2007A&A...469..993M


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.12CET11:54:52

2007A&A...469..993M - Astronomy and Astrophysics, volume 469, 993-1002 (2007/7-3)

First proper motions of thin dust filaments at the Galactic center.

MUZIC K., ECKART A., SCHOEDEL R., MEYER L. and ZENSUS A.

Abstract (from CDS):

L'-band (3.8µm) images of the Galactic center show a large number of thin filaments in the mini-spiral, located west of the mini-cavity and along the inner edge of the Northern Arm. One possible mechanism that could produce such structures is the interaction of a central wind with the mini-spiral. Additionally, we identify similar features that appear to be associated with stars. We present the first proper motion measurements of the thin dust filaments observed in the central parsec around SgrA* and investigate possible mechanisms that could be responsible for the observed motions. The observations have been carried out using the NACO adaptive optics system at the ESO VLT. The images have been transformed to a common coordinate system and features of interest were extracted. Then a cross-correlation technique could be performed in order to determine the offsets between the features with respect to their position in the reference epoch. We derive the proper motions of a number of filaments and 2 cometary shaped dusty sources close (in projection) to SgrA*. We show that the shape and the motion of the filaments does not agree with a purely Keplerian motion of the gas in the potential of the supermassive black hole at the position of SgrA*. Therefore, additional mechanisms must be responsible for their formation and motion. We argue that the properties of the filaments are probably related to an outflow from the disk of young mass-losing stars around SgrA*. In part, the outflow may originate from the black hole itself. We also present some evidence and theoretical considerations that the outflow may be collimated.

Abstract Copyright:

Journal keyword(s): Galaxy: center - infrared: ISM - ISM: jets and outflows - accretion, accretion disks

Nomenclature: Figs 2-3, Table 1: [MES2007] WWNa (Nos SW1-SW5, SW5a-SW5b, SW6-SW8, NE1-NE4), [MES2007] XN (Nos X1-X7).

Simbad objects: 47

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Number of rows : 47

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 [MES2007] NE1 ? 07 45 35.280 -29 00 24.70           ~ 2 0
2 [GWC93] 29 Rad 17 42 25.1 -30 08 03           ~ 2 0
3 [GWC93] 38 Rad 17 42 34.8 -30 00 46           ~ 4 0
4 [MES2007] SW3 ? 17 45 33.961 -29 00 27.35           ~ 2 0
5 [MES2007] SW4 ? 17 45 34.971 -29 00 29.88           ~ 2 0
6 [MES2007] SW5a ? 17 45 35.841 -29 00 25.81           ~ 1 0
7 [MES2007] SW5b ? 17 45 35.911 -29 00 25.37           ~ 1 0
8 [MES2007] SW5 ? 17 45 36.041 -29 00 25.61           ~ 2 0
9 [MES2007] SW7 ? 17 45 36.971 -29 00 23.02           ~ 2 0
10 GCIRS 30E IR 17 45 39.55 -29 00 22.0           ~ 2 0
11 GCIRS 6E WR* 17 45 39.632 -29 00 27.05           Ofpe/WN9 59 0
12 GCIRS 2 Em* 17 45 39.7540 -29 00 32.880           ~ 64 0
13 GCIRS 13 Em* 17 45 39.76 -29 00 29.8           ~ 123 0
14 GCIRS 2L * 17 45 39.778 -29 00 32.11           ~ 22 0
15 GCIRS 3 * 17 45 39.80 -29 00 23.9           ~ 137 0
16 [MES2007] X3 ? 17 45 39.85 -29 00 30.5           ~ 12 0
17 GCIRS 12N * 17 45 39.86 -29 00 35.7           M0III 53 0
18 GCIRS 7 * 17 45 39.987 -29 00 22.24           M2 337 0
19 [EG97] S50 * 17 45 40.00 -29 00 28.6           ~ 13 0
20 [MES2007] SW1 ? 17 45 40.0 -29 00 28           ~ 2 0
21 NAME Galactic Circumnuclear Disk PoG 17 45 40.0 -29 00 28           ~ 104 0
22 GCIRS 16 Cl* 17 45 40.0 -29 00 28           ~ 295 0
23 [MES2007] X5 ? 17 45 40.0 -29 00 28           ~ 2 0
24 [MES2007] X4 ? 17 45 40.0 -29 00 28           ~ 2 0
25 [MES2007] NE2 ? 17 45 40.0 -29 00 28           ~ 2 0
26 [MES2007] SW6 ? 17 45 40.0 -29 00 28           ~ 2 0
27 [MES2007] SW8 ? 17 45 40.0 -29 00 28           ~ 2 0
28 [MES2007] X6 ? 17 45 40.0 -29 00 28           ~ 2 0
29 [MES2007] SW2 ? 17 45 40.0 -29 00 28           ~ 2 0
30 [MES2007] X2 ? 17 45 40.0 -29 00 28           ~ 2 0
31 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 3293 3
32 GCIRS 33N s*b 17 45 40.0381 -29 00 30.302           B0.5/1I 35 0
33 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11085 0
34 NAME Sgr A West Northern Arm PoG 17 45 40.1 -29 00 28           ~ 22 0
35 GCIRS 16C WR* 17 45 40.12 -29 00 27.6           Ofpe/WN9 163 1
36 GCIRS 16SW WR* 17 45 40.123 -29 00 29.09           Ofpe/WN9 140 0
37 GCIRS 15NE WR* 17 45 40.15 -29 00 16.5           WN8/9 52 0
38 GCIRS 16CC s*b 17 45 40.1939 -29 00 27.532           O9.5/B0.5I 51 0
39 GCIRS 9 LP* 17 45 40.447 -29 00 34.49           M3III 98 0
40 [MES2007] NE4 ? 17 45 40.5410 -29 00 26.488           ~ 2 0
41 GCIRS 1SE * 17 45 40.614 -29 00 28.55           ~ 15 0
42 GCIRS 1NE * 17 45 40.626 -29 00 26.55           M3III 19 0
43 [TVH89] 179 OH* 17 45 40.63 -29 00 23.5           ~ 56 0
44 GCIRS 28 * 17 45 40.80 -29 00 33.7           M6III 35 0
45 GCIRS 17 * 17 45 41.0377 -29 00 22.611           ~ 29 0
46 [MES2007] NE3 ? 17 45 42.6600 -29 00 28.028           ~ 2 0
47 [MES2007] X1 ? 17 45 43.261 -29 00 31.52           ~ 3 0

    Equat.    Gal    SGal    Ecl

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2019.12.12-11:54:52

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