HIGH-CONTRAST IMAGING OF INTERMEDIATE-MASS GIANTS WITH LONG-TERM RADIAL VELOCITY TRENDS

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Ryu, Tsuguru (author)

HIGH-CONTRAST IMAGING OF INTERMEDIATE-MASS GIANTS WITH LONG-TERM RADIAL VELOCITY TRENDS

Article/chapterEnglish2016

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2016
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LIBRIS-ID:oai:DiVA.org:su-134295
https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-134295URI
https://doi.org/10.3847/0004-637X/825/2/127DOI

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Language:English
Summary in:English

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

Notes

A radial velocity (RV) survey for intermediate-mass giants has been in operation for over a decade at Okayama Astrophysical Observatory (OAO). The OAO survey has revealed that some giants show long-term linear RV accelerations (RV trends), indicating the presence of outer companions. Direct-imaging observations can help clarify what objects generate these RV trends. We present the results of high-contrast imaging observations of six intermediate-mass giants with long-term RV trends using the Subaru Telescope and HiCIAO camera. We detected co-moving companions to gamma Hya B (0.61(-0.14)(+0.12)M(circle dot)), HD 5608 B (0.10 +/- 0.01M(circle dot)), and HD 109272 B (0.28 +/- 0.06M(circle dot)). For the remaining targets (iota Dra, 18 Del, and HD 14067), we exclude companions more massive than 30-60 M-Jup at projected separations of 1 ''-7 ''. We examine whether these directly imaged companions or unidentified long-period companions can account for the RV trends observed around the six giants. We find that the Kozai mechanism can explain the high eccentricity of the inner planets iota Dra b, HD 5608 b, and HD 14067 b.

Subject headings and genre

NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
binaries: general
methods: observational
planetary systems
techniques: high angular resolution
techniques: radial velocities

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

Sato, Bun'ei (author)
Kuzuhara, Masayuki (author)
Narita, Norio (author)
Takahashi, Yasuhiro H. (author)
Uyama, Taichi (author)
Kudo, Tomoyuki (author)
Kusakabe, Nobuhiko (author)
Hashimoto, Jun (author)
Omiya, Masashi (author)
Harakawa, Hiroki (author)
Abe, Lyu (author)
Ando, Hiroyasu (author)
Brandner, Wolfgang (author)
Brandt, Timothy D. (author)
Carson, Joseph C. (author)
Currie, Thayne (author)
Egner, Sebastian (author)
Feldt, Markus (author)
Goto, Miwa (author)
Grady, Carol A. (author)
Guyon, Olivier (author)
Hayano, Yutaka (author)
Hayashi, Masahiko (author)
Hayashi, Saeko S. (author)
Helminiak, Krzysztof G. (author)
Henning, Thomas (author)
Hodapp, Klaus W. (author)
Ida, Shigeru (author)
Ishii, Miki (author)
Itoh, Yoichi (author)
Iye, Masanori (author)
Izumiura, Hideyuki (author)
Janson, MarkusStockholms universitet,Institutionen för astronomi(Swepub:su)mjanso (author)
Kambe, Eiji (author)
Kandori, Ryo (author)
Knapp, Gillian R. (author)
Kokubo, Eiichiro (author)
Kwon, Jungmi (author)
Matsuo, Taro (author)
Mayama, Satoshi (author)
McElwain, Michael W. (author)
Mede, Kyle (author)
Miyama, Shoken (author)
Morino, Jun-Ichi (author)
Moro-Martin, Amaya (author)
Nishimura, Tetsuo (author)
Pyo, Tae-Soo (author)
Serabyn, Eugene (author)
Suenaga, Takuya (author)
Suto, Hiroshi (author)
Suzuki, Ryuji (author)
Takami, Michihiro (author)
Takato, Naruhisa (author)
Takeda, Yoichi (author)
Terada, Hiroshi (author)
Thalmann, Christian (author)
Turner, Edwin L. (author)
Watanabe, Makoto (author)
Wisniewski, John (author)
Yamada, Toru (author)
Yoshida, Michitoshi (author)
Takami, Hideki (author)
Usuda, Tomonori (author)
Tamura, Motohide (author)
Stockholms universitetInstitutionen för astronomi (creator_code:org_t)

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In:Astrophysical Journal825:20004-637X1538-4357

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By the author/editor: Ryu, Tsuguru; Sato, Bun'ei; Kuzuhara, Masayu ...; Narita, Norio; Takahashi, Yasuh ...; Uyama, Taichi; show more...; Kudo, Tomoyuki; Kusakabe, Nobuhi ...; Hashimoto, Jun; Omiya, Masashi; Harakawa, Hiroki; Abe, Lyu; Ando, Hiroyasu; Brandner, Wolfga ...; Brandt, Timothy ...; Carson, Joseph C ...; Currie, Thayne; Egner, Sebastian; Feldt, Markus; Goto, Miwa; Grady, Carol A.; Guyon, Olivier; Hayano, Yutaka; Hayashi, Masahik ...; Hayashi, Saeko S ...; Helminiak, Krzys ...; Henning, Thomas; Hodapp, Klaus W.; Ida, Shigeru; Ishii, Miki; Itoh, Yoichi; Iye, Masanori; Izumiura, Hideyu ...; Janson, Markus; Kambe, Eiji; Kandori, Ryo; Knapp, Gillian R ...; Kokubo, Eiichiro; Kwon, Jungmi; Matsuo, Taro; Mayama, Satoshi; McElwain, Michae ...; Mede, Kyle; Miyama, Shoken; Morino, Jun-Ichi; Moro-Martin, Ama ...; Nishimura, Tetsu ...; Pyo, Tae-Soo; Serabyn, Eugene; Suenaga, Takuya; Suto, Hiroshi; Suzuki, Ryuji; Takami, Michihir ...; Takato, Naruhisa; Takeda, Yoichi; Terada, Hiroshi; Thalmann, Christ ...; Turner, Edwin L.; Watanabe, Makoto; Wisniewski, John; Yamada, Toru; Yoshida, Michito ...; Takami, Hideki; Usuda, Tomonori; Tamura, Motohide; show less...

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NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Astronomy Astrop ...

Articles in the publication: Astrophysical Jo ...

By the university: Stockholm University

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