2008A&A...489.1441R


C.D.S. - SIMBAD4 rel 1.7 - 2020.03.29CEST21:23:46

2008A&A...489.1441R - Astronomy and Astrophysics, volume 489, 1441-1453 (2008/10-3)

Milliarcsecond angular resolution of reddened stellar sources in the vicinity of the Galactic center. II. Additional observations.

RICHICHI A., FORS O. and MASON E.

Abstract (from CDS):

Interstellar extinction in the inner regions of the Galactic bulge amounts to tens of magnitudes at visual wavelengths. As a consequence, the majority of sources in that area are poorly studied and large numbers of potentially interesting sources such as late-type giants with circumstellar shells, stellar masers and infrared stars, remain excluded from the typical investigations that are carried out in less problematic regions. Also undetected are a large numbers of binaries. We present lunar occultation (LO) observations obtained in August 2006 with the recently demonstrated burst mode of the ISAAC instrument at the ESO VLT. The results presented here follow the previously reported observations carried out in March 2006 on a similar but unrelated set of sources. By observing LO events in this region, we gain the means to investigate at least a selected number of sources with an unprecedented combination of sensitivity and angular resolution. The LO technique permits milliarcsecond resolution with a sensitivity of K≃12mag at a very large telescope. We used the opportunity of a favorable passage of the Moon over a crowded region in the general direction of the Galactic center to observe 78 LO events of heavily reddened stellar sources. We detected six new binary and one triple star, with typical projected separation of ≃0.01". We also detected the compact circumstellar emission around one maser and one central star of a planetary nebula. We measured the diameter and/or circumstellar shell of two carbon stars and other IR sources. We used the upper limits on the size of about 60 unresolved or marginally resolved sources to confirm the performance of the method. In agreement with our previous result, we conclude that lunar occultations in fast read-out mode on a detector subwindow at an 8 m-class telescope can achieve an angular resolution close to 0.001" with a sensitivity K≃12mag.

Abstract Copyright:

Journal keyword(s): techniques: high angular resolution - astrometry - occultations - stars: binaries: general - stars: carbon - masers

Status at CDS:  

