New upper limits on the interstellar O2 abundance

Details New upper limits on the interstellar O2 abundance New upper limits on the interstellar O2 abundance

1997-09-03

arxiv.org/abs/astro-ph/9709026v1

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures, Letter accepted in Astron. & Astrophys

Scientific paper

We report new observations of molecular oxygen in absorption at z=0.685 in front of the radio source B0218+357. The lines at 56.3 and 118.7 GHz have been observed, redshifted to 33.4 and 70.5 GHz respectively, with the 12m at Kitt Peak, 43m at Green Bank telescopes, and the 45m Nobeyama radio telescope. Deriving the surface filling factor of the absorbing dark cloud with other lines detected at nearby frequencies, we deduce from the upper limits on the O2 lines a relative abundance of molecular oxygen with respect to carbon monoxyde of O2/CO $\la$ 2 10$^{-3}$ at 1$\sigma$, seven times lower than the previous limit. The consequences of this result are discussed.

Affiliated with

Also associated with

No associations

Rating

New upper limits on the interstellar O2 abundance 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 New upper limits on the interstellar O2 abundance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New upper limits on the interstellar O2 abundance will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-604642