1998A&A...336..925W


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.22CEST09:11:31

1998A&A...336..925W - Astronomy and Astrophysics, volume 336, 925-941 (1998/8-3)

Infrared monitoring of OH/IR stars near the Galactic Center.

WOOD P.R., HABING H.J. and McGREGOR P.J.

Abstract (from CDS):

We have monitored 102 fields of size 1'x1' within ∼0.7° of the Galactic Center for 1200 days in the K band. Each field was centered on one of the OH/IR stars found by Lindqvist et al. (1992A&AS...92...43L) Infrared colours J-K, H-K and K-L were also obtained. Periods have been determined for 80 known OH/IR stars, including 5 from Sjouwerman (1997, PhD Thesis, Chalmers Univiersity of Technology) and a further 29 previously unknown long-period variables (LPVs) of large (>0.5mag) K amplitude. The overall period distribution of the variables extends from ∼200 days to ∼1100 days and it is dominated by LPVs with P<600 days. The existence of LPVs with P<300 days indicates the presence of sub-solar metallicity, old, low mass stars near the Galactic Center. These old LPVs have luminosities equal to those of similar LPVs elsewhere in the Galaxy. However, the LPVs with P>300 days near the Galactic Center have lower luminosities and higher wind expansion velocities vexp at a given period than similar stars in the Galactic bulge or solar vicinity, indicating that the metal abundance of Galactic Center stars is ∼2-4 times solar. Another consequence of the observed low luminosities of the Galactic Center LPVs is that the (Mbol, logP) and (K, logP) relations must be metallicity dependent, at least for metallicities of solar or above. The maximum periods and luminosities of Galactic Center LPVs exceed those of bulge LPVs suggesting that there are AGB stars near the Galactic Center which are more massive than any stars in the bulge. AGB masses up to ∼4M are relatively common, with a few AGB stars having masses up to ∼7M. There should be ∼1000 main-sequence precursors in the same volume for each of these massive AGB stars. The high expansion velocity (vexp>18km/s) OH/IR stars are separated from the lower expansion velocity OH/IR stars in the (Mbol, logP) diagram: this separation suggests that the stars with higher vexp have higher metallicity, as well as being younger. The overall results suggest that ongoing star formation and metal enrichment have occurred near the Galactic Center.

Abstract Copyright:

Journal keyword(s): stars: AGB and post-AGB - stars: late-type - stars: oscillations - stars: mass-loss - Galaxy: center

Nomenclature: Tables 1, 3: [WHM98] NNN-NNN N=81+29.

Simbad objects: 122

goto View the reference in ADS

Number of rows : 122

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 OH 359.508 +0.179 OH* 17 43 44.73864 -29 15 44.6328           ~ 8 0
2 OH 359.513 +0.174 OH* 17 43 46.72704 -29 15 38.4444           ~ 9 0
3 OH 359.889 +0.361 OH* 17 43 56.936 -28 50 30.80           ~ 7 0
4 OH 359.748 +0.274 OH* 17 43 57.045 -29 00 28.36           ~ 7 0
5 OH 359.487 +0.081 OH* 17 44 04.694 -29 19 53.84           ~ 5 0
6 OH 359.4 +0.0 OH* 17 44 06.89688 -29 24 16.7796           ~ 14 0
7 [WHM98] 3-7 Mi* 17 44 07.48 -29 24 45.9           ~ 3 0
8 OH 0.0 +0.3 OH* 17 44 14.95464 -28 45 06.0228           ~ 12 0
9 IRAS 17411-2843 OH* 17 44 19.22928 -28 44 21.7824           ~ 11 0
10 OH 359.943 +0.260 OH* 17 44 28.197 -28 50 56.16           ~ 11 0
11 OH 359.437 -0.051 OH* 17 44 28.335 -29 26 34.07           ~ 5 0
12 OH 359.800 +0.165 OH* 17 44 30.110 -29 01 14.34           ~ 7 0
13 [WHM98] 41-1 Mi? 17 44 31.34928 -29 01 03.7272           ~ 2 0
14 OH 359.496 -0.036 OH* 17 44 33.429 -29 23 06.37           ~ 5 0
15 [WHM98] 7-10 Mi* 17 44 33.858 -29 23 06.73           ~ 4 0
16 [TVH89] 158 OH* 17 44 34.327 -29 10 38.59           ~ 18 0
17 [TVH89] 160 OH* 17 44 36.482 -29 00 19.79           ~ 12 0
18 [WHM98] 8-10 Mi* 17 44 37.496 -29 23 05.02           ~ 3 0
19 OH 359.502 -0.054 OH* 17 44 38.516 -29 23 22.34           ~ 4 0
20 OH 359.598 +0.000 OH* 17 44 39.66624 -29 16 46.3764           ~ 11 0
21 OH 359.765 +0.082 OH* 17 44 44.431 -29 05 37.92           ~ 11 0
22 OH 359.890 +0.155 OH* 17 44 45.038 -28 56 58.06           ~ 8 0
23 OH 359.760 +0.072 OH* 17 44 45.960 -29 06 13.63           ~ 8 0
24 OH 359.755 +0.061 OH* 17 44 47.938 -29 06 49.93           ~ 10 0
25 [WHM98] 27-1 Mi* 17 44 51.209 -29 09 22.13           ~ 4 0
26 OH 359.719 +0.025 OH* 17 44 51.250 -29 09 45.31           ~ 8 0
27 OH 359.669 -0.019 OH* 17 44 54.16 -29 13 44.9           ~ 7 0
28 OH 359.974 +0.162 OH* 17 44 55.62 -28 52 27.0           ~ 14 0
29 OH 359.576 -0.091 OH* 17 44 57.744 -29 20 42.42           ~ 9 0
30 [WHM98] 78-23 LP* 17 45 02.358 -28 50 54.57           ~ 5 0
31 OH 359.778 +0.010 OH* 17 45 03.20 -29 07 12.6           ~ 14 0
32 OH 0.018 +0.156 OH* 17 45 03.278 -28 50 22.80           ~ 10 0
33 OH 359.640 -0.084 OH* 17 45 05.286 -29 17 13.42           ~ 8 0
34 [WHM98] 18-18 Mi* 17 45 06.353 -29 17 05.10           ~ 5 0
35 OH 359.837 +0.030 OH* 17 45 06.91 -29 03 33.5           ~ 13 0
36 [WHM98] 48-3 LP? 17 45 08.03 -29 03 42.6           ~ 4 0
37 OH 359.902 +0.061 OH* 17 45 08.84 -28 59 16.7           ~ 10 0
38 OH 359.636 -0.108 OH* 17 45 10.395 -29 18 12.26           ~ 10 0
39 OH 0.200 +0.233 OH* 17 45 11.454 -28 38 38.53           ~ 11 0
40 OH 0.173 +0.211 OH* 17 45 12.45 -28 40 44.4           ~ 8 0
