A small spiral galaxy discovered at 21 centimeters in a cosmic void

Details A small spiral galaxy discovered at 21 centimeters in a cosmic void A small spiral galaxy discovered at 21 centimeters in a cosmic void

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...347l...1h&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 347, Dec. 1, 1989, p. L1-L4.

Astronomy and Astrophysics

Astronomy

11

Radio Sources (Astronomy), Red Shift, Spiral Galaxies, Brightness Distribution, Centimeter Waves, Radio Emission, Ubv Spectra, Very Large Array (Vla)

Scientific paper

Redshift surveys of magnitude-limited samples of galaxies show that there are large volumes of space that are devoid of bright galaxies. However, the distribution of low surface brightness, faint objects is not as well determined by these surveys. Over 500 lines of sight through the void at alpha between 23 h and 01 h, delta between 30 deg and 33 deg have been searched for sources of 21 cm emission, using the NRAO 300 foot (91 m) telescope. A source well in front of the back wall of the void was discovered. Follow-up observations with the VLA and the Kitt Peak 4 m telescope indicate that this object is a small, low surface brightness spiral galaxy.

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