2019ApJS..244....6S


Query : 2019ApJS..244....6S

2019ApJS..244....6S - Astrophys. J., Suppl. Ser., 244, 6-6 (2019/September-0)

The gas kinematics, excitation, and chemistry, in connection with star formation, in lenticular galaxies.

SIL'CHENKO O.K., MOISEEV A.V. and EGOROV O.V.

Abstract (from CDS):

We present long-slit and panoramic spectroscopy of extended gaseous disks in 18 S0 galaxies, mostly in groups. The gas has often decoupled kinematics: at least five galaxies demonstrate strongly inclined large-scale ionized gas disks, seven galaxies reveal circumnuclear polar disks, and in NGC 2551 the ionized gas, although confined to the main plane, counterrotates the stars. The gas excitation analysis reveals ionization by young stars in 12 of 18 S0 galaxies; current star formation in these galaxies is confined to ring-like zones coinciding with their UV rings. Gas oxygen abundances in the rings are around 0.7 Z and correlate neither with the ring radius nor with the metallicity of the stellar population. By applying tilted ring analysis to the velocity fields, we have traced the gas rotation plane lines of nodes along the radius. We find that current star formation proceeds usually where the gas lies strictly in the stellar disk planes and rotates circularly; the sense of the gas rotation does not matter (the counterrotating gas in NGC 2551 forms stars). In the galaxies without current star formation the extended gaseous disks either are in steady-state quasi-polar orientation or were acquired recently through the misaligned external filaments provoking shock-like excitation. Our data imply a crucial difference of the accretion regime in S0s with respect to spirals: the geometry of gas accretion in S0s is typically off-plane.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: ISM - galaxies: kinematics and dynamics

Simbad objects: 25

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Number of rows : 25
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 NGC 252 GiG 00 48 01.5069897792 +27 37 26.093379360   13.4 12.49     ~ 81 0
2 NGC 774 LIN 01 59 34.7353817064 +14 00 29.546396964   13.97       ~ 71 1
3 SN 2006ee SN* 01 59 35.40 +14 00 19.6     17.6     SNII 28 1
4 NGC 2551 GiG 08 24 50.2699218936 +73 24 43.353747900   13.10 12.11     ~ 76 1
5 NGC 2697 GiG 08 54 59.3978707968 -02 59 15.332314380   13.6       ~ 34 0
6 NGC 2655 LIN 08 55 37.731 +78 13 23.10   12.03 11.08     ~ 277 1
7 NGC 2787 LIN 09 19 18.6046606656 +69 12 11.630716128   12.92 11.79     ~ 334 0
8 NGC 2962 GiP 09 40 53.9321546928 +05 09 57.032828496   13.1       ~ 193 0
9 NGC 3106 LIN 10 04 05.2518653088 +31 11 07.659854232   14.0       ~ 90 0
10 NGC 3165 GiG 10 13 31.2940552872 +03 22 29.994311784   14.5       ~ 61 0
11 NGC 3166 GiP 10 13 45.7270131936 +03 25 29.310401424   11.2       ~ 226 0
12 NGC 3169 GiP 10 14 15.0379414272 +03 27 57.941639856   13.46 12.41     ~ 349 1
13 NGC 3182 Sy2 10 19 33.0239134272 +58 12 20.586154752   13.0       ~ 102 0
14 NGC 3414 GiP 10 51 16.2099174408 +27 58 30.297624852   12.1       ~ 313 0
15 NGC 3619 GiG 11 19 21.5781353400 +57 45 28.018459368   12.6       ~ 160 0
16 NGC 4026 GiP 11 59 25.0914676128 +50 57 41.951225700   12.17       ~ 249 0
17 NGC 4324 GiG 12 23 06.1747492368 +05 15 01.229253372   12.5       ~ 190 0
18 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6355 0
19 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4137 4
20 UGC 9519 G 14 46 21.127 +34 22 14.34   14.4       ~ 90 0
21 NAME Ursa Major Cluster ClG 15 08.8 +67 07           ~ 405 0
22 NGC 7280 GiP 22 26 27.5758899936 +16 08 53.421593496   13.6       ~ 154 0
23 IC 5285 G 23 06 58.9445029080 +22 56 11.310244008   14.4       ~ 42 0
24 UGC 12840 GiG 23 54 29.9264852640 +28 52 17.485292568   14.30       ~ 49 0
25 NAME Galactic Bulge reg ~ ~           ~ 3965 0

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2022.11.26-10:50:37

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