Clues to Substellar Formation: Rotation and the Low-Mass End of the Initial Mass Function

Bibcode
2004Ap&SS.292..673Z
DOI
10.1023/B:ASTR.0000045074.68528.fc
Zapatero Osorio, María Rosa; Caballero, J.; Martín, E. L.; Béjar, V. J. S.; Rebolo, R.
Bibliographical reference

Astrophysics and Space Science, v. 292, Issue 1, p. 673-679 (2004).

Advertised on:
8
2004
Journal
Astrophysics and Space Science
Number of authors
5
IAC number of authors
3
Citations
3
Refereed citations
3
Description
We have monitored S Ori 45, a young, low-mass (20 M j up) brown dwarf of the σ Orionis cluster (˜3 Myr, 352 pc), using optical and near-infrared filters. S Ori 45 (spectral type M8.5) is found to be multi-periodic with a dominant modulation at 2.5 3.5 h, and a short modulation at about 46 min. We ascribe the longer of these modulations to a rotation period. After comparing these results with observations of more massive cluster brown dwarfs and field brown dwarfs, we conclude that substellar objects present rotational and angular momentum evolution.
Type
Non-refereed
Young star clusters

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