Search Results - "Nakagawa, Hiromu"

Stability of Atmospheric Redox States of Early Mars Inferred from Time Response of the Regulation of H and O Losses by Koyama, Shungo, Terada, Naoki, Nakagawa, Hiromu, Kuroda, Takeshi, Sekine, Yasuhito

“…Abstract The ratio of total losses of H and O from the atmosphere is crucial for determining the Martian atmospheric redox state. The H and O escapes are shown…”
Get full text

Can we constrain the origin of Mars' recurring slope lineae using atmospheric observations? by Kurokawa, Hiroyuki, Kuroda, Takeshi, Aoki, Shohei, Nakagawa, Hiromu

“…Flowing water and brine have been proposed to cause seasonally reappearing dark streaks called recurring slope lineae (RSL) on steep warm slopes on Mars, along…”
Get full text

Modeling of Diffuse Auroral Emission at Mars: Contribution of MeV Protons by Nakamura, Yuki, Terada, Naoki, Leblanc, François, Rahmati, Ali, Nakagawa, Hiromu, Sakai, Shotaro, Hiruba, Sayano, Kataoka, Ryuho, Murase, Kiyoka

“…The Solar Energetic Particle and imaging ultraviolet spectrograph (IUVS) instruments onboard the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft…”
Get full text

Martian moons exploration MMX: sample return mission to Phobos elucidating formation processes of habitable planets by Kuramoto, Kiyoshi, Kawakatsu, Yasuhiro, Fujimoto, Masaki, Araya, Akito, Barucci, Maria Antonietta, Genda, Hidenori, Hirata, Naru, Ikeda, Hitoshi, Imamura, Takeshi, Helbert, Jörn, Kameda, Shingo, Kobayashi, Masanori, Kusano, Hiroki, Lawrence, David J., Matsumoto, Koji, Michel, Patrick, Miyamoto, Hideaki, Morota, Tomokatsu, Nakagawa, Hiromu, Nakamura, Tomoki, Ogawa, Kazunori, Otake, Hisashi, Ozaki, Masanobu, Russell, Sara, Sasaki, Sho, Sawada, Hirotaka, Senshu, Hiroki, Tachibana, Shogo, Terada, Naoki, Ulamec, Stephan, Usui, Tomohiro, Wada, Koji, Watanabe, Sei-ichiro, Yokota, Shoichiro

“…Martian moons exploration, MMX, is the new sample return mission planned by the Japan Aerospace Exploration Agency (JAXA) targeting the two Martian moons with…”
Get full text

Mars’ atmospheric neon suggests volatile-rich primitive mantle by Kurokawa, Hiroyuki, Miura, Yayoi N., Sugita, Seiji, Cho, Yuichiro, Leblanc, François, Terada, Naoki, Nakagawa, Hiromu

“…Martian atmospheric neon (Ne) has been detected by Viking and also found as trapped gas in Martian meteorites, though its abundance and isotopic composition…”
Get full text

In situ observations of ions and magnetic field around Phobos: the mass spectrum analyzer (MSA) for the Martian Moons eXploration (MMX) mission by Yokota, Shoichiro, Terada, Naoki, Matsuoka, Ayako, Murata, Naofumi, Saito, Yoshifumi, Delcourt, Dominique, Futaana, Yoshifumi, Seki, Kanako, Schaible, Micah J., Asamura, Kazushi, Kasahara, Satoshi, Nakagawa, Hiromu, Nishino, Masaki N., Nomura, Reiko, Keika, Kunihiro, Harada, Yuki, Imajo, Shun

“…The mass spectrum analyzer (MSA) will perform in situ observations of ions and magnetic fields around Phobos as part of the Martian Moons eXploration (MMX)…”
Get full text

Global Distribution and Parameter Dependences of Gravity Wave Activity in the Martian Upper Thermosphere Derived from MAVEN NGIMS Observations by Terada, Naoki, Leblanc, Francois, Nakagawa, Hiromu, Medvedev, Alexander S., Yigit, Erdal, Kuroda, Takeshi, Hara, Takuya, England, Scott L., Fujiwara, Hitoshi, Terada, Kaori, Seki, Kanako, Mahaffy, Paul R., Elrod, Meredith, Benna, Mehdi, Grebowsky, Joseph, Jakosky, Bruce M.

