1996/11/21 by Yoshiaki Sofue · 4 citations
Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Disc galaxy #Galaxy #Galaxy formation and evolution #Galaxy rotation curve #Geometry #Line (geometry) #Luminous infrared galaxy #Peculiar galaxy #Physics #RADIUS #Rotation (mathematics) #Scientific Research and Discoveries #astro-ph
paper · pdf · doi:10.1093/pasj/49.1.17
To appear in PASJ vol.49, No.1, 1997, Plain TeX
arxiv created 1996/11/21 · openalex publication_date 1997/02/01 · arxiv updated 2015/06/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We have derived rotation curves of nearby galaxies, which are almost completely sampled from the inner to outer regions. We used high-resolution position–velocity diagrams in the CO line along the major axes for the inner regions, and HI-line data for the outer regions. We combined the CO and HI data to obtain total rotation curves from the nuclear to outer regions. The rotation curves show a steep nuclear rise within a radius smaller than the resolutions of the CO-line observations, indicating a compact massive concentration near the nucleus. We show that the nuclear steep rise is general and universal, and that a rigid body-like gentle rise is exceptional.