2003A&A...405..531S

Query : 2003A&A...405..531S

2003A&A...405..531S - Astronomy and Astrophysics, volume 405531-550 (2003/7-2)

Near-IR spectra of ISOGAL sources in the inner Galactic Bulge.

SCHULTHEIS M., LANCON A., OMONT A., SCHULLER F. and OJHA D.K.

Abstract (from CDS):

We present near-IR spectra (HK-band) of a sample of 107 sources with mid-IR excesses at 7 and 15 µm detected during the ISOGAL survey. Making use of the DENIS interstellar extinction map from Schultheis et al. (1999A&A...349L..69S) we derive luminosities and find that the Mbol vs. 12CO and Mbol vs. H2O diagrams are powerful tools for identifying supergiants, AGB stars, giants and young stellar objects. The majority of our sample are AGB stars (∼80%) while we find four good supergiant candidates, nine young stellar objects and 12 RGB candidates. We have used the most recent K0-[15] relation by Jeong et al. (2002, in Mass-losing Pulsating stars and their Circumstellar Matter, ed. Y. Nakasa, M. Honma, & M. Sekiin ) based on recent theoretical modeling of dust formation of AGB stars to determine mass-loss rates. The mass-loss rates of the supergiants are comparable with those in the solar neighbourhood while the long-period variables cover a mass-loss range from -5<log{dot}(M)←7. The red giant candidates lie at the lower end of the mass-loss rate range between -6.5<log{dot}(M)←9. We used the equivalent width of the CO bandhead at 2.3µm, the NaI doublet and the CaI triplet to estimate metallicities using the relation by Ramirez et al. (2000AJ....120..833R). The metallicity distribution of the ISOGAL objects shows a mean [Fe/H]~-0.25dex with a dispersion of ±0.40dex which is in agreement with the values of Ramirez et al. (2000AJ....120..833R) for Galactic Bulge fields between b=-4° and b=-1.3°. A comparison with the solar neighbourhood sample of Lancon & Wood (2000A&AS..146..217L) shows that our sample is ∼0.5dex more metal-rich on average.

Abstract Copyright: ∼

Journal keyword(s): infrared: stars - ISM: dust, extinction - Galaxy: bulge - stars: AGB and post-AGB

VizieR on-line data: <Available at CDS (J/A+A/405/531): table1.dat spectra/*>

Nomenclature: Table A1: [SLO2003] ANN N=107.

