publication . Preprint . Article . 2013

Nitrogen Abundances and the Distance Moduli of the Pleiades and Hyades

Blake Miller; Jeremy R. King; Yu Chen; Ann M. Boesgaard;
Open Access English
  • Published: 06 Sep 2013
Abstract
Recent reanalyses of HIPPARCOS parallax data confirm a previously noted discrepancy with the Pleiades distance modulus estimated from main-sequence fitting in the color-magnitude diagram. One proposed explanation of this distance modulus discrepancy is a Pleiades He abundance that is significantly larger than the Hyades value. We suggest that, based on our theoretical and observational understanding of Galactic chemical evolution, nitrogen abundances may serve as a proxy for helium abundances of disk stars. Utilizing high-resolution near-UV Keck/HIRES spectroscopy, we determine N abundances in the Pleiades and Hyades dwarfs from NH features in the 3330 Ang regio...
Subjects
free text keywords: Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Astronomy and Astrophysics, Nitrogen, chemistry.chemical_element, chemistry, Spectroscopy, Disc, Moduli, Physics, Pleiades, Distance modulus, Stars, Astrophysics, Astronomy, Parallax
Related Organizations

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publication . Preprint . Article . 2013

Nitrogen Abundances and the Distance Moduli of the Pleiades and Hyades

Blake Miller; Jeremy R. King; Yu Chen; Ann M. Boesgaard;