Interferometric Observations of Formaldehyde in the Protoplanetary Disk around LkCa 15

Creators: Aikawa, Yuri; Momose, Munetake; Thi, Wing-Fai; van Zadelhoff, Gerd-Jan; Qi, Chunhua; Blake, Geoffrey A.; van Dishoeck, Ewine F.

Abstract

Emission from the 2_(12)–1_(11) line of H_2CO has been detected and marginally resolved toward LkCa 15 by the Nobeyama Millimeter Array. The column density of H_2CO is higher than that observed in DM Tau and than predicted by theoretical models of disk chemistry; also, the line-intensity profile is less centrally peaked than that for CO. A similar behavior is observed in other organic gaseous molecules in the LkCa 15 disk.

Additional Information

© 2003 Astronomical Society of Japan. Received 2002 October 6; accepted 2002 December 13. We are grateful to the staff of the Nobeyama Radio Observatory (NRO) for both operating the Millimeter Array and helping us with data reduction. Y.A. is supported by the Grant-in-Aid for Scientific Research of the Ministry of Education, Culture, Sports, Science and Technology of Japan (14740130). Astrochemistry in Leiden is supported by a SPINOZA grant from the Netherlands Organization for Scientific Research (NWO). G.A.B. gratefully acknowledges support from the NASA Exobiology and Origins of Solar Systems programs.

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Interferometric Observations of Formaldehyde in the Protoplanetary Disk around LkCa 15

Abstract

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