delta Sco - next periastron

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Ernst Pollmann
Posts: 461
Joined: Mon Sep 26, 2011 7:16 pm

delta Sco - next periastron

Post by Ernst Pollmann »

On behalf of Anatoly Miroshnichenko:
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Dear colleagues,
Please find attached a presentation about a spectroscopic campaign to observe the next periastron passage of the bright binary system with the primary Be component Delta Scorpii. Please pass this information to any colleagues, who may be interested or could contribute to the campaign.
I'm going to take the first spectrum of the object today and would appreciate it if you can send me reduced data in the form (geocentric wavelength, spectrum not normalized to the local continuum).
Contemporaneous spectroscopy of any radial velocity standard stars (such as HR 4540, HR 5694, or HR 6603) can be helpful for controlling the wavelength calibration.
Thank you!
Best regards,
Anatoly
deltasco.png
deltasco.png (152.23 KiB) Viewed 3757 times
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Ernst Pollmann
Ernst Pollmann
Posts: 461
Joined: Mon Sep 26, 2011 7:16 pm

Re: delta Sco - next periastron

Post by Ernst Pollmann »

Dear colleagues,
Halpha radial velocity measurements of delta Sco are urgend required to determine the exact periastron time and to clarify the enigmatic RV dip linked with the question of a third body within that system. As it is seen, this RV dip have been first time observed during the campaign 2011.
Please try to observe the star as long as possible. Spectra should uploaded at BeSS.
RV_2000_2011_2022.png
RV_2000_2011_2022.png (124.14 KiB) Viewed 3221 times
Ernst Pollmann
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