 36 0
23 GCIRS 33SW * 17 45 39.94 -29 00 31.0           ~ 8 0
24 GCIRS 7 * 17 45 39.987 -29 00 22.24           M2 356 0
25 GCIRS 16 Cl* 17 45 40.0 -29 00 28           ~ 329 0
26 GCIRS 33SE Em* 17 45 40.02 -29 00 31.0           Ofpe/WN9 24 0
27 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 3865 3
28 [EG97] S2 * 17 45 40.0442 -29 00 27.975           B0/2V 324 1
29 GCIRS 16NW WR* 17 45 40.0451 -29 00 26.847           Ofpe/WN9 129 0
30 GCIRS 33E WR* 17 45 40.0941 -29 00 31.213           Ofpe/WN9 53 0
31 GCIRS 16C WR* 17 45 40.12 -29 00 27.6           Ofpe/WN9 175 1
32 GCIRS 16SW WR* 17 45 40.1245 -29 00 29.018           Ofpe/WN9 150 0
33 GCIRS 15NE WR* 17 45 40.15 -29 00 16.5           WN8/9 55 0
34 PSR J1745-2900 Psr 17 45 40.1640 -29 00 29.818           ~ 277 0
35 GCIRS 16CC s*b 17 45 40.1939 -29 00 27.532           O9.5/B0.5I 51 0
36 GCIRS 21 WR* 17 45 40.222 -29 00 30.85           WC9 97 0
37 GCIRS 9W WR* 17 45 40.26 -29 00 33.7           WN8 30 0
38 GCIRS 35W WR* 17 45 40.26 -29 00 29.3           WN5/6 43 0
39 GCIRS 16NE WR* 17 45 40.26 -29 00 27.2           Ofpe/WN9 145 0
40 [PGM2006] E70 WR* 17 45 40.3794 -29 00 23.125           Ofpe/WN9 11 0
41 GCIRS 1W Em* 17 45 40.442 -29 00 27.51           Be? 100 0
42 GCIRS 9 LP* 17 45 40.447 -29 00 34.49           M3III 102 0
43 GCIRS 9SE WR* 17 45 40.4723 -29 00 36.299           WC9 12 0
44 [TVH89] 179 OH* 17 45 40.63 -29 00 23.5           ~ 59 0
45 GCIRS 5 * 17 45 40.700 -29 00 18.51           ~ 55 0
46 GCIRS 28 * 17 45 40.80 -29 00 33.7           M6III 38 0
47 GCIRS 17 * 17 45 41.0377 -29 00 22.611           ~ 32 0
48 GCIRS 19NW * ~ ~           ~ 12 0
49 GCIRS 7E2 * ~ ~           ~ 13 0
50 GCIRS 35 IR ~ ~           ~ 7 0

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2022.05.22-14:21:12

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