Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.14/43799
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- Title
- Sydney observatory Galactic survey : potential for detection of extreme disk-crossing stars
- Related
- Astronomy and astrophysics, Vol. 469, p.1221-1229
- DOI
- 10.1051/0004-6361:20077153
- Publisher
- EDP Sciences
- Date
- 2007
- Author/Creator
- Fresneau, A
- Author/Creator
- Vaughan, A. E
- Author/Creator
- Argyle, R. W
- Description
- Context: First Epoch astrometric and radiometric information of a survey in the optical along the Galactic fourth quadrant is archived for further analysis in the time-domain. Aims: A photographic survey of 1.9 x 10⁶ stars down to B-magnitude 14 ± 0.5 along the galactic meridian l = (330 ± 5)°, -64° ≤ b ≤ -7° and along the galactic equator 272° ≤ l ≤ 341°, ∣b∣ ≤ 7°, is provided from century old astrographic plates of Sydney Observatory. Stellar candidates to investigate the Galaxy disk kinematics up to a distance of 1 kpc from the Sun are tentatively selected. Methods: The early data are combined with late epoch observations into a set of 4.8 x 10⁵ stars with significant proper motion μ ≥ 0.005´´ yr⁻¹ and approximate color B-V. The selection effects and the kinematical bias on the stellar system are investigated. F-G stellar candidates with a mean transverse velocity dispersion of 45 km s⁻¹ are suggested. Results: The spin rate of ½° pc⁻¹ of the velocity ellipsoid along its long axis is observed over half a thickness of 25 pc of the galactic disk for stars at an estimated distance D ≤ 300 pc from the Sun. Conclusions: A catalogue of 4.8 x 10⁵ stars is provided for further investigation of the galactic disk heating by transient spiral wave or by GMC encounter.
- Description
- 9 page(s)
- Subject Keyword
- surveys
- Subject Keyword
- stars - kinematics
- Resource Type
- journal article
- Organisation
- Macquarie University. Dept. of Physics
- Identifier
- http://hdl.handle.net/1959.14/43799
- Identifier
- ISSN:0004-6361
- Identifier
- mq-rm-2007004107
- Language
- eng
- Rights
- Copyright 2007 EDP Sciences, First published in Astronomy and astrophysics, Volume 469, published by EDP Sciences. The original article can be found at http://dx.doi.org/10.1051/0004-6361:20077153.
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