The First Optical Spectroscopy of Red LSB Galaxies, and the Possible Discovery of the Largest Galaxy Known

Details The First Optical Spectroscopy of Red LSB Galaxies, and the Possible Discovery of the Largest Galaxy Known The First Optical Spectroscopy of Red LSB Galaxies, and the Possible Discovery of the Largest Galaxy Known

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.5807o&link_type=abstract

American Astronomical Society, 197th AAS Meeting, #58.07; Bulletin of the American Astronomical Society, Vol. 32, p.1501

Astronomy and Astrophysics

Astronomy

Scientific paper

We will present results from the first optical spectra obtained of red (B-V > 1) low surface brightness galaxies, taken with the Palomar 5m telescope. Four of the observed galaxies were previously detected with the Arecibo 305m telescope and were known to be nearby (v < 10,000 km s-1), red (B-V > 1), LSB systems. Redshift was not a priori known for the fifth galaxy ([IBM88] V2L8), which is also unique in the sample in that it is only the small (2'') nucleus of the galaxy which is red -- the surrounding region has a B-V color of 0.5. Previous HST WFPC2 studies of this galaxy suggested it may lie well behind the Virgo Cluster (of which it is often considered a member). Our spectroscopic studies appear to confirm this idea, placing the galaxy at a velocity of 31,060 km s-1. If this velocity is correct, V2L8 exceeds Malin 1 as the largest galaxy known. Only the Hα , NII, and SII lines are visible in all five galaxies, while the O[II], O[III], and Hg are visible in three of the galaxies, and Hβ can be found in only two. Detailed spectral analysis of all five galaxies will be presented.

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