Detection of HCO+ Emission toward the Planetary Nebula K 3-35

Details Detection of HCO+ Emission toward the Planetary Nebula K 3-35 Detection of HCO+ Emission toward the Planetary Nebula K 3-35

2006-10-02

arxiv.org/abs/astro-ph/0610048v1

Astron.J.133:364-369,2007

Astronomy and Astrophysics

Astrophysics

16 pages, 6 figures, accepted in AJ, in press

Scientific paper

10.1086/509776

We report the detection, for the first time, of HCO+ (J=1-0) emission as well as marginal CO (J=1-0) emission toward the planetary nebula (PN) K3-35 as a result of a molecular survey carried out toward this source. We also report new observations of the previously detected CO (J=2-1) and water maser emission, as well as upper limits for the emission of the SiO, H13CO+, HNC, HCN, HC3OH, HC5N, CS, HC3N, 13CO, CN, and NH3 molecules. From the ratio of CO (J=2-1) to CO (J=1-0) emission we have estimated the kinetic temperature of the molecular gas, obtaining a value of ~20 K. Using this result, we have estimated a molecular mass for the envelope of ~ 0.017 M_Sun, and an HCO+ abundance relative to H_2 of 6 X 10^-7, similar to the abundances found in other PNe. K~3-35 is remarkable because it is one of the two PNe reported to exhibit water maser emission, which is present in the central region as well as at a distance of $\simeq$ 5000 AU away from the center. The presence of molecular emission provides some clues that could help to understand the persistence of water molecules in the envelope of K 3-35. The HCO$^{+}$ emission could be arising in dense molecular clumps, that may provide the shielding mechanism which protects water molecules in this source.

Affiliated with

Also associated with

No associations

Rating

Detection of HCO+ Emission toward the Planetary Nebula K 3-35 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Detection of HCO+ Emission toward the Planetary Nebula K 3-35, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection of HCO+ Emission toward the Planetary Nebula K 3-35 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-175784