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SEEDS DIRECT IMAGIN...
SEEDS DIRECT IMAGING OF THE RV-DETECTED COMPANION TO V450 ANDROMEDAE, AND CHARACTERIZATION OF THE SYSTEM
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Helminiak, K. G. (author)
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Kuzuhara, M. (author)
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Mede, K. (author)
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Brandt, T. D. (author)
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Kandori, R. (author)
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Suenaga, T. (author)
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Kusakabe, N. (author)
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Narita, N. (author)
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Carson, J. C. (author)
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Currie, T. (author)
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Kudo, T. (author)
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Hashimoto, J. (author)
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Abe, L. (author)
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Akiyama, E. (author)
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Brandner, W. (author)
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Feldt, M. (author)
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Goto, M. (author)
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Grady, C. A. (author)
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Guyon, O. (author)
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Hayano, Y. (author)
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Hayashi, M. (author)
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Hayashi, S. S. (author)
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Henning, T. (author)
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Hodapp, K. W. (author)
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Ishii, M. (author)
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Iye, M. (author)
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- Janson, Markus (author)
- Stockholms universitet,Institutionen för astronomi
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Knapp, G. R. (author)
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Kwon, J. (author)
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Matsuo, T. (author)
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McElwain, M. W. (author)
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Miyama, S. (author)
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Morino, J. -I. (author)
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Moro-Martin, A. (author)
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Nishimura, T. (author)
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Ryu, T. (author)
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Pyo, T. -S. (author)
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Serabyn, E. (author)
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Suto, H. (author)
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Suzuki, R. (author)
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Takahashi, Y. H. (author)
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Takami, M. (author)
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Takato, N. (author)
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Terada, H. (author)
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Thalmann, C. (author)
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Turner, E. L. (author)
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Watanabe, M. (author)
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Wisniewski, J. (author)
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Yamada, T. (author)
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Takami, H. (author)
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Usuda, T. (author)
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Tamura, M. (author)
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(creator_code:org_t)
- 2016
- 2016
- English.
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In: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 832:1
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Subject headings
Close
- We report the direct imaging detection of a low-mass companion to a young, moderately active star V450. And, that was previously identified with the radial velocity (RV) method. The companion was found in high-contrast images obtained with the Subaru Telescope equipped with the HiCIAO camera and AO188 adaptive optics system. From the public ELODIE and SOPHIE archives we extracted available high-resolution spectra and RV measurements, along with RVs from the Lick planet search program. We combined our multi-epoch astrometry with these archival, partially unpublished RVs, and found that the companion is a low-mass star, not a brown dwarf, as previously suggested. We found the best-fitting dynamical masses to be m(1) = 1.141(-0.091)(+0.037)and m(2) = 0.279(-0.020)(+0.023) M-circle dot. We also performed spectral analysis of the SOPHIE spectra with the iSpec code. Hipparcos time-series photometry shows a periodicity of P = 5.743 day, which is also seen in the SOPHIE spectra as an RV modulation of the star A. We interpret it as being caused by spots on the stellar surface, and the star to be rotating with the given period. From the rotation and level of activity, we found that the system is 380(-100)(+220) Myr old, consistent with an isochrone analysis (220(-90)(+2120) Myr). This work may serve as a test case for future studies of low-mass stars, brown dwarfs, and exoplanets by combination of RV and direct imaging data.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- binaries: spectroscopic
- binaries: visual
- stars: imaging
- stars: individual (V450 And)
- stars: low-mass
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
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Helminiak, K. G.
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Kuzuhara, M.
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Mede, K.
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Brandt, T. D.
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Kandori, R.
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Suenaga, T.
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show more...
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Kusakabe, N.
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Narita, N.
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Carson, J. C.
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Currie, T.
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Kudo, T.
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Hashimoto, J.
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Abe, L.
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Akiyama, E.
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Brandner, W.
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Feldt, M.
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Goto, M.
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Grady, C. A.
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Guyon, O.
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Hayano, Y.
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Hayashi, M.
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Hayashi, S. S.
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Henning, T.
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Hodapp, K. W.
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Ishii, M.
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Iye, M.
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Janson, Markus
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Knapp, G. R.
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Kwon, J.
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Matsuo, T.
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McElwain, M. W.
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Miyama, S.
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Morino, J. -I.
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Moro-Martin, A.
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Nishimura, T.
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Ryu, T.
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Pyo, T. -S.
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Serabyn, E.
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Suto, H.
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Suzuki, R.
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Takahashi, Y. H.
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Takami, M.
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Takato, N.
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Terada, H.
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Thalmann, C.
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Turner, E. L.
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Watanabe, M.
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Wisniewski, J.
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Yamada, T.
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Takami, H.
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Usuda, T.
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Tamura, M.
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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Astrophysical Jo ...
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Stockholm University