Simbad objects: 108

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Number of rows : 108
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 ISOGAL-P J173053.2-334021 AB* 17 30 53.23080 -33 40 22.0584           ~ 2 0
2 ISOGAL-P J174036.3-294913 AB* 17 40 36.2761008624 -29 49 13.866178476           M0.5 8 0
3 ISOGAL-P J174227.3-295417 AB* 17 42 27.28 -29 54 17.8           ~ 5 0
4 ISOGAL-P J174228.0-295614 Y*? 17 42 28.0 -29 56 15           ~ 3 0
5 ISOGAL-P J174228.0-293746 AB* 17 42 28.0 -29 37 47           ~ 2 0
6 ISOGAL-P J174229.9-300115 Y*? 17 42 29.9 -30 01 16           ~ 2 0
7 ISOGAL-P J174239.5-294327 AB* 17 42 39.5 -29 43 27           ~ 2 0
8 ISOGAL-P J174244.4-295836 AB* 17 42 44.35 -29 58 36.1           ~ 4 0
9 ISOGAL-P J174247.7-295625 AB* 17 42 47.7 -29 56 26           ~ 2 0
10 ISOGAL-P J174258.8-294959 AB* 17 42 58.8 -29 50 00           ~ 3 0
11 ISOGAL-P J174303.4-293801 AB* 17 43 03.4 -29 38 01           ~ 2 0
12 ISOGAL-P J174311.2-295129 AB* 17 43 11.15 -29 51 29.9           ~ 3 0
13 ISOGAL-P J174313.0-292101 AB* 17 43 13.0 -29 21 01           ~ 1 0
14 ISOGAL-P J174314.7-293749 AB* 17 43 14.7 -29 37 50           ~ 2 0
15 ISOGAL-P J174315.5-292458 AB* 17 43 15.43 -29 24 58.8           K1-M7I-III 4 0
16 [SLO2003] G35 AB* 17 43 16.4 -30 13 11           ~ 1 0
17 ISOGAL-P J174319.6-295030 Y*? 17 43 19.6 -29 50 31           ~ 2 0
18 ISOGAL-P J174324.6-295312 AB* 17 43 24.57 -29 53 12.4           ~ 1 0
19 ISOGAL-P J174325.0-294123 AB* 17 43 25.0 -29 41 23           ~ 2 0
20 ISOGAL-P J174328.2-291741 AB* 17 43 28.1728032821 -29 17 41.897004461           M6-M7III 5 0
21 ISOGAL-P J174329.8-300127 AB* 17 43 29.79096 -30 01 27.1488           O-rich 2 0
22 ISOGAL-P J174339.2-292244 AB* 17 43 39.15 -29 22 44.4           ~ 2 0
23 ISOGAL-P J174344.2-293826 AB* 17 43 44.147 -29 38 25.70           ~ 7 0
24 2MASS J17434857-2927189 AB* 17 43 48.57 -29 27 18.9           ~ 1 0
25 ISOGAL-P J174404.7-292518 AB* 17 44 04.67 -29 25 18.9           ~ 2 0
26 IRAS 17409-2926 Y*? 17 44 07.44624 -29 27 37.6236           K1-M7.5I-III 11 0
27 ISOGAL-P J174407.5-300741 AB* 17 44 07.5 -30 07 41           ~ 2 0
28 ISOGAL-P J174408.1-293222 Y*? 17 44 08.05 -29 32 22.6           K1-M7.5I-III 7 0
29 ISOGAL-P J174411.5-293131 AB* 17 44 11.47 -29 31 31.1           ~ 2 0
30 ISOGAL-P J174412.8-293124 AB* 17 44 12.71 -29 31 24.7           ~ 1 0
31 ISOGAL-P J174412.8-292655 Y*? 17 44 12.78 -29 26 55.5           K0-M7.5I-III 7 0
32 2MASS J17441647-2926077 * 17 44 16.47 -29 26 07.7           ~ 1 0
33 ISOGAL-P J174417.6-292558 AB* 17 44 17.562 -29 25 58.88           ~ 2 0
34 ISOGAL-P J174417.8-292713 Y*? 17 44 17.75 -29 27 13.0           ~ 2 0
35 ISOGAL-P J174421.7-292736 Y*? 17 44 21.65 -29 27 36.3           ~ 2 0
36 2MASS J17442273-2934549 Y*? 17 44 22.737 -29 34 54.94           ~ 2 0
37 2MASS J17442372-2908554 * 17 44 23.73 -29 08 55.4           ~ 2 0
38 ISOGAL-P J174427.4-293805 AB* 17 44 27.34536 -29 38 05.8560           O-rich 5 0
39 2MASS J17442744-2928528 * 17 44 27.45 -29 28 52.9           ~ 1 0
40 ISOGAL-P J174430.0-292857 Y*O 17 44 29.9 -29 28 57           ~ 1 0
41 ISOGAL-P J174430.4-290715 AB* 17 44 30.34 -29 07 15.6           ~ 4 0
42 ISOGAL-P J174431.7-290620 AB? 17 44 31.64400 -29 06 20.8836           ~ 5 0
43 ISOGAL-P J174431.8-291710 AB* 17 44 31.73 -29 17 11.8           ~ 4 0
44 [SLO2003] B37 Y*O 17 44 33.8 -29 23 58           ~ 1 0
45 OH 359.675+00.069 OH* 17 44 34.32672 -29 10 38.5932           O-rich 24 0
46 OH 359.76+00.12 OH* 17 44 34.96176 -29 04 35.6736           O-rich 33 0
47 ISOGAL-P J174435.7-291305 AB? 17 44 35.62320 -29 13 05.7756           ~ 7 0
48 ISOGAL-P J174436.4-290925 AB* 17 44 36.4 -29 09 25           ~ 1 0
49 OH 359.598+00.000 OH* 17 44 39.66624 -29 16 46.3764           O-rich 12 0
50 OH 359.765+00.082 OH* 17 44 44.43144 -29 05 37.9176           O-rich 13 0
51 2MASS J17444449-2931368 Y*? 17 44 44.498 -29 31 36.87           ~ 2 0
52 ISOGAL-P J174444.6-290733 AB* 17 44 44.6 -29 07 34           ~ 1 0
53 OH 359.755+00.061 OH* 17 44 47.93760 -29 06 49.9284           O-rich 11 0
