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New BVI_C Photometry of Low-mass Pleiades Stars: Exploring the Effects of Rotation on Broadband Colors

Kamai, Brittany L. and Vrba, Frederick J. and Stauffer, John R. and Stassun, Keivan G. (2014) New BVI_C Photometry of Low-mass Pleiades Stars: Exploring the Effects of Rotation on Broadband Colors. Astronomical Journal, 148 (2). Art. No. 30. ISSN 0004-6256. https://resolver.caltech.edu/CaltechAUTHORS:20140818-102337912

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Abstract

We present new BVI_C photometry for 350 Pleiades proper motion members with 9 < V ≾ 17. Importantly, our new catalog includes a large number of K- and early M-type stars, roughly doubling the number of low-mass stars with well-calibrated Johnson/Cousins photometry in this benchmark cluster. We combine our new photometry with existing photometry from the literature to define a purely empirical isochrone at Pleiades age (≈100 Myr) extending from V = 9 to 17. We use the empirical isochrone to identify 48 new probable binaries and 14 likely nonmembers. The photometrically identified single stars are compared against their expected positions in the color-magnitude diagram (CMD). At 100 Myr, the mid K and early M stars are predicted to lie above the zero-age main sequence (ZAMS) having not yet reached the ZAMS. We find in the B – V versus V CMD that mid K and early M dwarfs are instead displaced below (or blueward of) the ZAMS. Using the stars' previously reported rotation periods, we find a highly statistically significant correlation between rotation period and CMD displacement, in the sense that the more rapidly rotating stars have the largest displacements in the B – V CMD.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1088/0004-6256/148/2/30DOIArticle
http://iopscience.iop.org/1538-3881/148/2/30/PublisherArticle
http://arxiv.org/abs/1407.0357arXivDiscussion Paper
ORCID:
AuthorORCID
Kamai, Brittany L.0000-0001-6521-9351
Stauffer, John R.0000-0003-3595-7382
Stassun, Keivan G.0000-0002-3481-9052
Alternate Title:New BVIC Photometry of Low-mass Pleiades Stars: Exploring the Effects of Rotation on Broadband Colors
Additional Information:© 2014 American Astronomical Society. Received 2014 February 16; accepted 2014 May 12; published 2014 June 27. B.L.K. is supported by the NSF Graduate Research Fellowship DGE-0909667. B.L.K. and K.G.S. acknowledge NSF PAARE AST-0849736. B.L.K. acknowledges the Science Support Consortium and MK&FC for their endorsement.
Funders:
Funding AgencyGrant Number
NSF Graduate Research FellowshipDGE-0909667
NSFAST-0849736
Subject Keywords: catalogs; Hertzsprung-Russell and C-M diagrams; open clusters and associations: individual (Pleiades); stars: low-mass; stars: rotation; starspots
Issue or Number:2
Record Number:CaltechAUTHORS:20140818-102337912
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140818-102337912
Official Citation:New BVI C Photometry of Low-mass Pleiades Stars: Exploring the Effects of Rotation on Broadband Colors Brittany L. Kamai et al. 2014 The Astronomical Journal 148 30
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48651
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:19 Aug 2014 21:59
Last Modified:03 Oct 2019 07:06

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