NGC 6868 - A merger with dust and extended LY alpha emission

Details NGC 6868 - A merger with dust and extended LY alpha emission NGC 6868 - A merger with dust and extended LY alpha emission

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...243...49h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 243, no. 1, March 1991, p. 49-55. Research supported by Danish Board for Astro

Astronomy and Astrophysics

Astronomy

16

Cosmic Dust, H Alpha Line, Lyman Alpha Radiation, Ultraviolet Astronomy, Active Galaxies, Charge Coupled Devices, Image Processing, Ionized Gases, Line Of Sight

Scientific paper

IUE observations of the E2 galaxy NGC 6868 showing extended Ly-alpha emission and a weak UV continuum source which also seems extended are presented. Along the lines of sight to the Ly-alpha clouds the column density of neutral hydrogen must be extremely low. Ground based CCD imaging shows the distribution of interstellar dust lane weak, spiral-like absorption features are detected suggesting a recent merger event. The observed Ly-alpha/H-alpha ratio is larger than unity. The UV source may be sufficiently strong to ionize the line emitting clouds.

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