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Titolo:
A SURVEY OF THE STELLAR ROTATION IN BARRED GALAXIES
Autore:
BETTONI D; GALLETTA G;
Indirizzi:
OSSERV ASTRON PADOVA,VICOLO OSSERVATORIO 5 I-35122 PADUA ITALY UNIV PADUA,DIPARTIMENTO ASTRON I-35122 PADUA ITALY
Titolo Testata:
Astronomy & Astrophysics. Supplement series
fascicolo: 1, volume: 124, anno: 1997,
pagine: 61 - 74
SICI:
0365-0138(1997)124:1<61:ASOTSR>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTERSTELLAR MATTER; KINEMATICS; CATALOG; GAS; BARS; SB0; COMPONENTS; DYNAMICS;
Keywords:
GALAXIES, KINEMATICS AND DYNAMICS; GALAXIES, ELLIPTIC AND LENTICULAR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
32
Recensione:
Indirizzi per estratti:
Citazione:
D. Bettoni e G. Galletta, "A SURVEY OF THE STELLAR ROTATION IN BARRED GALAXIES", Astronomy & Astrophysics. Supplement series, 124(1), 1997, pp. 61-74

Abstract

We present stellar velocity- and velocity dispersion- data for 13 SBOgalaxies and one SBa, based on 61 spectra collected during a long-term project developed at ESO. Our primary goal is to provide a database widest as possible for the study of the stellar velocity and velocity dispersion fields and for future modeling. New data are presented for six galaxies, while for the remaining SBOs particular kinematical aspects were already discussed in previous papers. We found the following results: a) emission lines were detected in our spectra only for;4 outof 14 galaxies considered. When present, they reveal a very peculiar kinematics, including counter-rotation, warps or radial flows. b),4 new case of gas counter-rotation has been found: NGC 7079. c) The velocity dispersion along the bar has a smoother trend than in the rest of the galaxy. However there is, in general, a similarity between the velocity dispersion trend (decreasing or flat) measured along the bar and that outside it. d) The existence of a waving pattern in the stellar rotation curves of bars is confirmed for the galaxies of our sample seen inclined between 30 and 50 degrees. In addition to this effect, the percentage of non-circular stellar motions present in the barred galaxies studied may reach the 20%.

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Documento generato il 03/12/20 alle ore 21:56:27