2016A&A...586A..98V


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.15CEST14:08:09

2016A&A...586A..98V - Astronomy and Astrophysics, volume 586A, 98-98 (2016/2-1)

The flaring HI disk of the nearby spiral galaxy NGC 2683.

VOLLMER B., NEHLIG F. and IBATA R.

Abstract (from CDS):

New deep VLA D array HI observations of the highly inclined nearby spiral galaxy NGC 2683 are presented. Archival C array data were processed and added to the new observations. To investigate the 3D structure of the atomic gas disk, we made different 3D models for which we produced model HI data cubes. The main ingredients of our best-fit model are (i) a thin disk inclined by 80°; (ii) a crude approximation of a spiral and/or bar structure by an elliptical surface density distribution of the gas disk; (iii) a slight warp in inclination between 10kpc≤R≤20kpc (decreasing by 10°); (iv) an exponential flare that rises from 0.5kpc at R=9kpc to 4kpc at R=15kpc, stays constant until R=22kpc, and decreases its height for R>22kpc; and (v) a low surface-density gas ring with a vertical offset of 1.3kpc. The slope of NGC 2683's flare is comparable, but somewhat steeper than those of other spiral galaxies. NGC 2683's maximum height of the flare is also comparable to those of other galaxies. On the other hand, a saturation of the flare is only observed in NGC 2683. Based on the comparison between the high resolution model and observations, we exclude the existence of an extended atomic gas halo around the optical and thin gas disk. Under the assumption of vertical hydrostatic equilibrium we derive the vertical velocity dispersion of the gas. The high turbulent velocity dispersion in the flare can be explained by energy injection by (i) supernovae; (ii) magneto-rotational instabilities; (iii) interstellar medium stirring by dark matter substructure; or (iv) external gas accretion. The existence of the complex large-scale warping and asymmetries favors external gas accretion as one of the major energy sources that drives turbulence in the outer gas disk. We propose a scenario where this external accretion leads to turbulent adiabatic compression that enhances the turbulent velocity dispersion and might quench star formation in the outer gas disk of NGC 2683.

Abstract Copyright:

Journal keyword(s): galaxies: individual: NGC 2683 - galaxies: ISM - galaxies: kinematics and dynamics

VizieR on-line data: <Available at CDS (J/A+A/586/A98): list.dat fits/*>

Simbad objects: 20

goto Full paper

goto View the reference in ADS

Number of rows : 20

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 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10960 1
2 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 2936 2
3 M 74 G 01 36 41.772 +15 47 00.46 10.52 10.00 9.46 9.16   ~ 1410 1
4 NGC 891 H2G 02 22 32.907 +42 20 53.95 11.08 10.81 9.93 7.86   ~ 1527 2
5 ICRF J054236.1+495107 Sy1 05 42 36.13789843 +49 51 07.2337251   18.45 17.80 17.210   ~ 1270 1
6 NGC 2403 AGN 07 36 51.396 +65 36 09.17 9.31 8.84 8.38 8.19   ~ 1613 1
7 NGC 2613 EmG 08 33 22.841 -22 58 25.21   11.29 10.42 9.75 10.5 ~ 155 0
8 NGC 2683 AGN 08 52 41.345 +33 25 18.48 11.57 10.68 9.79 9.38   ~ 385 1
9 ICRF J090933.4+425346 Sy2 09 09 33.49711097 +42 53 46.4818256   19.98 19.42 18.220   ~ 462 0
10 NGC 2841 LIN 09 22 02.655 +50 58 35.32 10.43 10.09 9.22     ~ 990 1
11 NGC 2983 GiG 09 43 41.1168740539 -20 28 38.068699194   12.81 11.68 11.25   ~ 69 0
12 NGC 3198 EmG 10 19 54.990 +45 32 58.88 10.83 10.87 10.33     ~ 818 1
13 M 95 GiP 10 43 57.733 +11 42 13.00 10.71 10.51 9.73 9.48   ~ 942 2
14 NGC 4228 SBG 12 15 39.174 +36 19 36.80 10.63 10.30 9.93 9.74   ~ 865 1
15 UGC 7321 EmG 12 17 34.021 +22 32 23.35   14.07   13.21   ~ 227 0
16 NGC 4559 H2G 12 35 57.6399424117 +27 57 35.859639262   10.46 10.01     ~ 534 1
17 NGC 4565 LIN 12 36 20.804 +25 59 14.61   13.61 12.43     ~ 873 0
18 M 94 SyG 12 50 53.148 +41 07 12.55 9.15 8.96 8.24 7.78   ~ 1221 3
19 NGC 5746 GiP 14 44 56.005 +01 57 17.06   12.3       ~ 324 0
20 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2245 2

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2016A&A...586A..98V and select 'bookmark this link' or equivalent in the popup menu


2020.08.15-14:08:09

© Université de Strasbourg/CNRS

    • Contact