2008A&A...478..127P


Query : 2008A&A...478..127P

2008A&A...478..127P - Astronomy and Astrophysics, volume 478, 127-135 (2008/1-4)

Compact mid-IR sources east of Galactic Center source IRS 5.

PERGER M., MOULTAKA J., ECKART A., VIEHMANN T., SCHOEDEL R. and MUZIC K.

Abstract (from CDS):

Mid-infrared observations of the Galactic Center show among the extended mini-spiral a number of compact sources. Their nature is of interest because they represent an interaction of luminous stars with the mini-spiral material or mass losing sources that are enshrouded in dust and gas shells. Characterizing their nature is necessary to obtain a complete picture of the different stellar populations and the star formation history of the cental stellar cluster in general. Prominent compact MIR sources in the Galactic Center are either clearly offset from the mini-spiral (e.g. the M2 super-giant IRS 7 and the bright dust enshrouded IRS 3) or have been identified earlier with bright bow shock sources (e.g. IRS 21, 1W, 10W and IRS 5). There are, however, four less prominent compact sources east of IRS 5, the natures of which were unclear until now. We present near-infrared K-band long slit spectroscopy of the four sources east of IRS 5 obtained with the ISAAC spectrograph at the ESO VLT in July 2005. We interpret the data in combination with high angular resolution NIR and MIR images obtained with ISAAC and NACO at the ESO VLT. The K'-band images and proper motions show that the sources are multiple. For all but one source we find dominant contributions from late type stars with best overall fits to template stars with temperatures below 5000K. The brightest sources contained in IRS 5NE, 5E and 5S may be asymptotic giant branch stars and a part of the MIR excess may be due to dust shells produced by the individual sources. However, in all cases an interaction with the mini-spiral cannot be excluded and their broad band infrared SEDs indicate that they could be lower luminosity counterparts of the identified bow shock sources. In fact, IRS 5SE is associated with a faint bow shock and its spectrum shows contributions from a hotter early type star which supports such a classification.

Abstract Copyright:

Journal keyword(s): Galaxy: center - galaxies: nuclei - infrared: ISM

Nomenclature: Table 1, Fig.3: GCIRS 5WN, GCIRS 5WWN N=9 added. Table 1, Fig.4: [PME2008] NNa (Nos 1-13, 14a-14e, 15-20, 21a-21c).

Simbad objects: 46

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Number of rows : 46
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 Mayrit 1095334 Y*? 05 38 12.3980623968 -02 19 38.868337236   21.22   19.97 17.84 ~ 12 0
2 V* V2721 Ori Or* 05 38 12.7943963976 -02 12 26.712005436   21.97 20.28 17.94 16.97 M4.0V 11 0
3 OGLE LMC-LPV-76162 LP* 05 38 14.733 -69 03 29.51   16.76 17.122   15.408 B1.5Ve+ 9 0
4 VFTS 283 Be* 05 38 16.9995 -69 03 49.010   15.3 15.31     B1.5V-III(n)e 13 0
5 2MASS J05381763-6904119 * 05 38 17.639 -69 04 11.92   15.72 13.96     ~ 17 0
6 CPD-69 449 * 05 38 18.3077404056 -69 04 02.246083932   13.32 13.19     A0Ib 8 0
7 Dor IRS 17 IR 05 38 20.6 -69 06 18           ~ 2 0
8 Cl* NGC 2070 MEL B3 * 05 38 20.9205414240 -69 03 50.017511412   14.32 13.84     A5Ib 9 0
9 RMC 133 SB* 05 38 23.7090122184 -69 05 03.562237032   12.43 12.49     O7/8II 29 0
10 Dor IRS 28 IR 05 38 27.3 -69 06 17           ~ 2 0
11 2MASS J05383461-6905569 Y*O 05 38 34.619 -69 05 56.92     18.41   16.75 ~ 16 0
12 * 15 Mon Be* 06 40 58.65963 +09 53 44.7229 3.360 4.45 4.68   4.88 O7V+B1.5/2V 781 0
13 * kap Gem ** 07 44 26.8535692 +24 23 52.787227 5.19 4.49 3.57 2.86 2.41 G8III-IIIb 293 0
14 HD 68312 PM* 08 11 33.0044249688 -07 46 21.140491116   6.259 5.354     G7III-IIIb 80 0
15 * omi UMa PM* 08 30 15.8701566400 +60 43 05.405606188 4.79 4.27 3.42 2.76 2.31 G5III: 242 1
16 * eta UMa PM* 13 47 32.43776 +49 18 47.7602 0.99 1.67 1.86 1.98 2.16 B3V 597 0
17 * tau Sco * 16 35 52.9528530 -28 12 57.661515 1.55 2.56 2.81 2.93 3.18 B0.2V 901 0
18 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13430 0
19 GCIRS 13E Cl* 17 45 39.73 -29 00 29.7           WN9 111 0
20 GCIRS 13N * 17 45 39.812 -29 00 29.16           ~ 39 0
21 GCIRS 12N * 17 45 39.86 -29 00 35.7           M0III 57 0
22 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4041 3
23 GCIRS 16NW WR* 17 45 40.0451 -29 00 26.847           Ofpe/WN9 132 0
24 GCIRS 15NE WR* 17 45 40.15 -29 00 16.5           WN8/9 57 0
25 GCIRS 16NE WR* 17 45 40.26 -29 00 27.2           Ofpe/WN9 148 0
26 GCIRS 1W Em* 17 45 40.442 -29 00 27.51           Be? 102 0
27 GCIRS 10W * 17 45 40.5305 -29 00 23.001           ~ 48 0
28 OH 359.946 -0.047 OH* 17 45 40.63 -29 00 23.5           O-rich 60 0
29 GCIRS 10E * 17 45 40.65 -29 00 23.8           ~ 18 0
30 GCIRS 5 * 17 45 40.700 -29 00 18.51           ~ 57 0
31 GCIRS 5S3 IR 17 45 40.759 -29 00 20.93           ~ 1 0
32 GCIRS 5S2 IR 17 45 40.774 -29 00 20.80           ~ 1 0
33 GCIRS 5S1 IR 17 45 40.788 -29 00 20.81           ~ 2 0
34 GCIRS 5SE1 IR 17 45 40.856 -29 00 21.36           ~ 6 0
35 GCIRS 5SE IR 17 45 40.870 -29 00 21.48           ~ 4 0
36 GCIRS 5E IR 17 45 40.875 -29 00 18.96           ~ 7 0
37 GCIRS 5SE2 IR 17 45 40.887 -29 00 21.56           ~ 4 0
38 GCIRS 5E1 IR 17 45 40.931 -29 00 19.62           ~ 1 0
39 GCIRS 5NE IR 17 45 41.020 -29 00 17.66           ~ 6 0
40 GCIRS 5E2 IR 17 45 41.056 -29 00 18.24           ~ 2 0
41 GCIRS 5NE2 IR 17 45 41.056 -29 00 18.24           ~ 1 0
42 GCIRS 5NE1 IR 17 45 41.092 -29 00 18.52           ~ 1 0
43 * ksi Her LP* 17 57 45.8857114 +29 14 52.367509 5.34 4.64 3.70 3.01 2.55 G8.5III 231 0
44 * 11 Cep PM* 21 41 55.3084514088 +71 18 41.267467908       3.9   K0.5III 142 0
45 * iot Cep PM* 22 49 40.8169435 +66 12 01.463616 5.50 4.60 3.54 2.69 2.19 K0-III 239 0
46 [BEB76] IRS 5S IR ~ ~           ~ 2 0

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2023.01.29-17:46:54

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