54 2MASS J17444856-2900131 * 17 44 48.56 -29 00 13.1           ~ 2 0
55 [SLO2003] A17 * 17 44 49.1 -29 19 54           ~ 1 0
56 [GMC2001] 22-60 Mi* 17 44 49.47 -29 03 16.0           ~ 7 0
57 ISOGAL-P J174450.3-291921 AB* 17 44 50.25264 -29 19 21.5220           ~ 2 0
58 ISOGAL-P J174452.7-291411 AB* 17 44 52.61 -29 14 11.0           ~ 5 0
59 ISOGAL-P J174452.9-290706 AB* 17 44 52.9 -29 07 07           ~ 1 0
60 [SLO2003] A22 * 17 44 53.1 -28 59 47           ~ 2 0
61 OH 359.669-00.019 OH* 17 44 54.15768 -29 13 44.8752           O-rich 11 0
62 ISOGAL-P J174454.7-290359 LP* 17 44 54.63 -29 03 58.7           ~ 3 0
63 ISOGAL-P J174455.5-290143 LP* 17 44 55.47 -29 01 43.4           ~ 4 0
64 [GMC2001] 21-72 LP* 17 44 56.74 -29 10 20.5           ~ 5 0
65 ISOGAL-P J174457.0-290557 AB* 17 44 56.98 -29 05 57.4           ~ 4 0
66 ISOGAL-P J174457.1-291524 AB* 17 44 57.04968 -29 15 24.6924           O-rich 6 0
67 OH 359.576-00.091 OH* 17 44 57.74424 -29 20 42.4176           O-rich 10 0
68 [SLO2003] A30 AB* 17 44 57.9 -29 04 06           ~ 1 0
69 [GMC2001] 21-39 Mi* 17 44 58.89528 -29 09 10.7388           O-rich 12 0
70 ISOGAL-P J174459.5-291604 Y*? 17 44 59.45 -29 16 04.7           ~ 4 0
71 [GMC2001] 21-6 AB* 17 44 59.59152 -29 11 15.2880           O-rich 10 0
72 [GMC2001] 23-37 Mi* 17 45 00.978 -29 01 14.96           ~ 9 0
73 OH 359.838+00.053 OH* 17 45 01.70304 -29 02 49.8984           O-rich 15 0
74 OH 359.864+00.056 OH* 17 45 04.70784 -29 01 24.8844           O-rich 9 0
75 [GMC2001] 22-11 Mi* 17 45 04.77792 -29 05 48.4512           M3.5-M8III 12 0
76 ISOGAL-P J174504.9-291146 Y*? 17 45 04.837 -29 11 46.48           ~ 11 0
77 [GMC2001] 23-7 Mi* 17 45 05.24 -29 01 35.8           ~ 6 0
78 OH 359.837+00.030 OH* 17 45 06.89688 -29 03 33.3972           O-rich 16 0
79 ISOGAL-P J174509.8-290517 * 17 45 09.8 -29 05 18           ~ 2 0
80 ISOGAL-P J174510.8-290712 AB* 17 45 10.74 -29 07 11.8           ~ 5 0
81 [GMC2001] 19-3321 Mi* 17 45 12.09096 -29 04 24.8376           ~ 14 0
82 [GMC2001] 19-3 AB* 17 45 13.48392 -29 05 26.6712           K0-M9I-III 12 0
83 OH 359.681-00.095 OH* 17 45 13.85256 -29 15 28.6524           O-rich 12 0
84 OH 359.797-00.025 OH* 17 45 14.26896 -29 07 20.7516           O-rich 13 0
85 ISOGAL-P J174516.7-290734 * 17 45 16.7 -29 07 34           ~ 1 0
86 ISOGAL-P J174517.5-291018 AB* 17 45 17.5 -29 10 19           ~ 1 0
87 ISOGAL-P J174518.0-290842 LP* 17 45 17.98 -29 08 42.7           ~ 2 0
88 ISOGAL-P J174518.8-290505 AB* 17 45 18.8 -29 05 05           ~ 1 0
89 OH 359.711-00.100 OH* 17 45 19.33680 -29 14 05.7876           O-rich 15 0
90 [GMC2001] 19-780 Mi* 17 45 20.503 -29 07 19.27           ~ 8 0
91 ISOGAL-P J174520.9-291342 AB* 17 45 20.9 -29 13 42           ~ 2 0
92 [GMC2001] 19-660 Mi* 17 45 21.44 -29 06 36.1           ~ 6 0
93 ISOGAL-P J174521.9-291344 AB* 17 45 21.88 -29 13 44.3           ~ 6 0
94 OH 359.810-00.070 OH* 17 45 26.35344 -29 08 03.9336           O-rich 20 0
95 ISOGAL-P J174527.5-290439 * 17 45 27.5 -29 04 40           ~ 2 0
96 ISOGAL-P J174528.4-290422 AB* 17 45 28.377 -29 04 22.75           ~ 3 0
97 ISOGAL-P J174528.5-291805 AB* 17 45 28.5 -29 18 05           ~ 1 0
98 OH 359.799-00.090 OH* 17 45 29.46024 -29 09 16.4196           O-rich 26 0
99 ISOGAL-P J174530.5-291550 AB* 17 45 30.43 -29 15 51.0           ~ 1 0
100 OH 359.757-00.136 OH* 17 45 34.40664 -29 12 54.1188           O-rich 5 0
101 ISOGAL-P J174536.0-290438 AB* 17 45 35.961 -29 04 38.25           ~ 2 0
102 ISOGAL-P J174538.2-291720 AB* 17 45 38.2 -29 17 20           ~ 2 0
103 IRAS 17425-2914 AB* 17 45 39.96192 -29 16 02.8200           O-rich 7 0
104 2MASS J17454060-2904275 AB* 17 45 40.60 -29 04 27.6           ~ 1 0
105 ISOGAL-P J174540.7-291454 AB* 17 45 40.69 -29 14 54.4           ~ 2 0
106 2MASS J17454138-2913437 * 17 45 41.38 -29 13 43.7           ~ 1 0
107 HD 316232 * 17 45 43.6893737952 -29 13 18.038792028 10.61 10.92 10.27 10.25   O9IV 38 0
108 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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