2012A&A...537A.121I

Query : 2012A&A...537A.121I

2012A&A...537A.121I - Astronomy and Astrophysics, volume 537A121-121 (2012/1-1)

Recent star formation in the inner Galactic Bulge seen by ISOGAL. II. The central molecular zone.

IMMER K., SCHULLER F., OMONT A. and MENTEN K.M.

Abstract (from CDS):

We present 5-38 µm spectroscopic observations of a sample of 68 ISOGAL sources with unknown natures, taken with the Spitzer Infrared Spectrograph. Based on the characteristics and the slope of their spectra, we classified the sources as young or late-type evolved objects. These sources were selected to test selection criteria based on the ISOGAL [7]-[15] color and the spatial extent parameter σ15. We revised these criteria until they reliably distinguished between young and late-type evolved objects and then applied them to all ISOGAL sources in the central molecular zone (CMZ), resulting in the selection of 485 sources believed to be young. Furthermore, we added 656 Midcourse Space Experiment (MSX) sources to the CMZ sample that fulfilled FE/FD>2 with FD and FE being the flux densities in the D (15µm) and E (21µm) bands. After obtaining (Lbol)/(F15) conversion factors, we calculated the bolometric luminosity, Lbol, values for the CMZ sample and subsequently the masses of the sources. Applying a Kroupa initial mass function, we derived the total mass in young objects that have been formed over the last 1Myr, resulting in an average star formation rate of 0.08 solar masses per year for the CMZ.

Abstract Copyright: ∼

Journal keyword(s): stars: formation - infrared: stars - Galaxy: stellar content - HII regions - Galaxy: center