41 OH 359.716 -0.070 OH* 17 45 12.916 -29 12 54.67           ~ 7 0
42 OH 359.763 -0.042 OH* 17 45 13.07 -29 09 36.3           ~ 11 0
43 OH 359.681 -0.095 OH* 17 45 13.85256 -29 15 28.6524           ~ 11 0
44 OH 359.803 -0.021 OH* 17 45 13.931 -29 06 55.39           ~ 8 0
45 OH 359.797 -0.025 OH* 17 45 14.269 -29 07 20.75           ~ 11 0
46 [WHM98] 34-63 Mi* 17 45 14.41 -29 09 18.5           ~ 8 0
47 OH 359.684 -0.104 OH* 17 45 16.428 -29 15 37.61           ~ 8 0
48 OH 359.652 -0.131 OH* 17 45 18.095 -29 18 03.80           ~ 7 0
49 [WHM98] 60-1 Mi* 17 45 18.299 -28 58 39.31           ~ 7 0
50 OH 359.924 +0.034 OH* 17 45 18.94 -28 58 57.6           ~ 10 0
51 OH 359.711 -0.100 OH* 17 45 19.337 -29 14 05.79           ~ 11 0
52 OH 0.221 +0.168 OH* 17 45 29.02 -28 39 38.5           ~ 7 0
53 OH 359.634 -0.195 OH* 17 45 30.453 -29 21 00.00           ~ 7 0
54 [WHM98] 13-15 Mi* 17 45 31.92264 -29 25 00.2640           ~ 4 0
55 OH 359.888 -0.051 OH* 17 45 33.24 -29 03 29.1           ~ 8 0
56 OH 359.6 -0.2 OH* 17 45 33.515 -29 25 08.51           ~ 11 1
57 OH 0.083 +0.064 OH* 17 45 34.253 -28 49 56.00           ~ 9 0
58 OH 359.855 -0.078 OH* 17 45 34.79 -29 06 02.7           ~ 14 0
59 OH 359.955 -0.031 OH* 17 45 37.909 -28 59 26.45           ~ 8 0
60 OH 359.91 -0.06 OH* 17 45 38.3 -29 02 34           ~ 5 0
61 OH 359.918 -0.056 OH* 17 45 38.460 -29 02 03.94           ~ 14 0
62 NAME Galactic Center gam 17 45 39.60213 -29 00 22.0000           ~ 12263 0
63 [SVW98] OH 359.947-0.046 OH* 17 45 40.387 -29 00 16.37           ~ 3 0
64 [TVH89] 178 OH* 17 45 40.612 -29 00 55.51           ~ 20 0
65 [TVH89] 179 OH* 17 45 40.63 -29 00 23.5           ~ 58 0
66 OH 359.93 -0.06 OH* 17 45 41.39 -29 01 26.6           ~ 17 0
67 OH 359.965 -0.043 OH* 17 45 42.348 -28 59 17.81           ~ 7 0
68 [WHM98] 69-1 Mi* 17 45 42.884 -28 59 02.27           ~ 8 0
69 OH 359.970 -0.049 OH* 17 45 44.32 -28 59 13.3           ~ 12 0
70 OH 0.352 +0.175 OH* 17 45 46.57 -28 32 39.5           ~ 6 0
71 OH 359.814 -0.162 OH* 17 45 48.49 -29 10 45.5           ~ 9 0
72 [TVH89] 183 OH* 17 45 49.40544 -28 58 49.4400           ~ 24 0
73 OH 359.999 -0.061 OH* 17 45 51.270 -28 58 07.43           ~ 10 0
74 [TVH89] 186 OH* 17 45 51.92 -28 44 51.6           ~ 17 0
75 OH 359.768 -0.207 OH* 17 45 52.620 -29 14 30.42           ~ 7 0
76 [WHM98] 36-3 Mi? 17 45 53.170 -29 14 40.62           ~ 2 0
77 [WHM98] 72-57 Mi* 17 45 53.35 -29 00 33.6           ~ 5 0
78 [WHM98] 75-6 LP* 17 45 53.40 -28 58 13.1           ~ 5 0
79 OH 0.4 +0.1 OH* 17 45 54.181 -28 31 46.00           ~ 14 0
80 OH 359.98 -0.09 OH* 17 45 54.4 -29 00 01           ~ 11 0
81 [WHM98] 72-2 LP* 17 45 54.66 -28 59 53.5           ~ 4 0
82 OH 0.274 +0.086 OH* 17 45 56.084 -28 39 27.46           ~ 6 0
