Molecular hydrogen abundance in the dust-free damped Ly-alpha galaxy at z = 3.4

Details Molecular hydrogen abundance in the dust-free damped Ly-alpha galaxy at z = 3.4 Molecular hydrogen abundance in the dust-free damped Ly-alpha galaxy at z = 3.4

2000-11-25

arxiv.org/abs/astro-ph/0011470v1

Astronomy and Astrophysics

Astrophysics

4 pages, 1 eps figure, to appear in Proceed. ESO/ST-ECF/STScI Workshop on Deep Fields, held in Garching, 9-12 October 2000

Scientific paper

10.1007/10854354_95

New results from the search for H2 absorption in the damped Ly-alpha galaxy at redshift z = 3.4 toward QSO 0000-2620 (z_em = 4.1) are reported. The high-resolution (lambda/Delta lambda = 48,000) spectra of Q0000-2620 were obtained using the Ultraviolet - Visual Echelle Spectrograph (UVES) on the 8.2m ESO Kueyen telescope. The ortho-H2 column density is found to be N(J=1) = (5.55 +/- 1.35) 10^{13} cm^{-2} (2sigma C.L.). The combination of N(J=1) with the limits available for other low rotational levels restricts the excitation temperature T_ex in the range (290-540) K. This gives the total H2 column density of N(H2) = (8.75 +/- 1.25) 10^{13} cm^{-2} and the corresponding fraction of hydrogen atoms bound in molecules of f(H2) = (6.8 +/- 2.0) 10^{-8}.

Affiliated with

Also associated with

No associations

Rating

Molecular hydrogen abundance in the dust-free damped Ly-alpha galaxy at z = 3.4 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 Molecular hydrogen abundance in the dust-free damped Ly-alpha galaxy at z = 3.4, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Molecular hydrogen abundance in the dust-free damped Ly-alpha galaxy at z = 3.4 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-61361