Skip to content Skip to navigation
University of Warwick
  • Study
  • |
  • Research
  • |
  • Business
  • |
  • Alumni
  • |
  • News
  • |
  • About

University of Warwick
Publications service & WRAP

Highlight your research

  • WRAP
    • Home
    • Search WRAP
    • Browse by Warwick Author
    • Browse WRAP by Year
    • Browse WRAP by Subject
    • Browse WRAP by Department
    • Browse WRAP by Funder
    • Browse Theses by Department
  • Publications Service
    • Home
    • Search Publications Service
    • Browse by Warwick Author
    • Browse Publications service by Year
    • Browse Publications service by Subject
    • Browse Publications service by Department
    • Browse Publications service by Funder
  • Help & Advice
University of Warwick

The Library

  • Login
  • Admin

The HYPER-MUCHFUSS project - the constant high-velocity population

Tools
- Tools
+ Tools

Tillich, A., Geier, S., Heber, U., Hirsch, H., Maxted, P. F. L., Marsh, Tom, Gaensicke, B. T., Napiwotzki, Ralf, Otensen, R. and Scholz, R.-D. (2010) The HYPER-MUCHFUSS project - the constant high-velocity population. Astrophysics and Space Science, Vol.329 (No.1-2). pp. 69-76. doi:10.1007/s10509-010-0342-x

Research output not available from this repository, contact author.
Official URL: http://dx.doi.org/10.1007/s10509-010-0342-x

Request Changes to record.

Abstract

The HYPER-MUCHFUSS (HYPER-velocity stars or Massive Unseen Companions of Hot Faint Underluminous Stars from SDSS) project targets a population of high-velocity subluminous B stars to discover either close binaries with massive unseen companions or hyper-velocity stars. We re-observed high-velocity subdwarf selected candidates from the SDSS spectroscopic Data Release 6. Starting in 2007 we used several instruments and have now reached a completion level of 33% (from 265 targets), whereas we found at least 16 close binaries. Here we present results for two of our 39 hyper-velocity star candidates. From the available Digitized Sky Surveys photographic plates we measured a significant proper motion for 14 stars. Combining this information with a detailed spectroscopic analysis allows for the first time a complete determination of the 3D-trajectories for a high-velocity sample. We present our preliminary results for the two subdwarfs J1644+4523 and J1211+1437. Assuming the Standard Allen and Santillan (Rev. Mex. Astron. Astrofis. 22:255, 1991) potential the first one is bound and originates in the central region of the Galaxy. The subdwarf B star J1211+1437 is possibly unbound and seems to originate in the Galactic rim. We also performed numerical kinematical experiments with increased dark matter halo mass. and found that the origin of J1644+4523 in the central region is not changed but the time-of-flight is drastically shortened. J1211+1437 would be bound and probably belongs to population II.

Item Type: Journal Article
Subjects: Q Science > QA Mathematics
Q Science > QB Astronomy
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Kinematics, B stars, Double stars
Journal or Publication Title: Astrophysics and Space Science
Publisher: Springer
ISSN: 0004-640X
Official Date: October 2010
Dates:
DateEvent
October 2010Published
Volume: Vol.329
Number: No.1-2
Number of Pages: 8
Page Range: pp. 69-76
DOI: 10.1007/s10509-010-0342-x
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: Deutsche Forschungsgemeinschaft (DFG)
Grant number: HE1356/45-1 (DFG), HE1356/49-1 (DFG), HE1356/44-1 (DFG), HE1356/48-1 (DFG), HE1356/50-1 (DFG)

Data sourced from Thomson Reuters' Web of Knowledge

Request changes or add full text files to a record

Repository staff actions (login required)

View Item View Item
twitter

Email us: wrap@warwick.ac.uk
Contact Details
About Us