# From clouds to protoplanetary disks: the astrochemical link

4-8 October 2015
Hans Harnack Haus
Europe/Berlin timezone
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Poster session

# Deuterium Fractionation in the Taurus Molecular Cloud

## Speakers

• Ms. Anna PUNANOVA

## Content

In this work we measure the deuterium fraction towards dense cores along the filamentary structure L1495 in the Taurus molecular cloud to investigate how different environmental conditions affect the deuterium fractionation. For this study, ${\rm N_2H^+(1-0)}$ and ${\rm N_2D^+(2-1)}$ on-the-fly maps of 13 cores were used to measure the deuterium fraction and reveal the kinematics of the cores. Observations were performed with the IRAM 30-meter telescope. Most of the cores have moderate deuterium fractions (10-25%). The velocity gradient of 0.3-0.5 km s$^{-1}$ was found across most of the cores, which shows the possible presence of rotation. Correlation between deuterium fraction and distance to the nearest young stellar objects (YSOs) embedded in the cloud will be discussed to understand if YSOs affect the pre-stellar cores evolution. The results will be compared to the results of similar study toward the dense cores in L1688, the Ophiuchus molecular cloud.