“…Wavelike perturbations in the Martian upper thermosphere observed by the Neutral Gas Ion Mass Spectrometer (NGIMS) onboard the Mars Atmosphere and Volatile…”
Get full text

Alternate oscillations of Martian hydrogen and oxygen upper atmospheres during a major dust storm by Masunaga, Kei, Terada, Naoki, Yoshida, Nao, Nakamura, Yuki, Kuroda, Takeshi, Yoshioka, Kazuo, Suzuki, Yudai, Nakagawa, Hiromu, Kimura, Tomoki, Tsuchiya, Fuminori, Murakami, Go, Yamazaki, Atsushi, Usui, Tomohiro, Yoshikawa, Ichiro

“…Dust storms on Mars play a role in transporting water from its lower to upper atmosphere, seasonally enhancing hydrogen escape. However, it remains unclear how…”
Get full text

The Mars system revealed by the Martian Moons eXploration mission by Ogohara, Kazunori, Nakagawa, Hiromu, Aoki, Shohei, Kouyama, Toru, Usui, Tomohiro, Terada, Naoki, Imamura, Takeshi, Montmessin, Franck, Brain, David, Doressoundiram, Alain, Gautier, Thomas, Hara, Takuya, Harada, Yuki, Ikeda, Hitoshi, Koike, Mizuho, Leblanc, François, Ramirez, Ramses, Sawyer, Eric, Seki, Kanako, Spiga, Aymeric, Vandaele, Ann Carine, Yokota, Shoichiro, Barucci, Antonella, Kameda, Shingo

“…Japan Aerospace Exploration Agency (JAXA) plans a Phobos sample return mission (MMX: Martian Moons eXploration). In this study, we review the related works on…”
Get full text

Seasonal variation of the HDO/H2O ratio in the atmosphere of Mars at the middle of northern spring and beginning of northern summer by Aoki, Shohei, Nakagawa, Hiromu, Sagawa, Hideo, Giuranna, Marco, Sindoni, Giuseppe, Aronica, Alessandro, Kasaba, Yasumasa

“…We present the seasonal variation of the HDO/H2O ratio caused by sublimation-condensation processes in a global view of the martian water cycle. The HDO/H2O…”
Get full text

Variations in Vertical CO/CO2 Profiles in the Martian Mesosphere and Lower Thermosphere Measured by the ExoMars TGO/NOMAD: Implications of Variations in Eddy Diffusion Coefficient by Yoshida, Nao, Nakagawa, Hiromu, Aoki, Shohei, Erwin, Justin, Vandaele, Ann Carine, Daerden, Frank, Thomas, Ian, Trompet, Loïc, Koyama, Shungo, Terada, Naoki, Neary, Lori, Murata, Isao, Villanueva, Geronimo, Liuzzi, Giuliano, Lopez‐Valverde, Miguel Angel, Brines, Adrian, Modak, Ashimananda, Kasaba, Yasumasa, Ristic, Bojan, Bellucci, Giancarlo, López‐Moreno, José Juan, Patel, Manish

“…Using the Nadir and Occultation for MArs Discovery instrument aboard Trace Gas Orbiter, we derived the CO/CO2 profiles between 75 and 105 km altitude with the…”
Get full text

Discrete aurora and the nightside ionosphere of Mars: an EMM–MEX conjunction of FUV imaging, ionospheric radar sounding, and suprathermal electron measurements by Harada, Yuki, Fujiwara, Yuka, Lillis, Robert J., Deighan, Justin, Nakagawa, Hiromu, Sánchez-Cano, Beatriz, Lester, Mark, Futaana, Yoshifumi, Holmström, Mats, Frahm, Rudy A.

“…Since 2021, a new surge in discrete aurora detections at Mars has been observed by the Emirates Mars Ultraviolet Spectrometer (EMUS) onboard the Emirates Mars…”
Get full text

Intense Zonal Wind in the Martian Mesosphere During the 2018 Planet‐Encircling Dust Event Observed by Ground‐Based Infrared Heterodyne Spectroscopy by Miyamoto, Akiho, Nakagawa, Hiromu, Kuroda, Takeshi, Takami, Kosuke, Murata, Isao, Medvedev, Alexander S., Yoshida, Nao, Aoki, Shohei, Sagawa, Hideo, Kasaba, Yasumasa, Terada, Naoki

“…We report on the direct measurements of zonal winds around 80 km altitude during the 2018 planet‐encircling dust event (PEDE) by infrared (IR) heterodyne…”
Get full text

Lunar Radar Sounder Observations of Subsurface Layers Under the Nearside Maria of the Moon by Ono, Takayuki, Kumamoto, Atsushi, Nakagawa, Hiromu, Yamaguchi, Yasushi, Oshigami, Shoko, Yamaji, Atsushi, Kobayashi, Takao, Kasahara, Yoshiya, Oya, Hiroshi

“…Observations of the subsurface geology of the Moon help advance our understanding of lunar origin and evolution. Radar sounding from the Kaguya spacecraft has…”
Get full text

