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Pulsation Powered by Deuterium Burning in Brown Dwarfs and Very-Low-Mass Stars

Cody, Ann Marie (2009) Pulsation Powered by Deuterium Burning in Brown Dwarfs and Very-Low-Mass Stars. In: Stellar pulsation : challenges for theory and observation. AIP conference proceedings. No.1170. American Institute of Physics , Melville, NY, pp. 630-634. ISBN 978-0-7354-0707-7 .

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Pulsation powered by deuterium burning in brown dwarfs and very low mass stars has been put forth (Palla & Baraffe 2005) as a novel probe of the interiors of these objects in the 1–15 Myr age range. Previous observations have hinted at variability on the expected timescales of a few hours, suggesting but not confirming that the phenomenon is at work in young brown dwarfs. We have recently carried out a dedicated campaign to search for this putative class of pulsators among known low-mass members of five young star clusters. Our survey achieves sensitivity to periodic oscillations with photometric amplitudes down to several millimagnitudes. We present the census of variability over timescales ranging from minutes to days and discuss the current prospects for pulsation as a tool in the study of young, objects near the substellar boundary. As a byproduct, this work provides new insights into the distribution of stellar rotation periods at young ages via the detection of variability due to cool surface spots.

Item Type:Book Section
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URLURL TypeDescription DOIArticle
Cody, Ann Marie0000-0002-3656-6706
Additional Information:© 2009 American Institute of Physics. Issue Date: 16 September 2009.
Subject Keywords:brown dwarfs; low-mass stars; star clusters; stellar pulsations; stellar photometry; light curves
Classification Code:PACS: 97.20.Vs; 98.65.-r; 95.55.Qf
Record Number:CaltechAUTHORS:20100817-135047712
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Official Citation:Pulsation Powered by Deuterium Burning in Brown Dwarfs and Very-Low-Mass Stars Ann Marie Cody, AIP Conf. Proc. 1170, 630 (2009), DOI:10.1063/1.3246575
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:19476
Deposited By: Tony Diaz
Deposited On:17 Aug 2010 23:53
Last Modified:24 Oct 2017 23:59

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