The star-forming disk and CO bar in M101

Details The star-forming disk and CO bar in M101 The star-forming disk and CO bar in M101

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...366..432k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 366, Jan. 10, 1991, p. 432-442. Research supported by NSF.

Astronomy and Astrophysics

Astrophysics

49

Carbon Monoxide, Galactic Structure, Interstellar Gas, Spiral Galaxies, Star Formation, Emission Spectra, H Ii Regions, Interplanetary Magnetic Fields, Radial Distribution, Star Distribution

Scientific paper

Results are reported from an analysis of 164 CO (J = 1-0) spectra of the inner disk of M101, obtained using the 12-m NRAO telescope at Kitt Peak during April 1989. The data are presented in extensive tables, graphs, and contour maps and discussed in detail. A molecular-emission bar of length 2 arcmin is detected near the center of the galaxy. An offset of about 25 deg relative to the stellar bar seen in R-band images is shown to be consistent with a slowly rotating bar model, while the azimuthally averaged CO emission has a simple exponential radial distribution which differs significantly from the intermediate-radius excess seen in the H-alpha and FIR emission.

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