Science operation plan of Phobos and Deimos from the MMX spacecraft by Nakamura, Tomoki, Ikeda, Hitoshi, Kouyama, Toru, Nakagawa, Hiromu, Kusano, Hiroki, Senshu, Hiroki, Kameda, Shingo, Matsumoto, Koji, Gonzalez-Franquesa, Ferran, Ozaki, Naoya, Takeo, Yosuke, Baresi, Nicola, Oki, Yusuke, Lawrence, David J., Chabot, Nancy L., Peplowski, Patrick N., Barucci, Maria Antonietta, Sawyer, Eric, Yokota, Shoichiro, Terada, Naoki, Ulamec, Stephan, Michel, Patrick, Kobayashi, Masanori, Sasaki, Sho, Hirata, Naru, Wada, Koji, Miyamoto, Hideaki, Imamura, Takeshi, Ogawa, Naoko, Ogawa, Kazunori, Iwata, Takahiro, Imada, Takane, Otake, Hisashi, Canalias, Elisabet, Lorda, Laurence, Tardivel, Simon, Mary, Stéphane, Kunugi, Makoto, Mitsuhashi, Seiji, Doressoundiram, Alain, Merlin, Frédéric, Fornasier, Sonia, Reess, Jean-Michel, Bernardi, Pernelle, Imai, Shigeru, Ito, Yasuyuki, Ishida, Hatsumi, Kuramoto, Kiyoshi, Kawakatsu, Yasuhiro

“…The science operations of the spacecraft and remote sensing instruments for the Martian Moon eXploration (MMX) mission are discussed by the mission operation…”
Get full text

A Warm Layer in the Nightside Mesosphere of Mars by Nakagawa, Hiromu, Jain, Sonal K., Schneider, Nicholas M., Montmessin, Franck, Yelle, Roger V., Jiang, Fayu, Verdier, Loic, Kuroda, Takeshi, Yoshida, Nao, Fujiwara, Hitoshi, Imamura, Takeshi, Terada, Naoki, Terada, Kaori, Seki, Kanako, Gröller, Hannes, Deighan, Justin I.

“…We report a new set of stellar occultation measurements for nightside temperature profiles made by the Mars Atmosphere and Volatile EvolutioN/Imaging…”
Get full text

Evaluation of a Method to Retrieve Temperature and Wind Velocity Profiles of the Venusian Nightside Mesosphere from Mid-Infrared CO2 Absorption Line Observed by Heterodyne Spectroscopy by Nakagawa, Hiromu, Sagawa, Hideo, Krause, Pia, Murata, Isao, Kasaba, Yasumasa, Kuroda, Takeshi, Aoki, Shohei, Kouyama, Toru, Kostiuk, Theodor, Livengood, Timothy A, Gilli, Gabriella

“…We evaluated a method for retrieving vertical temperature and Doppler wind velocity profiles of the Venusian nightside mesosphere from the CO2 absorption line…”
Get full text

Comparison of the Martian thermospheric density and temperature from IUVS/MAVEN data and general circulation modeling by Medvedev, Alexander S., Nakagawa, Hiromu, Mockel, Chris, Yiğit, Erdal, Kuroda, Takeshi, Hartogh, Paul, Terada, Kaori, Terada, Naoki, Seki, Kanako, Schneider, Nicholas M., Jain, Sonal K., Evans, J. Scott, Deighan, Justin I., McClintock, William E., Lo, Daniel, Jakosky, Bruce M.

“…Newly released Imaging Ultraviolet Spectrograph/Mars Atmosphere and Volatile EvolutioN (IUVS/MAVEN) measurements of CO2 density in the Martian thermosphere…”
Get full text

Seasonal and Dust‐Related Variations in the Dayside Thermospheric and Ionospheric Compositions of Mars Observed by MAVEN/NGIMS by Yoshida, Nao, Terada, Naoki, Nakagawa, Hiromu, Brain, David A., Sakai, Shotaro, Nakamura, Yuki, Benna, Mehdi, Masunaga, Kei

“…We report seasonal and dust‐related variations in neutral and ion species (CO2, O, and N2, and CO2+, O2+, O+, and N+, respectively) in the dayside Martian…”
Get full text

Strong Depletion of 13C in CO Induced by Photolysis of CO2 in the Martian Atmosphere, Calculated by a Photochemical Model by Yoshida, Tatsuya, Aoki, Shohei, Ueno, Yuichiro, Terada, Naoki, Nakamura, Yuki, Shiobara, Kimie, Yoshida, Nao, Nakagawa, Hiromu, Sakai, Shotaro, Koyama, Shungo

“…The isotopic signature of atmospheric carbon offers a unique tracer for the history of the Martian atmosphere and the origin of organic matter on Mars. The…”
Get full text