New BVI_C Photometry of Low-mass Pleiades Stars: Exploring the Effects of Rotation on Broadband Colors
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.
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.Attached Files
Published - 1538-3881_148_2_30.pdf
Submitted - 1407.0357.pdf
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Additional details
- Alternative title
- New BVIC Photometry of Low-mass Pleiades Stars: Exploring the Effects of Rotation on Broadband Colors
- Eprint ID
- 48651
- Resolver ID
- CaltechAUTHORS:20140818-102337912
- DGE-0909667
- NSF Graduate Research Fellowship
- AST-0849736
- NSF
- Created
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2014-08-19Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field