2008A&A...489.1441R


Query : 2008A&A...489.1441R

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

Simbad objects: 80

goto Full paper

goto View the references in ADS

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 - 2022
#notes
1 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13192 0
2 2MASS J17455299-2833479 NIR 17 45 53.00 -28 33 48.0           ~ 1 0
3 2MASS J17461267-2848121 LP* 17 46 12.6703457976 -28 48 12.215132100           ~ 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 NIR 17 47 43.1039807736 -28 50 55.267174968         14.88 ~ 1 0
6 2MASS J17474895-2835083 * 17 47 48.9518585688 -28 35 08.303402976         10.91 ~ 3 0
7 [RHI84] 10-640 * 17 47 52.6650904584 -28 42 52.822461240     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 NIR 17 49 18.14 -28 39 48.4           ~ 2 0
10 2MASS J17492231-2830324 LP? 17 49 22.3147265976 -28 30 32.530061772     16.00     M7 3 0
11 [RHI84] 10-738 * 17 49 28.0366254384 -28 45 25.490762568     15.40     M6 2 0
12 [RHI84] 10-750 * 17 49 41.2064103528 -28 36 36.106982820     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 NIR 17 50 05.52 -28 39 38.5         15.44 ~ 1 0
15 2MASS J17500584-2844582 NIR 17 50 05.8494911136 -28 44 58.297154280         15.59 ~ 1 0
16 [RHI84] 10-781 * 17 50 09.5988905952 -28 29 49.879319964     15.00   9.55 M6 2 0
17 [RHI84] 10-792 * 17 50 16.7635371960 -28 27 00.753376428     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 NIR 17 50 31.31 -28 39 11.0           ~ 1 0
20 2MASS J17503361-2827556 NIR 17 50 33.62 -28 27 55.7           ~ 2 0
21 2MASS J17505456-2828313 NIR 17 50 54.5607888120 -28 28 31.352808648         14.49 ~ 2 0
22 2MASS J17505555-2850170 NIR 17 50 55.55 -28 50 17.1         12.01 ~ 1 0
23 TYC 6840-291-1 * 17 50 56.2996139544 -28 23 47.614684020   12.56 10.65   8.74 ~ 1 0
24 HD 162204 PM* 17 51 03.4924504080 -28 39 34.972934040   10.01 8.65     K2/3III 5 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 40 1
27 2MASS J17513148-2841473 NIR 17 51 31.4753365392 -28 41 47.291622000         13.20 ~ 2 0
28 [RHI84] 10-832 * 17 51 40.0183553064 -28 40 03.001271916     13.90 12.78 9.20 M7 2 0
29 2MASS J17514339-2825469 * 17 51 43.4030116440 -28 25 47.082065196         8.87 ~ 1 0
30 2MASS J17515263-2837145 NIR 17 51 52.6350624528 -28 37 14.481928812         10.04 ~ 2 0
31 HD 316515 * 17 52 10.8080487336 -28 27 04.084389360   10.39 8.44     M2 10 0
32 IRAS 17491-2826 * 17 52 17.9248865016 -28 27 10.523694996         9.91 ~ 2 0
33 [RHI84] 10-850 * 17 52 23.5890167760 -28 40 28.043170392     12.70   9.06 M6 3 0
34 2MASS J17523994-2829496 NIR 17 52 39.94 -28 29 49.7         16.68 ~ 1 0
35 IRAS 17496-2846 * 17 52 46.8712307760 -28 47 20.898093876         14.66 ~ 1 0
36 2MASS J17524903-2822586 NIR 17 52 49.0242341688 -28 22 58.742417136         8.48 ~ 1 0
37 2MASS J17530735-2837221 * 17 53 07.3622365464 -28 37 22.186805808         8.74 ~ 2 0
38 [W71b] 154-01 C* 17 53 18.1625995632 -28 49 49.337913396           C 7 0
39 2MASS J17532347-2842169 NIR 17 53 23.4655998912 -28 42 17.046184536         14.50 ~ 2 0
40 HD 162761 * 17 53 48.1779990288 -28 41 18.588491988   8.97 7.88     K0III 8 0
41 HD 316529 * 17 54 04.6093074048 -28 37 58.661362092   12.1       A3 3 0
