Volume 416, Number 2, March III 2004
|Page(s)||647 - 654|
|Section||Stellar structure and evolution|
|Published online||27 February 2004|
A young and complex binary star – HD 144432
Los Alamos National Laboratory, PO Box 1663, ISR-DO, Mail Stop F650, Los Alamos, NM 87545, USA
2 Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS 42, Cambridge, MA 02138, USA e-mail: firstname.lastname@example.org
3 TNO-TPD, Stieltjesweg 1, PO Box 155, 2600 AD Delft, The Netherlands e-mail: email@example.com
4 The University of Toledo, Dept. of Physics and Astronomy, Toledo, OH 43606, USA e-mail: firstname.lastname@example.org
Corresponding author: M. R. Pérez, email@example.com
Accepted: 17 November 2003
The southern emission-line star HD 144432 has received considerable attention due to its relative brightness (), its late spectral type (late A-type or perhaps early F) and its relative isolation from a bona-fide active star formation region. We present new imaging and spectroscopic data of this star, which in the past has been classified as both an evolved (post-AGB) object and an isolated Herbig Ae/Be star. We confirm the presence of a faint companion source located 1.4´´ north, which appears physically associated with HD 144432. New infrared spectroscopy reveals this companion to be a late-type (early-mid K) star, devoid of any emission lines. Furthermore, we confirm the pre-main sequence nature of this object, report the detection of Li i 6707.8 Å absorption toward the HD 144432 system, and its apparent association with Sco OB2-2 located at 145 pc.
Key words: stars: circumstellar matter / stars: emission-line, Be / stars: individual: HD 144432 / stars: binaries: visual / stars: pre-main sequence
© ESO, 2004
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.