2007MNRAS.378..163H


Query : 2007MNRAS.378..163H

2007MNRAS.378..163H - Mon. Not. R. Astron. Soc., 378, 163-178 (2007/June-2)

Kinematics of gas and stars in the circumnuclear star-forming ring of NGC 3351.

HAGELE G.F., DIAZ A.I., CARDACI M.V., TERLEVICH E. and TERLEVICH R.

Abstract (from CDS):

We have measured gas and stellar velocity dispersions in five circumnuclear star-forming regions (CNSFRs) and the nucleus of the barred spiral galaxy NGC3351. The stellar dispersions have been obtained from high-resolution spectra of the CaII triplet (CaT) lines at λλ8494, 8542, 8662Å, while the gas velocity dispersions have been measured by Gaussian fits to the Hβ λ4861Å line on high-dispersion spectra.

The CNSFRs, with sizes of about 100 to 150pc in diameter, are seen to be composed of several individual star clusters with sizes between 1.7 and 4.9pc on a Hubble Space Telescope (HST) image. Using the stellar velocity dispersions, we have derived dynamical masses for the entire star-forming complexes and for the individual star clusters. Values of the stellar velocity dispersions are between 39 and 67km/s. Dynamical masses for the whole CNSFRs are between 4.9x106 and 4.3x107M and between 1.8 and 8.7x106M for the individual star clusters.

Stellar and gas velocity dispersions are found to differ by about 20km/s with the Hβ lines being narrower than both the stellar lines and the [OIII]λ5007Å lines. We have found indications for the presence of two different kinematical components in the ionized gas of the regions. The radial velocity curve shows deviation from circular motions for the ionized hydrogen consistent with its infall towards the central regions of the galaxy at a velocity of about 25km/s. To disentangle the origin of these two components it will be necessary to map these regions with high spectral and spatial resolution and much better signal-to-noise ratio in particular for the O2+ lines.


Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): HII regions - galaxies: individual: NGC3351 - galaxies: kinematics and dynamics - galaxies: starburst - galaxies: star clusters

Nomenclature: Table 4: [PCP97] NGC 3351 RNa (Nos R4-R6, R2a, R3a-R3f, R6a-R6q) added.

Errata: erratum vol. 385, p. 543 (2008)

Simbad objects: 49

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Number of rows : 49
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 * 81 Cet PM* 02 37 41.8017736241 -03 23 46.226718262   6.674 5.647     K0III 72 1
2 HD 22007 * 03 32 48.4472448313 -00 30 09.606646661   9.35 8.49     G6/8IV 17 0
3 HD 22156 * 03 36 04.5497784107 +46 35 04.146426119   8.42 7.32     G6III 13 0
4 NAME NGC 1569 CL* A Cl* 04 30 48.2 +64 50 59   15.45 15.22     ~ 100 1
5 NGC 1569 IG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1182 3
6 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15589 1
7 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1822 1
8 HD 71952 PM* 08 32 33.4471902951 +53 06 53.450085479   7.252 6.226     K0IV 39 0
9 * 33 Sex PM* 10 41 24.1859207379 -01 44 29.366215211   7.145 6.250     G9IV 157 0
10 [PCP97] NGC 3351 R2a HII 10 43 57.120 +11 42 08.53           ~ 1 0
11 [PCP97] NGC 3351 R3a HII 10 43 57.160 +11 41 59.24           ~ 1 0
12 [PCP97] NGC 3351 R3b HII 10 43 57.180 +11 41 58.93           ~ 1 0
13 [PCP97] NGC 3351 R3f HII 10 43 57.200 +11 41 59.26           ~ 1 0
14 [PCP97] NGC 3351 R3e HII 10 43 57.200 +11 41 59.71           ~ 1 0
15 [PCP97] NGC 3351 R3d HII 10 43 57.210 +11 41 59.33           ~ 1 0
16 [PCP97] NGC 3351 R3c HII 10 43 57.210 +11 41 59.41           ~ 1 0
17 NGC 3351N HII 10 43 57.290 +11 42 05.81           ~ 1 0
18 [PCP97] NGC 3351 R4 HII 10 43 57.320 +11 42 00.92           ~ 5 0
19 [PCP97] NGC 3351 R5 HII 10 43 57.550 +11 42 02.50           ~ 6 0
20 [PCP97] NGC 3351 R6q HII 10 43 57.560 +11 42 05.48           ~ 1 0
21 [PCP97] NGC 3351 R6 HII 10 43 57.600 +11 42 05.21           ~ 5 0
22 [PCP97] NGC 3351 R6p HII 10 43 57.610 +11 42 04.81           ~ 1 0
23 [PCP97] NGC 3351 R6k HII 10 43 57.610 +11 42 05.41           ~ 1 0
24 [PCP97] NGC 3351 R6m HII 10 43 57.610 +11 42 05.43           ~ 1 0
25 [PCP97] NGC 3351 R6g HII 10 43 57.610 +11 42 06.12           ~ 1 0
26 [PCP97] NGC 3351 R6l HII 10 43 57.610 +11 42 06.31           ~ 1 0
27 [PCP97] NGC 3351 R6j HII 10 43 57.620 +11 42 05.66           ~ 1 0
28 [PCP97] NGC 3351 R6d HII 10 43 57.620 +11 42 05.86           ~ 1 0
29 [PCP97] NGC 3351 R6b HII 10 43 57.620 +11 42 06.00           ~ 1 0
30 [PCP97] NGC 3351 R6f HII 10 43 57.620 +11 42 06.21           ~ 1 0
31 [PCP97] NGC 3351 R6a HII 10 43 57.620 +11 42 06.81           ~ 1 0
32 [PCP97] NGC 3351 R6o HII 10 43 57.630 +11 42 04.83           ~ 1 0
33 [PCP97] NGC 3351 R6n HII 10 43 57.630 +11 42 05.52           ~ 1 0
34 [PCP97] NGC 3351 R6c HII 10 43 57.630 +11 42 06.38           ~ 1 0
35 [PCP97] NGC 3351 R6h HII 10 43 57.630 +11 42 06.52           ~ 1 0
36 [PCP97] NGC 3351 R6i HII 10 43 57.640 +11 42 06.13           ~ 1 0
37 [PCP97] NGC 3351 R6e HII 10 43 57.650 +11 42 06.85           ~ 1 0
38 M 95 GiP 10 43 57.69173 +11 42 13.6274 10.71 10.51 9.73 9.48   ~ 989 2
39 [PCP97] NGC 3351 R2 HII 10 43 57.8 +11 42 17           ~ 8 0
40 [PCP97] NGC 3351 R3 HII 10 43 57.9 +11 42 07           ~ 6 0
41 HD 102165 * 11 45 28.0955138260 -21 28 26.359408715   8.33 7.81     F7V 28 0
42 NGC 4314 LIN 12 22 31.978 +29 53 43.09 11.72 11.43 10.58     ~ 460 1
43 HD 115004 PM* 13 13 42.9421158340 +40 09 10.377447760   5.99 4.94     G8.5IIICN0.5 88 0
44 * 65 Vir * 13 23 18.8935461847 -04 55 27.941367936   7.304 5.858     K4III 29 0
45 * omi Boo PM* 14 45 14.4602643 +16 57 51.407805 6.33 5.58 4.60 3.87 3.39 G8.5III 122 0
46 HD 134047 * 15 07 40.3228981930 +05 29 53.008619428   7.10 6.17     G7IIIa:Fe-0.5: 33 0
47 HD 144063 * 16 02 56.3440792372 +28 57 19.908610187   9.45 8.43     K0 13 0
48 NGC 7714 GiP 23 36 14.099 +02 09 18.07   14.91 14.36     ~ 741 1
49 APG 284 PaG 23 36 19 +02 09.3   12.6       ~ 605 0

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2021.10.21-00:38:12

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