42 IRC -30330 Mi* 17 54 08.9239602216 -28 20 12.448529628     15 13.5 11.14 M8+: 10 0
43 2MASS J17540910-2848537 * 17 54 09.1032011376 -28 48 53.718521328       10.72 8.87 ~ 1 0
44 IRAS 17510-2833 LP? 17 54 12.8473277352 -28 33 52.079365440         11.37 ~ 2 0
45 2MASS J17541404-2841522 LP? 17 54 14.0496035064 -28 41 52.317363372         13.02 ~ 2 0
46 2MASS J17542808-2839433 NIR 17 54 28.0942731816 -28 39 43.331927652         10.04 ~ 2 0
47 2MASS J17544350-2840095 NIR 17 54 43.5060053064 -28 40 09.519536100         9.47 ~ 1 0
48 2MASS J17545806-2840144 NIR 17 54 58.0537631976 -28 40 14.540169828           ~ 1 0
49 2MASS J17550580-2840545 NIR 17 55 05.81 -28 40 54.6         14.24 ~ 1 0
50 IRAS 17519-2825 * 17 55 08.0212649688 -28 25 38.207754300         12.19 ~ 5 0
51 2MASS J17552720-2818529 * 17 55 27.2002907232 -28 18 53.006911056       11.97 9.46 ~ 2 0
52 IRAS 17524-2840 * 17 55 35.0753442384 -28 41 15.021544776         13.74 ~ 6 0
53 TYC 6853-2753-1 * 17 55 49.2131406672 -28 34 29.736260760   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 13.7549541168 -28 14 08.679583644         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 NIR 17 56 24.2689799328 -28 38 08.767848156         11.09 ~ 1 0
59 2MASS J17564358-2836300 * 17 56 43.5834219384 -28 36 29.881262088         8.70 ~ 2 0
60 2MASS J17571303-2820270 NIR 17 57 13.0138682568 -28 20 27.127074840         9.49 ~ 2 0
61 2MASS J17571542-2833045 NIR 17 57 15.4429342776 -28 33 04.447430676         10.84 ~ 1 0
62 OGLE BLG-LPV-142270 Mi* 17 57 40.9500184392 -28 14 00.596291064     20.660   12.73 ~ 3 0
63 OGLE BLG-LPV-142638 Mi* 17 57 43.3240933056 -28 24 26.668445616     21.122   16.754 ~ 2 0
64 HD 163517 * 17 57 44.4514975416 -28 34 13.427062500   10.20 8.66     K5(III) 5 0
65 2MASS J17575012-2817035 NIR 17 57 50.13 -28 17 03.5         11.40 ~ 1 0
66 2MASS J17575952-2825406 LP? 17 57 59.5335178032 -28 25 40.557613080         11.71 ~ 2 0
67 2MASS J17580464-2812540 NIR 17 58 04.6384188480 -28 12 54.198620280         10.83 ~ 1 0
68 2MASS J17580636-2815241 NIR 17 58 06.3643818648 -28 15 24.273050256           ~ 1 0
69 PN H 1-45 Mi* 17 58 21.8662836432 -28 14 52.195092648     15.602   12.494 ~ 67 0
70 2MASS J17583142-2836286 NIR 17 58 31.4161194936 -28 36 28.707514776           ~ 2 0
71 IRAS 17555-2812 LP? 17 58 40.7181084528 -28 12 24.208564356           ~ 4 0
72 IRAS 17556-2830 Mi* 17 58 53.4166589304 -28 30 47.031348060     21.316   14.61 ~ 7 0
73 OGLE BLG-LPV-157182 LP* 17 59 04.1437031496 -28 09 07.547598684     19.988   13.039 ~ 3 0
74 2MASS J17590610-2831173 LP? 17 59 06.1071419891 -28 31 17.292435124           ~ 3 0
75 IRAS 17560-2816 Mi* 17 59 13.09008 -28 16 39.8604         16.769 ~ 6 0
76 2MASS J17595541-2809020 NIR 17 59 55.4210272824 -28 09 02.014092072         9.14 ~ 2 0
77 IRAS 17571-2813 Mi* 18 00 20.9002592928 -28 13 37.135101288         10.83 ~ 2 0
78 IRAS 17575-2823 * 18 00 44.9982520416 -28 23 12.077043720           ~ 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 ~ ~           ~ 3930 0

To bookmark this query, right click on this link: simbad:objects in 2008A&A...489.1441R and select 'bookmark this link' or equivalent in the popup menu


2022.10.01-14:20:10

© Université de Strasbourg/CNRS

    • Contact