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Abstract
Based on prior precision photometry and cluster age analysis, the bright star GSC 00154−01819 is a possible young pre-main sequence member of the Rosette cluster, NGC 2244. As part of a comprehensive study of the large-scale structure of the Rosette and its excitation by the cluster stars, we noted this star as a potential backlight for a probe of the interstellar medium and extinction along the sight line towards a distinctive nebular feature projected on to the cluster centre. New high-resolution spectra of the star were taken with the University College London Echelle Spectrograph of the AAT. They reveal that rather than being a reddened spectral type B or A star within the Mon OB2 association, it is a nearby, largely unreddened, solar twin of spectral type G2V less than 180 Myr old. It is about 219 pc from the Sun with a barycentric radial velocity of +14.35 ± 1.99 km s−1. The spectrum of the Rosette behind it and along this line of sight shows a barycentric radial velocity of +26.0 ± 2.4 km s−1 in H α, and a full width at half-maximum velocity dispersion of 61.94 ± 1.38 km s−1.
Document Type
Article
Publication Date
1-24-2018
Digital Object Identifier (DOI)
https://doi.org/10.1093/mnras/sty188
Funding Information
JMH and JFK acknowledge support from the National Aeronautics and Space Administration (NASA) Kentucky Space Grant Consortium and its Graduate Fellowship program.
Repository Citation
Huber, Jeremy M.; Kielkopf, John F.; Mengel, Matthew; Carter, Bradley D.; Ferland, Gary J.; and Clark, Frank O., "A Young Solar Twin in the Rosette Cluster NGC 2244 Line of Sight" (2018). Physics and Astronomy Faculty Publications. 566.
https://uknowledge.uky.edu/physastron_facpub/566
Notes/Citation Information
Published in Monthly Notices of the Royal Astronomical Society, v. 476, issue 1, p. 323-335.
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
The copyright holders have granted the permission for posting the article here.