Search Results - "Shinnaka, Yoshiharu"

Detection of 7Be ii in the Classical Nova V5669 Sgr (Nova Sagittarii 2015 No.3) by Arai, Akira, Tajitsu, Akito, Kawakita, Hideyo, Shinnaka, Yoshiharu

“…We report the new detection of 7Be ii in the ultraviolet spectra of V5669 Sgr during its early decline phase (+24 and +28 d). We identified three blueshifted…”
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Mid-infrared observations of the nucleus of Comet P/2016 BA14 (PANSTARRS) by Ootsubo, Takafumi, Kawakita, Hideyo, Shinnaka, Yoshiharu

“…We present mid-infrared observations of comet P/2016 BA14 (PANSTARRS), which were obtained on UT 2016 March 21.3 at heliocentric and geocentric distances of…”
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Direct Simulation Monte Carlo Modeling of Ammonia in Comet C/2014 Q2 (Lovejoy) by Kawakita, Hideyo, Dello Russo, Neil, Vervack, Ronald J., DiSanti, Michael A., Bonev, Boncho P., Kobayashi, Hitomi, Boice, Daniel C., Shinnaka, Yoshiharu

“…Abstract Ammonia (NH 3 ), likely the most abundant nitrogen-bearing molecule in cometary ices followed by hydrogen cyanide, is believed to be stored in the…”
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Post-perihelion volatile production and release from Jupiter-family comet 45P/Honda-Mrkos-Pajdušáková by Dello Russo, Neil, Kawakita, Hideyo, Bonev, Boncho P., Vervack, Ronald J., Gibb, Erika L., Shinnaka, Yoshiharu, Roth, Nathan X., DiSanti, Michael A., McKay, Adam J.

“…High-resolution infrared spectra of Jupiter-family comet 45P/Honda-Mrkos-Pajdušáková were obtained with NIRSPEC at the W. M. Keck Observatory on two…”
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(3200) Phaethon polarimetry in the negative branch: new evidence for the anhydrous nature of the DESTINY+ target asteroid by Geem, Jooyeon, Ishiguro, Masateru, Takahashi, Jun, Akitaya, Hiroshi, Kawabata, Koji S, Nakaoka, Tatsuya, Imazawa, Ryo, Mori, Fumiki, Jin, Sunho, Bach, Yoonsoo P, Jo, Hangbin, Kuroda, Daisuke, Hasegawa, Sunao, Yoshida, Fumi, Ishibashi, Ko, Sekiguchi, Tomohiko, Beniyama, Jin, Arai, Tomoko, Ikeda, Yuji, Shinnaka, Yoshiharu, Granvik, Mikael, Siltala, Lauri, Djupvik, Anlaug A, Kasikov, Anni, Pinter, Viktoria, Knudstrup, Emil

“…ABSTRACT We report on the first polarimetric study of (3200) Phaethon, the target of JAXA’s DESTINY+ mission, in the negative branch to ensure its anhydrous…”
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The Return of the Rosetta Target: Keck Near-infrared Observations of Comet 67P/Churyumov–Gerasimenko in 2021 by Bonev, Boncho P., Dello Russo, Neil, Kawakita, Hideyo, Vervack Jr, Ronald J., DiSanti, Michael A., Shinnaka, Yoshiharu, Ootsubo, Takafumi, Gibb, Erika L., Combi, Michael R., Altwegg, Kathrin, Biver, Nicolas, Crovisier, Jacques, Doppmann, Gregory, Villanueva, Geronimo L., Khan, Younas, Ejeta, Chemeda T., Saki, Mohammad, McKay, Adam J., Cochran, Anita L., Jehin, Emmanuel, Roth, Nathan X., Cordiner, Martin A., Shou, Yinsi

“…Abstract High-resolution near-infrared ground-based spectroscopic observations of comet 67P/Churyumov–Gerasimenko near its maximum activity in 2021 were…”
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Optical Imaging Polarimetry of Comet 21P/Giacobini–Zinner during Its 2018 Apparition by Shinnaka, Yoshiharu, Kawakita, Hideyo, Kobayashi, Hitomi, Furusho, Reiko, Watanabe, Jun-ichi

“…Abstract We conducted polarimetric observations of comet 21P/Giacobini–Zinner in the optical wavelength region using the polarimetric imager PICO equipped with…”
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The Very precise Echelle SpectroPolarimeter on the Araki telescope (VESPolA) by Arasaki, Takayuki, Ikeda, Yuji, Shinnaka, Yoshiharu, Itose, Chisato, Nakamichi, Akika, Kawakita, Hideyo

“…We report on the construction of a high-resolution spectropolarimeter, the Very precise Echelle SpectroPolarimeter on the Araki telescope (VESPolA). The…”
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Optical low-dispersion spectroscopic observations of Comet 103P/Hartley 2 at Koyama Astronomical Observatory during the EPOXI flyby by Shinnaka, Yoshiharu, Kawakita, Hideyo, Kobayashi, Hitomi, Naka, Chiharu, Arai, Akira, Arasaki, Takayuki, Kitao, Eiji, Taguchi, Gaku, Ikeda, Yuji

“…► We observed Comet 103P/Hartley 2 by the LOSA/F2 at KAO during the EPOXI flyby. ► We measured the mixing ratios of CN, C3, C2 and NH2 with respect to water. ►…”
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Revisit to the Nuclear Spin Temperature of NH $_{3}$ in Comet C/2001 Q4 (NEAT) Based on High-Dispersion Spectra of Cometary NH $_{2} by Shinnaka, Yoshiharu, Kawakita, Hideyo, Kobayashi, Hitomi, Kanda, Yu-ichi

“…The Ortho-to-Para abundance ratio (OPR) of cometary molecules is considered to be one of primordial characters of comeary ices, which has information…”
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Ortho-to-para abundance ratios of NH2in 26 comets: implications for the real meaning of OPRs by Shinnaka, Yoshiharu, Kawakita, Hideyo, Jehin, Emmanuel, Decock, Alice, Hutsemekers, Damien, Manfroid, Jean

“…Abundance ratios of nuclear-spin isomers for cometary molecules having identical protons, such as water and ammonia, have been measured and discussed from the…”
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ORTHO-TO-PARA ABUNDANCE RATIO OF WATER ION IN COMET C/2001 Q4 (NEAT): IMPLICATION FOR ORTHO-TO-PARA ABUNDANCE RATIO OF WATER by SHINNAKA, Yoshiharu, KAWAKITA, Hideyo, KOBAYASHI, Hitomi, BOICE, Daniel C, MARTINEZ, Susan E

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Detection of 7 Be ii in the Classical Nova V5669 Sgr (Nova Sagittarii 2015 No.3) by Arai, Akira, Tajitsu, Akito, Kawakita, Hideyo, Shinnaka, Yoshiharu

“…Abstract We report the new detection of 7 Be ii in the ultraviolet spectra of V5669 Sgr during its early decline phase (+24 and +28 d). We identified three…”
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Unidentified infrared emission features in mid-infrared spectrum of comet 21P/Giacobini-Zinner by Ootsubo, Takafumi, Kawakita, Hideyo, Shinnaka, Yoshiharu, Watanabe, Jun-ichi, Honda, Mitsuhiko

“…Comet 21P/Giacobini-Zinner (hereafter, comet 21P/G-Z) is a Jupiter-family comet and a parent comet of the October Draconids meteor shower. If meteoroids…”
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Ortho-to-para abundance ratios of NH 2 in 26 comets: implications for the real meaning of OPRs by Shinnaka, Yoshiharu, Kawakita, Hideyo, Jehin, Emmanuël, Decock, Alice, Hutsemékers, Damien, Manfroid, Jean

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Post-Perihelion Volatile Production and Release from Jupiter-Family Comet 45P/Honda-Mrkos-Pajdušáková by Russo, Neil Dello, Kawakita, Hideyo, Bonev, Boncho P., Vervack, Ronald J., Jr, Gibb, Erika L., Shinnaka, Yoshiharu, Roth, Nathan X., DiSanti, Michael A., McKay, Adam J.

“…High-resolution infrared spectra of Jupiter-family comet 45P/Honda-Mrkos-Pajdušáková were obtained with NIRSPEC at the W. M. Keck Observatory on two post-…”
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Nitrogen isotopic ratios of NH 2 in comets: implication for 15 N-fractionation in cometary ammonia by Shinnaka, Yoshiharu, Kawakita, Hideyo, Jehin, Emmanuël, Decock, Alice, Hutsemékers, Damien, Manfroid, Jean, Arai, Akira

“…The isotopic ratios are diagnostics for the physico-chemical conditions governing molecular formation. In comets, 14N/15N ratios have been measured from HCN in…”
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A kilometre-sized Kuiper belt object discovered by stellar occultation using amateur telescopes by Arimatsu, K., Tsumura, K., Usui, F., Shinnaka, Y., Ichikawa, K., Ootsubo, T., Kotani, T., Wada, T., Nagase, K., Watanabe, J.

“…Kuiper belt objects (KBOs) are thought to be remnants of the early Solar System, and their size distribution provides an opportunity to explore the formation…”
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ORTHO-TO-PARA ABUNDANCE RATIO OF WATER ION IN COMET C/2001 Q4 (NEAT): IMPLICATION FOR ORTHO-TO-PARA ABUNDANCE RATIO OF WATER by SHINNAKA, YOSHIHARU, Kawakita, Hideyo, Kobayashi, Hitomi, Boice, Daniel C, Martinez, Susan E

“…The ortho-to-para abundance ratio (OPR) of cometary molecules is considered to be one of the primordial characteristics of cometary ices, and contains…”
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ORTHO-TO-PARA ABUNDANCE RATIO (OPR) OF AMMONIA IN 15 COMETS: OPRs OF AMMONIA VERSUS 14 N/ 15 N RATIOS IN CN by Shinnaka, Yoshiharu, Kawakita, Hideyo, Kobayashi, Hitomi, Jehin, Emmanuël, Manfroid, Jean, Hutsemékers, Damien, Arpigny, Claude

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