Morphology and kinematics of the ionized gas in NGC 2997

Details Morphology and kinematics of the ionized gas in NGC 2997 Morphology and kinematics of the ionized gas in NGC 2997

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....95...59m&link_type=abstract

Astronomy and Astrophysics, vol. 95, no. 1, Feb. 1981, p. 59-65.

Astronomy and Astrophysics

Astrophysics

39

Galactic Rotation, Galactic Structure, Ionized Gases, Spiral Galaxies, Astronomical Catalogs, Astronomical Photography, Brightness, H Ii Regions, Milky Way Galaxy

Scientific paper

A catalogue of 382 H II regions of the spiral galaxy NGC 2997 has been drawn from the analysis of H-alpha plates obtained through a 16 A bandwidth filter with the 3.60 m ESO telescope. Their distribution size and intensity are discussed; one result is that the longer arm shows the more compact and brilliant H II regions, indicating a difference in physical conditions between the two arms. Furthermore two interferograms, in H-alpha light, made it possible to draw a rotation curve of the galaxy and to compute its mass as between 3.5 x 10 to the 10th and 3.8 x 10 to the 10th solar masses within the optical limit of 3 arcmin. Finally arguments are given favoring the excitation of the hot spots by very massive stars.

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