Huber, Jeremy M. and Kielkopf, John F. and Mengel, Matthew and Carter, Bradley D. and Ferland, Gary J. and Clark, Frank O. (2018) A young solar twin in the Rosette cluster NGC 2244 line of sight. Monthly Notices of the Royal Astronomical Society, 476 (1). pp. 323-335. ISSN 0035-8711
|
Text (Published Version)
sty188.pdf Download (2204Kb) | Preview |
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.
|
Statistics for this ePrint Item |
| Item Type: | Article (Commonwealth Reporting Category C) |
|---|---|
| Refereed: | Yes |
| Item Status: | Live Archive |
| Additional Information: | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©2018 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
| Faculty / Department / School: | Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences |
| Date Deposited: | 17 Jul 2018 01:01 |
| Last Modified: | 26 Sep 2018 00:01 |
| Uncontrolled Keywords: | stars: distances, stars: solar-type, H II regions |
| Fields of Research : | 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems |
| Socio-Economic Objective: | E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences |
| Identification Number or DOI: | 10.1093/mnras/sty188 |
| URI: | http://eprints.usq.edu.au/id/eprint/34449 |
Actions (login required)
 |
Archive Repository Staff Only |