Distance and total column density to the periodic radio star LSI + 61 deg 303

Details Distance and total column density to the periodic radio star LSI + 61 deg 303 Distance and total column density to the periodic radio star LSI + 61 deg 303

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....101.2126f&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 101, June 1991, p. 2126-2130.

Astronomy and Astrophysics

Astronomy

58

Gas Density, H I Regions, Radio Stars, Absorption Spectra, Carbon Monoxide, Distance, Emission Spectra, Hydrogen, Radio Emission

Scientific paper

New observations toward the periodic radio star LSI + 61 deg 303 in the lines of H I at 21 cm and CO-18 at 2.7 mm are reported. Using the kinematic method, H I observations are interpreted in terms of the two-armed spiral shock model of Roberts (1972) to derive a distance to LSI + 61 deg 303 of 2.0 + or - 0.2 kpc. The results clearly show the presence of the Perseus arm shock and locate LSI + 61 deg 303 between this shock and the more distant postshock gas. In addition, by using the H I and CO-18 data, the total neutral and molecular gas column density is derived along the line of sight toward LSI + 61 deg 303.

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