Global structure and kinematics of the spiral galaxy NGC 2841

Citation
Vl. Afanasiev et Ok. Sil'Chenko, Global structure and kinematics of the spiral galaxy NGC 2841, ASTRONOM J, 117(4), 1999, pp. 1725-1732
Citations number
27
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMICAL JOURNAL
ISSN journal
00046256 → ACNP
Volume
117
Issue
4
Year of publication
1999
Pages
1725 - 1732
Database
ISI
SICI code
0004-6256(199904)117:4<1725:GSAKOT>2.0.ZU;2-0
Abstract
Investigation of gaseous and stellar kinematics and of broadband VRI and na rrowband H alpha and [N II] lambda 6583 images is performed for the central part of the regular spiral galaxy NGC 2841 (R < 4 kpc). We found emission- line splitting at R<20" and a three-component line-of-sight velocity distri bution (LOSVD) for the stars in the radial range 6" to 100". Morphological analysis reveals strong narrow shock fronts dose to the major axis in the r adial range from 30" to 50", a turn of 5 degrees in the isophote major axis , and a strongly negative Fourier coefficient a(4) (boxy isophotes) in the radial range from 15" to 33". In principle, all these features may be expla ined in the context of a triaxial bulge hypothesis.