Increased H${}_2$CO production in the outer disk around HD 163296

M. T. Carney, M. R. Hogerheijde, R. A. Loomis +4

Three formaldehyde lines were observed (H${}_2$CO 3${}_{03}$--2${}_{02}$, H${}_2$CO 3${}_{22}$--2${}_{21}$, and H${}_2$CO 3${}_{21}$--2${}_{20}$) in the protoplanetary disk around the Herbig Ae star…