Studies of Expolanets and Solar Systems with SPICA (2009)
Takami, Michihiro, Tamura, Motohide, Enya, Keigo, Ootsubo, Takafumi, Fukagawa, Misato, Honda, Mitsuhiko, ...
The SPace Infrared telescope for Cosmology and Astrophysics (SPICA) is a proposed mid-to-far infrared (4-200 um) astronomy mission, scheduled for launch in 2017. A single, 3.5m aperture telescope...
Variation of Inner Radius of Dust Torus in NGC4151 (2009)
Koshida, Shintaro, Yoshii, Yuzuru, Kobayashi, Yukiyasu, Minezaki, Takeo, Sakata, Yu, Sugawara, Shota, ...
The long-term optical and near infrared monitoring observations for a type 1 act ive galactic nucleus NGC 4151 were carried out for six years from 2001 to 2006 b y using the MAGNUM telescope, and...
SPICA infrared coronagraph for the direct observation of exo-planets (2009)
We present a mid-infrared coronagraph to target the direct observation of extrasolar planets, for Space Infrared telescope for Cosmology and Astrophysics (SPICA). We have commenced studies for a...
Hot debris dust around HD 106797 (2009)
Fujiwara, Hideaki, Yamashita, Takuya, Ishihara, Daisuke, Onaka, Takashi, Kataza, Hirokazu, Ootsubo, Takafumi, ...
Photometry of the A0 V main-sequence star HD 106797 with AKARI and Gemini/T-ReCS is used to detect excess emission over the expected stellar photospheric emission between 10 and 20 micron, which is...
Measurement of the Spin-Orbit Angle of Exoplanet HAT-P-1b (2008)
Johnson, John A., Winn, Joshua N., Narita, Norio, Enya, Keigo, Williams, Peter K. G., Marcy, Geoffrey W., ...
We present new spectroscopic and photometric observations of the HAT-P-1 planetary system. Spectra obtained during three transits exhibit the Rossiter-McLaughlin effect, allowing us to measure the...
The SPICA Consortium, Swinyard, Bruce, Nakagawa, Takao, Merken, Patrick, Royer, Pierre, Souverijns, Tim, ...
Coronagraph Workshop papers (2007)
Traub, Wesley A., Abe, Lyu, Angel, Roger, Arenberg, Jon, Balasubramanian, Bala, Baudoz, Pierre, ...
This volume contains the written contributions corresponding to the oral presentations of about 45 authors at the Coronagraph Workshop 2006.
Flight Performance of the AKARI Cryogenic System (2007)
Nakagawa, Takao, Enya, Keigo, Hirabayashi, Masayuki, Kaneda, Hidehiro, Kii, Tsuneo, Kimura, Yoshiyuki, ...
We describe the flight performance of the cryogenic system of the infrared astronomical satellite AKARI, which was successfully launched on 2006 February 21 (UT). AKARI carries a 68.5 cm telescope...
Microscopic surface structure of C/SiC composite mirrors for space cryogenic telescopes (2007)
Enya, Keigo, Nakagawa, Takao, Kaneda, Hidehiro, Onaka, Takashi, Ozaki, Tuyoshi, Kume, Masami
We report on the microscopic surface structure of carbon-fiber-reinforced silicon carbide (C/SiC) composite mirrors that have been improved for the Space Infrared Telescope for Cosmology and...
Spin-Orbit Alignment for the Eccentric Exoplanet HD 147506b (2007)
Winn, Joshua N., Johnson, John Asher, Peek, Kathryn M. G., Marcy, Geoffrey W., Bakos, Gaspar A., Enya, Keigo, ...
The short-period exoplanet HD 147506b (also known as HAT-P-2b) has an eccentric orbit, raising the possibility that it migrated through planet-planet scattering or Kozai oscillations accompanied by...
Measurement of the Rossiter--McLaughlin Effect in the Transiting Exoplanetary System TrES-1 (2007)
Narita, Norio, Enya, Keigo, Sato, Bun'ei, Ohta, Yasuhiro, Winn, Joshua N., Suto, Yasushi, ...
We report a measurement of the Rossiter--McLaughlin effect in the transiting extrasolar planetary system TrES-1, via simultaneous spectroscopic and photometric observations with the Subaru and MAGNUM...
The infrared astronomical mission AKARI (2007)
Murakami, Hiroshi, Baba, Hajime, Barthel, Peter D., Clements, David L., Cohen, Martin, Doi, Yasuo, ...
Winn, Joshua N., Holman, Matthew J., Henry, Gregory W., Roussanova, Anna, Enya, Keigo, Yoshii, Yuzuru, ...
We present photometry of HD 189733 during eight transits of its close-in giant planet, and out-of-transit photometry spanning two years. Using the transit photometry, we determine the stellar and...
Tomita, Hiroyuki, Yoshii, Yuzuru, Kobayashi, Yukiyasu, Minezaki, Takeo, Enya, Keigo, Suganuma, Masahiro, ...
We propose a new method of analysing a variable component for type 1 active galactic nuclei (AGNs) in the near-infrared wavelength region. This analysis uses a multiple regression technique and...
Measurement of the Spin-Orbit Alignment in the Exoplanetary System HD 189733 (2006)
Winn, Joshua N., Johnson, John A., Marcy, Geoffrey W., Butler, R. Paul, Vogt, Steven S., Henry, Gregory W., ...
We present spectroscopy of a transit of the exoplanet HD 189733b. By modeling the Rossiter-McLaughlin effect (the anomalous Doppler shift due to the partial eclipse of the rotating stellar surface),...
The Optical/Near-Infrared Light Curves of SN 2002ap for the First 1.5 Years after Discovery (2006)
Tomita, Hiroyuki, Deng, Jinsong, Maeda, Keiichi, Yoshii, Yuzuru, Nomoto, Ken'ichi, Mazzali, Paolo A., ...
Late-time BVRIJHK photometry of the peculiar Type Ic SN 2002ap, taken between 2002 June 12 and 2003 August 29 with the MAGNUM telescope, is presented. The light curve decline rate is derived in each...
The optical/near-infrared light curves of SN 2002ap for the first 1.5 years after discovery (2006)
Tomita, Hiroyuki, Deng, Jinsong, Maeda, Keiichi, Yoshii, Yuzuru, Nomoto, Ken'ichi, Mazzali, Paolo A., ...
Joshua N. Winn, Matthew J. Holman, Gregory W. Henry, Anna Roussanova, Keigo Enya, Yuzuru Yoshii, ...
We present photometry of HD 189733 during eight transits of its close-in giant planet, and out-of-transit photometry spanning 2 yr. Using the transit photometry, we determine the stellar and...
Joshua N. Winn, John Asher Johnson, Geoffrey W. Marcy, R. Paul Butler, Steven S. Vogt, Gregory W. Henry, ...
We present spectroscopy of a transit of the exoplanet HD 189733b. By modeling the Rossiter-McLaughlin effect (the anomalous Doppler shift due to the partial eclipse of the rotating stellar surface),...
JHK' Imaging Photometry of Seyfert 1 AGNs and Quasars I: Multi-Aperture Photometry (2002)
Enya, Keigo, Yoshii, Yuzuru, Kobayashi, Yukiyasu, Minezaki, Takeo, Tomita, Hiroyuki, Peterson, Bruce A.
Near-infrared $JHK'$ imaging photometry was obtained of 331 AGNs consisting mainly of Seyfert 1 AGNs and quasars (QSOs). This sample was selected to cover a range of radio emission strength, redshift...
Enya, Keigo, Yoshii, Yuzuru, Kobayashi, Yukiyasu, Minezaki, Takeo, Tomita, Hiroyuki, Peterson, Bruce A.
Observations of 226 AGNs in the near-infrared $J$, $H$, and $K'$ bands are presented along with the analysis of the observations for variability. Our sample consists mainly of Seyfert 1 AGNs and...
Enya, Keigo, Yoshii, Yuzuru, Kobayashi, Yukiyasu, Minezaki, Takeo, Tomita, Hiroyuki, Peterson, Bruce A.
Variability of 226 AGNs in the near-infrared $J$, $H$, and $K'$ bands is analyzed and discussed. An ensemble average for measured variabilities was obtained for various samples of the AGNs divided by...