The Library
Two rings but no fellowship : LoTr 1 and its relation to planetary nebulae possessing barium central stars
Tools
Tyndall, A. A. , Jones, D., Boffin, H. M. J. , Miszalski, B. , Faedi, F. , Lloyd, M. , Boumis, P. , Lopez, J. A. , Martell, S. , Pollacco, Don and Santander-Garcia, M. (2013) Two rings but no fellowship : LoTr 1 and its relation to planetary nebulae possessing barium central stars. Monthly Notices of the Royal Astronomical Society , Volume 436 (Number 3). pp. 2082-2095. doi:10.1093/mnras/stt1713 ISSN 0035-8711.
Research output not available from this repository.
Request-a-Copy directly from author or use local Library Get it For Me service.
Official URL: http://dx.doi.org/10.1093/mnras/stt1713
Abstract
LoTr 1 is a planetary nebula thought to contain an intermediate-period binary central star system (that is, a system with an orbital period, P, between 100 and, say, 1500 d). The system shows the signature of a K type, rapidly rotating giant and most likely constitutes an accretion-induced post-mass-transfer system similar to other PNe, such as LoTr 5, WeBo 1 and A70. Such systems represent rare opportunities to further the investigation into the formation of barium stars and intermediate-period post-asymptotic giant branch systems – a formation process still far from being understood. Here, we present the first detailed analyses of both the central star system and the surrounding nebula of LoTr 1 using a combination of spectra obtained with Very Large Telescope-Focal Reducer and low dispersion Spectrograph, Anglo-Australian Telescope-UCL Coudé Echelle Spectrograph and New Technology Telescope-European Southern Observatory Multi-Mode Instrument, as well as SuperWASP (Wide Angle Search for Planets) photometry. We confirm the binary nature of the central star of LoTr 1 that consists of a K1 III giant and a hot white dwarf. The cool giant does not present any sign of s-process enhancement but is shown to have a rotation period of 6.4 d, which is a possible sign of mass accretion. LoTr 1 also presents broad double-peaked Hα emission lines, whose origin is still unclear. The nebula of LoTr 1 consists in two slightly elongated shells, with ages of 17 000 and 35 000 yr, respectively, and with different orientations. As such, LoTr 1 present a very different nebular morphology than A70 and WeBo 1, which may be an indication of difference in the mass-transfer episodes.
Item Type: | Journal Article | ||||
---|---|---|---|---|---|
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||
Publisher: | Oxford University Press | ||||
ISSN: | 0035-8711 | ||||
Official Date: | 2013 | ||||
Dates: |
|
||||
Volume: | Volume 436 | ||||
Number: | Number 3 | ||||
Page Range: | pp. 2082-2095 | ||||
DOI: | 10.1093/mnras/stt1713 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |