A common proper motion stellar companion to HAT-P-7

Norio Narita, Yasuhiro H. Takahashi, Masayuki Kuzuhara, Teruyuki Hirano, Takuya Suenaga, Ryo Kandori, Tomoyuki Kudo, Bun'ei Sato, Ryuji Suzuki, Shigeru Ida, Makiko Nagasawa, Lyu Abe, Wolfgang Brandner, Timothy D. Brandt, Joseph Carson, Sebastian E. Egner, Markus Feldt, Miwa Goto, Carol A. Grady, Olivier GuyonJun Hashimoto, Yutaka Hayano, Masahiko Hayashi, Saeko S. Hayashi, Thomas Henning, Klaus W. Hodapp, Miki Ishii, Masanori Iye, Markus Janson, Gillian R. Knapp, Nobuhiko Kusakabe, Jungmi Kwon, Taro Matsuo, Satoshi Mayama, Michael W. Mcelwain, Shoken M. Miyama, Jun Ichi Morino, Amaya Moro-Martin, Tetsuo Nishimura, Tae Soo Pyo, Eugene Serabyn, Hiroshi Suto, Michihiro Takami, Naruhisa Takato, Hiroshi Terada, Christian Thalmann, Daigo Tomono, Edwin L. Turner, Makoto Watanabe, John P. Wisniewski, Toru Yamada, Hideki Takami, Tomonori Usuda, Motohide Tamura

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We report that HAT-P-7 has a common proper motion stellar companion. The companion is located at ̃3''009 to the east and estimated to be an M5.5V dwarf based on its colors. We also confirm the presence of a third companion, which was first reported byWinn et al. (2009, ApJ, 703, L99), based on long-term radial velocity measurements. We revisit the migration mechanism of HAT-P-7b given to the presence of those companions, and propose the sequential Kozai migration as a likely scenario in this system. This scenario may explain the reason for an outlier in the discussion of the spin-orbit alignment timescale for HAT-P-7b by Albrecht et al. (2012, ApJ, 757, 18).

Original languageEnglish (US)
Article numberL7
JournalPublications of the Astronomical Society of Japan
Volume64
Issue number6
StatePublished - Dec 25 2012
Externally publishedYes

Fingerprint

proper motion
outlier
velocity measurement
radial velocity
alignment
timescale
orbits
color

Keywords

  • Stars: binaries: general
  • Stars: planetary systems: individual (HAT-P-7)
  • Techniques: high angular resolution
  • Techniques: photometric
  • Techniques: radial velocities

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Narita, N., Takahashi, Y. H., Kuzuhara, M., Hirano, T., Suenaga, T., Kandori, R., ... Tamura, M. (2012). A common proper motion stellar companion to HAT-P-7. Publications of the Astronomical Society of Japan, 64(6), [L7].

A common proper motion stellar companion to HAT-P-7. / Narita, Norio; Takahashi, Yasuhiro H.; Kuzuhara, Masayuki; Hirano, Teruyuki; Suenaga, Takuya; Kandori, Ryo; Kudo, Tomoyuki; Sato, Bun'ei; Suzuki, Ryuji; Ida, Shigeru; Nagasawa, Makiko; Abe, Lyu; Brandner, Wolfgang; Brandt, Timothy D.; Carson, Joseph; Egner, Sebastian E.; Feldt, Markus; Goto, Miwa; Grady, Carol A.; Guyon, Olivier; Hashimoto, Jun; Hayano, Yutaka; Hayashi, Masahiko; Hayashi, Saeko S.; Henning, Thomas; Hodapp, Klaus W.; Ishii, Miki; Iye, Masanori; Janson, Markus; Knapp, Gillian R.; Kusakabe, Nobuhiko; Kwon, Jungmi; Matsuo, Taro; Mayama, Satoshi; Mcelwain, Michael W.; Miyama, Shoken M.; Morino, Jun Ichi; Moro-Martin, Amaya; Nishimura, Tetsuo; Pyo, Tae Soo; Serabyn, Eugene; Suto, Hiroshi; Takami, Michihiro; Takato, Naruhisa; Terada, Hiroshi; Thalmann, Christian; Tomono, Daigo; Turner, Edwin L.; Watanabe, Makoto; Wisniewski, John P.; Yamada, Toru; Takami, Hideki; Usuda, Tomonori; Tamura, Motohide.

In: Publications of the Astronomical Society of Japan, Vol. 64, No. 6, L7, 25.12.2012.

Research output: Contribution to journalArticle

Narita, N, Takahashi, YH, Kuzuhara, M, Hirano, T, Suenaga, T, Kandori, R, Kudo, T, Sato, B, Suzuki, R, Ida, S, Nagasawa, M, Abe, L, Brandner, W, Brandt, TD, Carson, J, Egner, SE, Feldt, M, Goto, M, Grady, CA, Guyon, O, Hashimoto, J, Hayano, Y, Hayashi, M, Hayashi, SS, Henning, T, Hodapp, KW, Ishii, M, Iye, M, Janson, M, Knapp, GR, Kusakabe, N, Kwon, J, Matsuo, T, Mayama, S, Mcelwain, MW, Miyama, SM, Morino, JI, Moro-Martin, A, Nishimura, T, Pyo, TS, Serabyn, E, Suto, H, Takami, M, Takato, N, Terada, H, Thalmann, C, Tomono, D, Turner, EL, Watanabe, M, Wisniewski, JP, Yamada, T, Takami, H, Usuda, T & Tamura, M 2012, 'A common proper motion stellar companion to HAT-P-7', Publications of the Astronomical Society of Japan, vol. 64, no. 6, L7.
Narita N, Takahashi YH, Kuzuhara M, Hirano T, Suenaga T, Kandori R et al. A common proper motion stellar companion to HAT-P-7. Publications of the Astronomical Society of Japan. 2012 Dec 25;64(6). L7.
Narita, Norio ; Takahashi, Yasuhiro H. ; Kuzuhara, Masayuki ; Hirano, Teruyuki ; Suenaga, Takuya ; Kandori, Ryo ; Kudo, Tomoyuki ; Sato, Bun'ei ; Suzuki, Ryuji ; Ida, Shigeru ; Nagasawa, Makiko ; Abe, Lyu ; Brandner, Wolfgang ; Brandt, Timothy D. ; Carson, Joseph ; Egner, Sebastian E. ; Feldt, Markus ; Goto, Miwa ; Grady, Carol A. ; Guyon, Olivier ; Hashimoto, Jun ; Hayano, Yutaka ; Hayashi, Masahiko ; Hayashi, Saeko S. ; Henning, Thomas ; Hodapp, Klaus W. ; Ishii, Miki ; Iye, Masanori ; Janson, Markus ; Knapp, Gillian R. ; Kusakabe, Nobuhiko ; Kwon, Jungmi ; Matsuo, Taro ; Mayama, Satoshi ; Mcelwain, Michael W. ; Miyama, Shoken M. ; Morino, Jun Ichi ; Moro-Martin, Amaya ; Nishimura, Tetsuo ; Pyo, Tae Soo ; Serabyn, Eugene ; Suto, Hiroshi ; Takami, Michihiro ; Takato, Naruhisa ; Terada, Hiroshi ; Thalmann, Christian ; Tomono, Daigo ; Turner, Edwin L. ; Watanabe, Makoto ; Wisniewski, John P. ; Yamada, Toru ; Takami, Hideki ; Usuda, Tomonori ; Tamura, Motohide. / A common proper motion stellar companion to HAT-P-7. In: Publications of the Astronomical Society of Japan. 2012 ; Vol. 64, No. 6.
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title = "A common proper motion stellar companion to HAT-P-7",
abstract = "We report that HAT-P-7 has a common proper motion stellar companion. The companion is located at ̃3''009 to the east and estimated to be an M5.5V dwarf based on its colors. We also confirm the presence of a third companion, which was first reported byWinn et al. (2009, ApJ, 703, L99), based on long-term radial velocity measurements. We revisit the migration mechanism of HAT-P-7b given to the presence of those companions, and propose the sequential Kozai migration as a likely scenario in this system. This scenario may explain the reason for an outlier in the discussion of the spin-orbit alignment timescale for HAT-P-7b by Albrecht et al. (2012, ApJ, 757, 18).",
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T1 - A common proper motion stellar companion to HAT-P-7

AU - Narita, Norio

AU - Takahashi, Yasuhiro H.

AU - Kuzuhara, Masayuki

AU - Hirano, Teruyuki

AU - Suenaga, Takuya

AU - Kandori, Ryo

AU - Kudo, Tomoyuki

AU - Sato, Bun'ei

AU - Suzuki, Ryuji

AU - Ida, Shigeru

AU - Nagasawa, Makiko

AU - Abe, Lyu

AU - Brandner, Wolfgang

AU - Brandt, Timothy D.

AU - Carson, Joseph

AU - Egner, Sebastian E.

AU - Feldt, Markus

AU - Goto, Miwa

AU - Grady, Carol A.

AU - Guyon, Olivier

AU - Hashimoto, Jun

AU - Hayano, Yutaka

AU - Hayashi, Masahiko

AU - Hayashi, Saeko S.

AU - Henning, Thomas

AU - Hodapp, Klaus W.

AU - Ishii, Miki

AU - Iye, Masanori

AU - Janson, Markus

AU - Knapp, Gillian R.

AU - Kusakabe, Nobuhiko

AU - Kwon, Jungmi

AU - Matsuo, Taro

AU - Mayama, Satoshi

AU - Mcelwain, Michael W.

AU - Miyama, Shoken M.

AU - Morino, Jun Ichi

AU - Moro-Martin, Amaya

AU - Nishimura, Tetsuo

AU - Pyo, Tae Soo

AU - Serabyn, Eugene

AU - Suto, Hiroshi

AU - Takami, Michihiro

AU - Takato, Naruhisa

AU - Terada, Hiroshi

AU - Thalmann, Christian

AU - Tomono, Daigo

AU - Turner, Edwin L.

AU - Watanabe, Makoto

AU - Wisniewski, John P.

AU - Yamada, Toru

AU - Takami, Hideki

AU - Usuda, Tomonori

AU - Tamura, Motohide

PY - 2012/12/25

Y1 - 2012/12/25

N2 - We report that HAT-P-7 has a common proper motion stellar companion. The companion is located at ̃3''009 to the east and estimated to be an M5.5V dwarf based on its colors. We also confirm the presence of a third companion, which was first reported byWinn et al. (2009, ApJ, 703, L99), based on long-term radial velocity measurements. We revisit the migration mechanism of HAT-P-7b given to the presence of those companions, and propose the sequential Kozai migration as a likely scenario in this system. This scenario may explain the reason for an outlier in the discussion of the spin-orbit alignment timescale for HAT-P-7b by Albrecht et al. (2012, ApJ, 757, 18).

AB - We report that HAT-P-7 has a common proper motion stellar companion. The companion is located at ̃3''009 to the east and estimated to be an M5.5V dwarf based on its colors. We also confirm the presence of a third companion, which was first reported byWinn et al. (2009, ApJ, 703, L99), based on long-term radial velocity measurements. We revisit the migration mechanism of HAT-P-7b given to the presence of those companions, and propose the sequential Kozai migration as a likely scenario in this system. This scenario may explain the reason for an outlier in the discussion of the spin-orbit alignment timescale for HAT-P-7b by Albrecht et al. (2012, ApJ, 757, 18).

KW - Stars: binaries: general

KW - Stars: planetary systems: individual (HAT-P-7)

KW - Techniques: high angular resolution

KW - Techniques: photometric

KW - Techniques: radial velocities

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JF - Publication of the Astronomical Society of Japan

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