83 [WHM98] 70-5 LP* 17 45 58.89 -29 01 12.5           ~ 4 0
84 OH 0.007 -0.088 OH* 17 45 58.90 -28 58 35.0           ~ 10 0
85 OH 0.053 -0.062 OH* 17 45 59.472 -28 55 23.63           ~ 16 0
86 OH 0.129 -0.020 OH* 17 46 00.254 -28 50 11.78           ~ 10 0
87 OH 359.97 -0.12 OH* 17 46 01.0 -29 01 23           ~ 18 0
88 OH 0.134 -0.023 OH* 17 46 01.600 -28 50 00.61           ~ 8 0
89 OH 0.217 +0.023 OH* 17 46 02.892 -28 44 20.85           ~ 9 0
90 [WHM98] 103-7 Mi* 17 46 04.79 -28 44 00.2           ~ 4 0
91 [WHM98] 51-85 V* 17 46 06.3 -29 09 30           ~ 2 0
92 OH 359.803 -0.248 OH* 17 46 07.262 -29 13 58.95           ~ 7 0
93 [TVH89] 192 OH* 17 46 07.43 -28 52 16.8           ~ 12 0
94 OH 359.873 -0.209 OH* 17 46 08.08 -29 09 14.6           ~ 9 0
95 [WHM98] 74-2 LP* 17 46 10.375 -29 00 43.39           ~ 4 0
96 OH 360.00 -0.14 OH* 17 46 10.4 -29 00 43           ~ 7 0
97 OH 0.349 +0.053 OH* 17 46 14.475 -28 36 39.54           ~ 8 0
98 OH 0.241 -0.014 OH* 17 46 14.96 -28 44 17.3           ~ 8 0
99 OH 0.225 -0.055 OH* 17 46 22.11 -28 46 22.6           ~ 10 0
100 OH 0.036 -0.182 OH* 17 46 24.867 -29 00 01.41           ~ 10 0
101 OH 0.180 -0.098 OH* 17 46 25.83 -28 50 00.2           ~ 8 0
102 [WHM98] 94-4 LP* 17 46 28.014 -28 53 38.34           ~ 4 0
103 OH 0.138 -0.136 OH* 17 46 28.708 -28 53 19.49           ~ 13 0
104 OH 0.452 +0.046 OH* 17 46 30.733 -28 31 33.19           ~ 8 0
105 OH 0.336 -0.027 OH* 17 46 31.227 -28 39 48.68           ~ 6 0
106 [WHM98] 121-6 Mi? 17 46 31.279 -28 31 06.41           ~ 2 0
107 OH 0.395 +0.008 OH* 17 46 31.692 -28 35 41.43           ~ 6 0
108 OH 0.265 -0.078 OH* 17 46 33.116 -28 45 00.72           ~ 8 1
109 OH 359.7 -0.4 OH* 17 46 35.60496 -29 21 51.4188           ~ 9 0
110 OH 0.45 +0.03 OH* 17 46 35.7 -28 32 08           ~ 4 0
111 [WHM98] 122-11 Mi* 17 46 37.317 -28 32 25.61           ~ 5 0
112 [WHM98] 39-1 Mi* 17 46 37.64064 -29 19 28.3332           ~ 4 0
113 OH 359.8 -0.4 OH* 17 46 38.12064 -29 19 30.6768           ~ 11 0
114 OH 0.447 -0.006 OH* 17 46 42.291 -28 33 26.13           ~ 7 0
115 OH 0.26 -0.14 OH* 17 46 47.82 -28 47 15.4           ~ 8 0
116 OH 0.307 -0.176 OH* 17 47 02.169 -28 45 55.79           ~ 6 0
117 [WHM98] 49-3 Mi? 17 47 19.516 -29 20 31.51           ~ 2 0
118 OH 0.437 -0.179 OH* 17 47 21.283 -28 39 22.84           ~ 5 0
119 OH 359.851 -0.533 OH* 17 47 21.336 -29 20 24.48           ~ 4 0
120 OH 0.536 -0.130 OH* 17 47 24.016 -28 32 42.93           ~ 6 0
121 OH 0.523 -0.206 OH* 17 47 39.645 -28 35 46.81           ~ 5 0
122 [WHM98] 126-1 Mi? 17 47 39.974 -28 35 24.04           ~ 2 0

    Equat.    Gal    SGal    Ecl

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2021.06.22-09:11:31

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