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  • Roberts, Lewis C. (author)

CHARACTERIZATION OF THE COMPANION mu HER

  • Article/chapterEnglish2016

Publisher, publication year, extent ...

  • 2016-06-01
  • American Astronomical Society,2016
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:su-132494
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-132494URI
  • https://doi.org/10.3847/0004-6256/151/6/169DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • mu Her is a nearby quadruple system with a G-subgiant primary and several low-mass companions arranged in a 2+2 architecture. While the BC components have been well characterized, the Ab component has been detected astrometrically and with direct imaging but there has been some confusion over its nature, in particular, whether the companion is stellar or substellar. Using near-infrared spectroscopy, we are able to estimate the spectral type of the companion as an M4 +/- 1V star. In addition, we have measured the astrometry of the system for over a decade. We combined the astrometry with archival radial velocity measurements to compute an orbit of the system. From the combined orbit, we are able to compute the mass sum of the system. Using the estimated mass of the primary, we estimate the mass of the secondary as 0.32 MG, which agrees with the estimated spectral type. Our computed orbit is preliminary due to the incomplete orbital phase coverage, but it should be sufficient to predict ephemerides over the next decade.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Mason, Brian D. (author)
  • Aguilar, Jonathan (author)
  • Carson, Joseph (author)
  • Crepp, Justin (author)
  • Beichman, Charles (author)
  • Brenner, Douglas (author)
  • Burruss, Rick (author)
  • Cady, Eric (author)
  • Luszcz-Cook, Statia (author)
  • Dekany, Richard (author)
  • Hillenbrand, Lynne (author)
  • Hinkley, Sasha (author)
  • King, David (author)
  • Lockhart, Thomas G. (author)
  • Nilsson, RickyStockholms universitet,Institutionen för astronomi,American Museum of Natural History, USA(Swepub:su)rini5313 (author)
  • Oppenheimer, Rebecca (author)
  • Parry, Ian R. (author)
  • Pueyo, Laurent (author)
  • Rice, Emily L. (author)
  • Sivaramakrishnan, Anand (author)
  • Soummer, Remi (author)
  • Vasisht, Gautam (author)
  • Veicht, Aaron (author)
  • Wang, Ji (author)
  • Zhai, Chengxing (author)
  • Zimmerman, Neil T. (author)
  • Stockholms universitetInstitutionen för astronomi (creator_code:org_t)

Related titles

  • In:Astronomical Journal: American Astronomical Society151:60004-62561538-3881

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