Simbad objects: 67

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Number of rows : 67
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 J174457.4-291003 MIR 11 04 42.582 -77 41 57.13           ~ 1 0
2 NAME Sgr E Rad 17 42 38 -29 48.2           ~ 60 0
3 NAME Sgr C MoC 17 44 36.3 -29 28 13           ~ 400 0
4 ISOGAL-P J174459.1-290653 Y*? 17 44 59.04 -29 06 53.1           ~ 3 0
5 2MASS J17450069-2910078 Y*? 17 45 00.69504 -29 10 07.8456           ~ 2 0
6 ISOGAL-P J174501.0-285622 LP? 17 45 00.9462122684 -28 56 22.144497680           ~ 2 0
7 ISOGAL-P J174504.9-291146 Y*? 17 45 04.837 -29 11 46.48           ~ 11 0
8 ISOGAL-P J174505.1-290937 NIR 17 45 04.98 -29 09 39.9           ~ 2 0
9 ISOGAL-P J174505.6-291018 Y*? 17 45 05.6 -29 10 19           ~ 4 0
10 ISOGAL-P J174506.5-291118 Y*? 17 45 06.5 -29 11 19           ~ 4 0
11 ISOGAL-P J174508.0-291039 Y*? 17 45 07.92 -29 10 39.3           ~ 3 0
12 ISOGAL-P J174508.0-290655 MIR 17 45 08.0 -29 06 55           ~ 2 0
13 ISOGAL-P J174508.1-290840 MIR 17 45 08.1 -29 08 40           ~ 1 0
14 ISOGAL-P J174508.7-290348 NIR 17 45 08.65 -29 03 48.9           ~ 2 0
15 ISOGAL-P J174511.3-290621 MIR 17 45 11.4 -29 06 22           ~ 1 0
16 2MASS J17451253-2906467 Y*? 17 45 12.53784 -29 06 46.7424           ~ 2 0
17 ISOGAL-P J174515.4-291213 Y*? 17 45 15.41 -29 12 13.0           ~ 4 0
18 2MASS J17451603-2901558 Y*? 17 45 16.03 -29 01 55.8           ~ 3 0
19 MSX6C G359.8590+00.0036 WR* 17 45 16.1749983000 -29 03 15.711891516       22.31   WN10h 21 1
20 ISOGAL-P J174517.1-291155 MIR 17 45 17.1 -29 11 55           ~ 1 0
21 ISOGAL-P J174517.8-290813 Y*? 17 45 17.88 -29 08 14.4           ~ 3 0
22 ISOGAL-P J174518.1-290439 Y*? 17 45 18.10 -29 04 40.6           ~ 5 0
23 ISOGAL-P J174518.1-291051 Y*? 17 45 18.12 -29 10 48.7           ~ 3 0
24 ISOGAL-P J174518.3-290628 Y*? 17 45 18.244 -29 06 28.45           ~ 2 0
25 ISOGAL-P J174520.0-290750 MIR 17 45 20.0 -29 07 51           ~ 1 0
26 ISOGAL-P J174520.1-290638 MIR 17 45 20.1 -29 06 39           ~ 1 0
27 ISOGAL-P J174520.7-290213 Y*? 17 45 20.69 -29 02 13.2           ~ 3 0
28 ISOGAL-P J174522.1-291059 MIR 17 45 22.1 -29 11 00           ~ 1 0
29 ISOGAL-P J174522.4-290242 NIR 17 45 22.36 -29 02 42.0           ~ 2 0
30 ISOGAL-P J174523.1-290329 LP? 17 45 23.28 -29 03 31.0           M6-M7III 8 0
31 ISOGAL-P J174523.5-290225 MIR 17 45 23.5 -29 02 25           ~ 1 0
32 ISOGAL-P J174523.9-290310 LP? 17 45 23.82 -29 03 09.9           ~ 5 0
33 ISOGAL-P J174524.8-290529 MIR 17 45 24.8 -29 08 29           ~ 2 0
34 ISOGAL-P J174524.9-290318 NIR 17 45 25.05 -29 03 19.6           ~ 2 0
35 ISOGAL-P J174525.7-290942 MIR 17 45 25.7 -29 09 43           ~ 1 0
36 ISOGAL-P J174527.2-291126 MIR 17 45 27.1 -29 11 27           ~ 1 0
37 ISOGAL-P J174527.4-290655 MIR 17 45 27.4 -29 06 55           ~ 1 0
38 ISOGAL-P J174529.5-291021 MIR 17 45 29.5 -29 10 21           ~ 1 0
39 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
40 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4970 3
41 NAME Arches Cluster Cl* 17 45 50.5 -28 49 28           ~ 792 0
42 2MASS J17455326-2904071 EB* 17 45 53.264 -29 04 07.19           ~ 3 0
43 ISOGAL-P J174555.6-290521 Y*? 17 45 55.52 -29 05 21.9           ~ 2 0
44 ISOGAL-P J174557.7-290302 MIR 17 45 57.7 -29 03 03           ~ 1 0
45 ISOGAL-P J174600.1-290150 MIR 17 46 00.1 -29 01 51           ~ 1 0
46 OH 359.936-00.144 OH* 17 46 01.94184 -29 03 58.9716           O-rich 12 0
47 ISOGAL-P J174602.5-290427 MIR 17 46 02.5 -29 04 27           ~ 1 0
48 ISOGAL-P J174612.7-285958 MIR 17 46 12.7 -28 59 58           ~ 1 0
49 ISOGAL-P J174613.1-290327 MIR 17 46 13.1 -29 03 28           ~ 1 0
50 ISOGAL-P J174613.5-290024 MIR 17 46 13.5 -29 00 24           ~ 1 0
51 NAME Quintuplet Cluster OpC 17 46 13.9 -28 49 48           ~ 561 0
52 ISOGAL-P J174617.6-285857 MIR 17 46 17.6 -28 58 58           ~ 1 0
53 ISOGAL-P J174618.0-290245 MIR 17 46 18.0 -29 02 45           ~ 1 0
54 WR 102ka WR* 17 46 18.12 -29 01 36.6           WN10 35 0
55 ISOGAL-P J174619.4-285611 MIR 17 46 19.4 -28 56 11           ~ 1 0
56 ISOGAL-P J174620.8-290532 Y*? 17 46 20.81 -29 05 32.2           ~ 2 0
57 OH 000.050-00.165 OH* 17 46 22.96608 -28 58 44.7420           O-rich 4 0
58 ISOGAL-P J174623.8-285300 Y*? 17 46 23.34888 -28 53 04.5888           ~ 4 0
59 ISOGAL-P J174624.9-290345 MIR 17 46 24.9 -29 03 45           ~ 1 0
60 ISOGAL-P J174631.1-290652 MIR 17 46 31.1 -29 06 52           ~ 1 0
61 ISOGAL-P J174631.2-285448 MIR 17 46 31.2 -28 54 49           ~ 1 0
62 ISOGAL-P J174631.8-285027 MIR 17 46 31.8 -28 50 28           ~ 1 0
63 ISOGAL-P J174632.9-285115 MIR 17 46 32.9 -28 51 16           ~ 1 0
64 NAME Sgr B1 MoC 17 47 02.0 -28 31 57           ~ 177 0
65 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 2443 1
66 NAME Sgr D MoC 17 48 41.75 -28 01 45.0           ~ 137 1
67 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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