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[25.06] BIMA Array observations of Comets LINEAR (C/2002 T7) and NEAT (C/2001 Q4)

D. N. Friedel (U. Illinois), A. Remijan (NASA Goddard Space Flight Centeri, NRC Resident Research Associate), L. E. Snyder (U. Illinois, Urbana IL 61801), M. F. A'Hearn (U. Maryland), G. A. Blake (Division of Geological and Planetary Sciences; Division of Chemistry and Chemical Engineering Caltech), I. de Pater (UC, Berkeley), H. R. Dickel (U. Illinois), J. R. Forster (UC, Berkeley), M. R. Hogerheijde (Leiden Obs., The Netherlands), C. Kraybill (UC, Berkeley), L. W. Looney (U. Illinois), P. Palmer (U. Chicago), M. C. H. Wright (UC, Berkeley)

We present interferometric observations of Comets LINEAR (C/2002 T7) and NEAT (C/2001 Q4) by the Berkeley-Illinois-Maryland Association (BIMA) Array. During our observations of Comet LINEAR during 11-15 May 2004 we detected HCN with a total beam averaged column density of 2.1(11)x10¹³ cm^-2 and a production rate of 2.8(15)x10²⁷ s^-1, CH₃OH (methanol) with a total beam averaged column density of 3.0(7)x10¹⁴ cm^-2 and a production rate of 3.3(7)x10²⁸ s^-1, and CS with a total beam averaged column density of 4.4(14)x10¹² cm^-2 and a production rate of 4.9(16)x10²⁶ s^-1. We were also able to set upper limits for ¹³CO, SiO, HNC, HN¹³C, CH₃CN, C₂H₅OH (ethanol), C₂H₅CN (ethyl cyanide), and HCOOCH₃ (methyl formate) for Comet LINEAR.

During our observations of Comet NEAT during 19-23 May 2004 we detected HCN with a total beam averaged column density of 5.7(30)x10¹² cm^-2 and a production rate of 8.3(44)x10²⁶ s^-1 and CH₃OH with a total beam averaged column density of 8.8(52)x10¹³ cm^-2 and a production rate of 9.3(54)x10²⁷ s^-1. We were also able to set upper limits for CS, CH₃CN, and ¹³CO for Comet NEAT.

This work was partly funded by: NASA NAG5-4292, NAG5-4080, NAG5-8708, and NGT5-0083; NSF AST96-13998, AST96-13999, AST96-13716, AST96-15608, AST99-81363, AST02-28953; and the Universities of Illinois, Maryland, and California, Berkeley.

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Bulletin of the American Astronomical Society, 36 #4
© 2004. The American Astronomical Soceity.