The 13CO Distribution and Correlation with Extinction in L134

Astronomy and Astrophysics – Astronomy

Scientific paper

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Galaxies: Clustering, Galaxies: Intergalactic Medium

Scientific paper

We mapped the 13CO line in the dark nebula L134 using the 14-m Taeduck radio telescope with a 57 arcsec beam and one beam spacing. The cloud has a spherical shape with an intensity peak ridge extended from the northwest to the southeast directions. The halfwidth and the radial velocity of the lines peak at the region of the cloud center. The radial velocity decreases from the cloud center towards the north and south directions. The integrated line intensity distributions in the space-velocity plane show some structure and a velocity gradient. The 13CO and H2CO clouds and dark clouds are closely related in space in shape, outer boundary, and intensity peak positions. The 13CO integrated line intensity is linearly proportional to the visual extinction.

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