Sign on

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· arXiv e-print (arXiv:astro-ph/0605617)
· On-line Data
· References in the article
· Citations to the Article (56) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (11)
· Associated Articles
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
The Monitor project: rotation of low-mass stars in the open cluster M34
Authors:
Irwin, Jonathan; Aigrain, Suzanne; Hodgkin, Simon; Irwin, Mike; Bouvier, Jerome; Clarke, Cathie; Hebb, Leslie; Moraux, Estelle
Affiliation:
AA(Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA), AB(Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA), AC(Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA), AD(Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA), AE(Laboratoire d'Astrophysique, Observatoire de Grenoble, BP 53, F-38041 Grenoble Cédex 9, France), AF(Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA), AG(School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS), AH(Laboratoire d'Astrophysique, Observatoire de Grenoble, BP 53, F-38041 Grenoble Cédex 9, France)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 370, Issue 2, pp. 954-974. (MNRAS Homepage)
Publication Date:
08/2006
Origin:
MNRAS
Astronomy Keywords:
techniques: photometric: surveys: stars: rotation: open clusters and associations: individual: M34, techniques: photometric, surveys, stars: rotation, open clusters and associations: individual: M34
DOI:
10.1111/j.1365-2966.2006.10521.x
Bibliographic Code:
2006MNRAS.370..954I

Abstract

We report on the results of a V- and i-band time-series photometric survey of M34 (NGC 1039) using the Wide Field Camera (WFC) on the Isaac Newton Telescope (INT), achieving better than 1 per cent precision per data point for 13 <~ i <~ 17. Candidate cluster members were selected from a V versus V - I colour-magnitude diagram over 14 < V < 24 (0.12 <~ M/Msolar <~ 1.0), finding 714 candidates, of which we expect ~400 to be real cluster members (taking into account contamination from the field). The mass function was computed, and found to be consistent with a lognormal distribution in dN/d logM. Searching for periodic variable objects in the candidate members gave 105 detections over the mass range 0.25 < M/Msolar < 1.0. The distribution of rotation periods for 0.4 < M/Msolar < 1.0 was found to peak at ~7d, with a tail of fast rotators down to periods of ~0.8d. For 0.25 < M/Msolar < 0.4 we found a peak at short periods, with a lack of slow rotators (e.g. P >~ 5d), consistent with the work of other authors at very low masses. Our results are interpreted in the context of previous work, finding that we reproduce the same general features in the rotational period distributions. A number of rapid rotators were found with velocities ~ a factor of 2 lower than in the Pleiades, consistent with models of angular momentum evolution assuming solid body rotation without needing to invoke core-envelope decoupling.

Associated Articles

Source Paper     Catalog Description    


Printing Options

Send high resolution image to Level 2 Postscript Printer
Send low resolution image to Level 2 Postscript Printer
Send low resolution image to Level 1 Postscript Printer
Get high resolution PDF image
Get low resolution PDF
Send 300 dpi image to PCL Printer
Send 150 dpi image to PCL Printer


More Article Retrieval Options

HELP for Article Retrieval


Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)

  New!

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints