Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...181.4509h&link_type=abstract
American Astronomical Society, 181st AAS Meeting, #45.09; Bulletin of the American Astronomical Society, Vol. 24, p.1193
Astronomy and Astrophysics
Astronomy
2
Scientific paper
NGC 2537 (Mk 86, Arp 220) is a nearby, low luminosity blue compact dwarf galaxy with a highly distorted morphology. Broadband UBVr and narrow-band Hα images were obtained with the 2.3-m Steward Observatory Telescope. Long slit spectra (resolutions Delta lambda ~ 1 and 5 Angstroms ) at two slit position angles (45 and 90 deg.) have been obtained with the 4.5 Multiple Mirror Telescope and CCD spectrograph. A strong narrow emission-line spectrum, characteristic of an HII region is observed in the 6500 Angstroms to 7200 Angstroms region. The [NII] lines appear double with a separation of ~ 120 km s(_1) , comparable to the velocity doubling observed in the HI 21-cm spectrum of NGC 2537 (Thuan and Martin 1981). Measurements of the velocity of the emission-line gas as a function of spatial position are presented for the two slit position angles, and compared with the imaging data. Velocity measurements of the redshift of NGC 2537A, eliminates the possibility of a physical interaction between the two galaxies.
Heyd Rodney
Wyckoff Susan
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