Simbad objects: 80

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Number of rows : 80

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 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11305 0
2 2MASS J17455299-2833479 IR 17 45 53.00 -28 33 48.0           ~ 1 0
3 2MASS J17461267-2848121 LP* 17 46 12.68 -28 48 12.1           ~ 2 0
4 ISOGAL-P J174728.6-282556 AB* 17 47 28.55256 -28 25 56.3376           O-rich 4 0
5 2MASS J17474310-2850553 IR 17 47 43.1044291113 -28 50 55.271278791         14.88 ~ 1 0
6 2MASS J17474895-2835083 * 17 47 48.9538276204 -28 35 08.288774475         10.91 ~ 3 0
7 [RHI84] 10-640 * 17 47 52.6651027933 -28 42 52.824955067     13.40     M4 3 0
8 ISOGAL-P J174913.4-282308 AB* 17 49 13.39056 -28 23 08.9880           O-rich 4 0
9 2MASS J17491814-2839483 IR 17 49 18.14 -28 39 48.4           ~ 2 0
10 [RHI84] 10-731 * 17 49 22.3149797480 -28 30 32.521702138     16.00     M7 2 0
11 [RHI84] 10-738 * 17 49 28.0377739469 -28 45 25.487135432     15.40     M6 2 0
12 [RHI84] 10-750 * 17 49 41.2071906543 -28 36 36.103104162     14.10   10.01 M6 3 0
13 IRAS 17467-2839 * 17 49 54.65 -28 39 59.4           ~ 1 0
14 2MASS J17500552-2839384 IR 17 50 05.52 -28 39 38.5         15.44 ~ 1 0
15 2MASS J17500584-2844582 IR 17 50 05.8472304584 -28 44 58.343324813         15.59 ~ 1 0
16 [RHI84] 10-781 * 17 50 09.5994573562 -28 29 49.879316914     15.00   9.55 M6 2 0
17 [RHI84] 10-792 * 17 50 16.7632824299 -28 27 00.762173874     11.50   8.86 M2 3 0
18 IRAS 17472-2842 * 17 50 24.19 -28 43 49.5           ~ 4 0
19 2MASS J17503131-2839110 IR 17 50 31.31 -28 39 11.0           ~ 1 0
20 2MASS J17503361-2827556 IR 17 50 33.62 -28 27 55.7           ~ 2 0
21 2MASS J17505456-2828313 IR 17 50 54.5608137301 -28 28 31.341174626         14.49 ~ 2 0
22 2MASS J17505555-2850170 IR 17 50 55.55 -28 50 17.1         12.01 ~ 1 0
23 TYC 6840-291-1 * 17 50 56.2999067262 -28 23 47.616929686   12.56 10.65   8.74 ~ 1 0
24 HD 162204 PM* 17 51 03.4922042717 -28 39 34.973459685   10.01 8.65     K2/3III 4 0
25 IRAS 17479-2828 * 17 51 08.69 -28 29 38.1         16.12 ~ 3 0
26 OH 1.1 -0.8 OH* 17 51 26.777 -28 25 37.13           O-rich 39 1
27 2MASS J17513148-2841473 IR 17 51 31.4762934182 -28 41 47.318018423         13.20 ~ 2 0
28 [RHI84] 10-832 * 17 51 40.0227072862 -28 40 03.016771707     13.90 12.78 9.20 M7 2 0
29 2MASS J17514339-2825469 * 17 51 43.4035706059 -28 25 47.088284326         8.87 ~ 1 0
30 2MASS J17515263-2837145 IR 17 51 52.6362962262 -28 37 14.482494223         10.04 ~ 2 0
31 HD 316515 * 17 52 10.8078090527 -28 27 04.081230141   10.39 8.44     M2 7 0
32 IRAS 17491-2826 * 17 52 17.9249603747 -28 27 10.532708707         9.91 ~ 2 0
33 [RHI84] 10-850 * 17 52 23.5897480445 -28 40 28.041183654     12.70   9.06 M6 3 0
34 2MASS J17523994-2829496 IR 17 52 39.94 -28 29 49.7         16.68 ~ 1 0
35 IRAS 17496-2846 * 17 52 46.8680604826 -28 47 20.936126052         14.66 ~ 1 0
36 2MASS J17524903-2822586 IR 17 52 49.0241968724 -28 22 58.748749616         8.48 ~ 1 0
37 2MASS J17530735-2837221 * 17 53 07.3629613438 -28 37 22.196625267         8.74 ~ 2 0
38 [W71b] 154-01 C* 17 53 18.1629568191 -28 49 49.346794280           C 7 0
39 2MASS J17532347-2842169 IR 17 53 23.4649358207 -28 42 17.049108797         14.50 ~ 2 0
40 HD 162761 * 17 53 48.1778849193 -28 41 18.588342862   8.97 7.88     K0III 4 0
41 HD 316529 * 17 54 04.6091792701 -28 37 58.663553704   12.1       A3 3 0
