OH in the Line of Sight to HD 27778 and zeta Persei

Details OH in the Line of Sight to HD 27778 and zeta Persei OH in the Line of Sight to HD 27778 and zeta Persei

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...465l..57f&link_type=abstract

Astrophysical Journal Letters v.465, p.L57

Astronomy and Astrophysics

Astronomy

15

Ism: Abundances, Ism: Molecules, Line: Identification, Stars: Individual Constellation Name: Zeta Persei

Scientific paper

We present ground-based observations with the coude spectrograph of the Canada-France-Hawaii Telescope aimed at revealing the presence of OH in the cloud located in front of HD 27778. The 3070--3080 A spectral range was successfully studied and exhibited the presence of five transitions of OH located around 3072.0, 3078.4, and 3081.7 A toward zeta Per and HD 27778. The deduced column density of OH in zeta Per confirms the previous results of Chaffee & Lutz and is equal to 1014 cm-2 in HD 27778. An inversion in the populations of the Lamda doublet ground level is found in this line of sight. We also detected lines at 3072.9 A which we tentatively identify as due to the presence of Ti II in two different atomic clouds, as was already found by Stokes toward zeta Per with a somewhat lower column density.

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