Velocity fields in the southern barred spirals NGC 613, 1097, 1313 and 1365
1981; Oxford University Press; Volume: 195; Issue: 3 Linguagem: Inglês
10.1093/mnras/195.3.451
ISSN1365-2966
Autores Tópico(s)Astronomy and Astrophysical Research
ResumoThe velocity fields of NGC 613, 1097, 1313 and 1365 have been investigated by means of a total of 17 long-slit spectrograms. The nuclei of NGC 613 and NGC 1097 were found to be rotating faster than the underlying bars, confirming and extending earlier work by Burbidge et al. (1964) and by Burbidge & Burbidge (1960). Lindblad's observations of the nucleus of NGC 1365, combined with measurements of the outer points described here suggest that a similar situation occurs in this galaxy. These observations imply that bars are primarily density wave features. Mass estimates for the nuclei of NGC 613 and 1097 are |$6\times 10^9 M_\odot$| (|$r\lt 0.7$| kpc) and |$7\times 10^9 M_\odot$| (|$r\lt 0.3$| kpc) respectively.
Referência(s)