Parameters for a close binary system

Parameters for a close binary system

Postby Tom Love » Fri Feb 12, 2021 11:16 pm

Radial velocity measurements on a close binary system with young stars, with spectroscopic observations mostly from a professional observatory but supplemented with some data from my Lhires (when we didn't quite get the curve coverage we needed from our time allocation on the big telescope). This project is leading to some further binary star work with both professional and Lhires data.

The high degree of rotational broadening of the lines in these objects means that for practical purposes resolutions of much more than about R=10,000 or so don't add very much precision to RV measurements. Nobody really gets to precision of better than about 5km/s on these systems, so there's good scope for studies with typical amateur equipment. Though of course there are more unobserved bright systems on this side of the sky than there are in the Northern Hemisphere...

https://arxiv.org/abs/2102.00362
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Martinborough, New Zealand. Alpy, Lhires RC12
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Re: Parameters for a close binary system

Postby Robin Leadbeater » Sat Feb 13, 2021 8:20 pm

Interesting to see Visual Spec software being used in the analysis.

Robin
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
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Re: Parameters for a close binary system

Postby Tom Love » Sat Feb 13, 2021 11:58 pm

We used it for some of the blended line fits. The person I am working with had previously used IRAF for this, but once I introduced him to VSpec he decided that it was easier to use for some things.
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Martinborough, New Zealand. Alpy, Lhires RC12
Tom Love
 
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Re: Parameters for a close binary system

Postby Peter Velez » Tue Feb 23, 2021 6:42 am

Great work Tom

those lonely nights up at the observatory have paid dividends.

I look forward to reading this closely (and repeatedly to help it go in).

Pete
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