The first H I-discovered galaxy in the Bootes void

Details The first H I-discovered galaxy in the Bootes void The first H I-discovered galaxy in the Bootes void

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....105..464s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 105, no. 2, p. 464-472.

Astronomy and Astrophysics

Astronomy

21

Disk Galaxies, Galactic Halos, H I Regions, Irregular Galaxies, Rotating Disks, Red Shift, Sky Surveys (Astronomy), Velocity Distribution

Scientific paper

We present a detailed study of the first H I-discovered galaxy in the Bootes void, at a distance of 145.5 Mpc. We have observed this galaxy both at low and high resolution in the 21 cm line and optically. The galaxy has an irregular, slowly rotating H I disk. The gas is much more extended than the optical disk, extending out as far as 6.4 times R25. The rotation curve of the galaxy is flat: amplitude and shape can be explained by the presence of a dark halo with a mass of 1.6 times the luminous mass.

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