42 IRC -30330 Mi* 17 54 08.9219932427 -28 20 12.408095026     15 13.5 11.14 M8+: 10 0
43 2MASS J17540910-2848537 * 17 54 09.1036051939 -28 48 53.724281967       10.72 8.87 ~ 1 0
44 IRAS 17510-2833 * 17 54 12.8479386430 -28 33 52.068028825         11.37 ~ 1 0
45 2MASS J17541404-2841522 IR 17 54 14.0507306602 -28 41 52.325522682         13.02 ~ 1 0
46 2MASS J17542808-2839433 IR 17 54 28.0946103191 -28 39 43.332162023         10.04 ~ 2 0
47 2MASS J17544350-2840095 IR 17 54 43.5067083296 -28 40 09.519330236         9.47 ~ 1 0
48 2MASS J17545806-2840144 IR 17 54 58.0535467487 -28 40 14.514130048           ~ 1 0
49 2MASS J17550580-2840545 IR 17 55 05.81 -28 40 54.6         14.24 ~ 1 0
50 IRAS 17519-2825 * 17 55 08.0213622362 -28 25 38.212769128         12.19 ~ 5 0
51 2MASS J17552720-2818529 * 17 55 27.2007598556 -28 18 53.007041428       11.97 9.46 ~ 2 0
52 IRAS 17524-2840 * 17 55 35.0749532197 -28 41 15.010934883         13.74 ~ 6 0
53 TYC 6853-2753-1 * 17 55 49.2131965871 -28 34 29.738187824   12.73 10.72   9.21 ~ 1 0
54 IRAS 17529-2830 * 17 56 09.02 -28 30 50.1         10.89 ~ 3 0
55 IRAS 17530-2813 * 17 56 13.7573813753 -28 14 08.654188248         16.72 ~ 3 0
56 IRAS 17530-2833 * 17 56 14.283 -28 33 29.67           ~ 3 0
57 IRAS 17530-2823 Mi* 17 56 15.2503690272 -28 23 30.937689492         16.407 ~ 3 0
58 2MASS J17562427-2838087 IR 17 56 24.2689343494 -28 38 08.773735788         11.09 ~ 1 0
59 2MASS J17564358-2836300 * 17 56 43.5834600109 -28 36 29.884122269         8.70 ~ 2 0
60 2MASS J17571303-2820270 IR 17 57 13.0134202391 -28 20 27.126193872         9.49 ~ 2 0
61 2MASS J17571542-2833045 IR 17 57 15.4438960218 -28 33 04.441690990         10.84 ~ 1 0
62 OGLE BLG-LPV-142270 Mi* 17 57 40.9511008598 -28 14 00.609664607     20.660   12.73 ~ 3 0
63 OGLE BLG-LPV-142638 Mi* 17 57 43.3220499379 -28 24 26.675711088     21.122   16.754 ~ 2 0
64 HD 163517 * 17 57 44.4516151049 -28 34 13.428229292   10.20 8.66     K5(III) 4 0
65 2MASS J17575012-2817035 IR 17 57 50.13 -28 17 03.5         11.40 ~ 1 0
66 2MASS J17575952-2825406 IR 17 57 59.5336955790 -28 25 40.569863364         11.71 ~ 1 0
67 2MASS J17580464-2812540 IR 17 58 04.6381635758 -28 12 54.204526115         10.83 ~ 1 0
68 2MASS J17580636-2815241 IR 17 58 06.3664762922 -28 15 24.289225896           ~ 1 0
69 PN H 1-45 Mi* 17 58 21.8672734582 -28 14 52.207767237     15.602   12.494 ~ 66 0
70 2MASS J17583142-2836286 IR 17 58 31.4157881526 -28 36 28.706329546           ~ 2 0
71 IRAS 17555-2812 LP? 17 58 40.7184516232 -28 12 24.208941213           ~ 3 0
72 IRAS 17556-2830 Mi* 17 58 53.4233298758 -28 30 47.062573561     21.316   14.61 ~ 7 0
73 OGLE BLG-LPV-157182 LP* 17 59 04.1432945992 -28 09 07.547100881     19.988   13.039 ~ 3 0
74 2MASS J17590610-2831173 IR 17 59 06.10 -28 31 17.3           ~ 2 0
75 IRAS 17560-2816 Mi* 17 59 13.09008 -28 16 39.8604         16.769 ~ 6 0
76 2MASS J17595541-2809020 IR 17 59 55.4215788285 -28 09 02.015600943         9.14 ~ 2 0
77 IRAS 17571-2813 Mi* 18 00 20.9020085069 -28 13 37.129793763         10.83 ~ 2 0
78 IRAS 17575-2823 * 18 00 44.9981653966 -28 23 12.077663412           ~ 1 0
79 IRAS 17579-2826 Mi* 18 01 04.61712 -28 26 44.2788     20.424   18.71 ~ 3 0
80 NAME Galactic Bulge reg ~ ~           ~ 3322 0

    Equat.    Gal    SGal    Ecl

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2020.03.29-21:23:46

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