TH
T. Hirano
astro-ph.EPastro-ph.SRastro-ph.GAastro-ph.IMastro-ph.HEphysics.atom-phbinary hostexoplanetsobliquityprimordial inclination
On Valency
published · living versionsW_u3hzbt3b·v1 · currentpublished
The K2-ESPRINT Project. I. Discovery of the Disintegrating Rocky Planet K2-22b with a Cometary Head and Leading Tail
with R. Sanchis-Ojeda, S. Rappaport, E. Pallé, L. Delrez +26
1 version
Preprints & journals
136 papers in the corpus · 2009–2026Near-infrared spectra of chemically peculiar stars and applications to kilonova spectra2609.30835v1 · Nanae Domoto, Masaomi Tanaka, Wako Aoki et al.2026 · 0 citationsarXiv
Beyond Five Scale Heights: Composition- and Cloud-dependent Ariel Tier-2 Requirements for sub-Neptunes2609.01577v1 · Vigneshwaran Krishnamurthy, Nicolas B. Cowan, Misato Fukagawa et al.2026 · 0 citationsarXiv
A Search for helium in the atmospheres of three sub-Neptunes and a super-Earth around M-dwarfs2608.19030v1 · Kiyoe Kawauchi, Norio Narita, Yuichi Ito et al.2026 · 0 citationsarXiv
Revealing {\alpha}-Element's Past with Subaru/IRD: Oxygen Abundance of 35 Very Metal-Poor Stars from Near-IR OH lines2606.18862v2 · Bakuh Danang Setyo Budi, Wako Aoki, Nicholas Storm et al.2026 · 0 citationsarXiv
The mass of TOI-1883 b: A low density super-Neptune in the ridge regime transiting an early-M dwarf2606.06868v1 · Izuru Fukuda, Norio Narita, Akihiko Fukui et al.2026 · 0 citationsarXiv
Discovery of a Low-Mass Companion to the Accelerating Star HIP 53005 with Strongly Conflicting Mass Estimates2604.03767v1 · Taichi Uyama, Thayne Currie, Jerry W. Xuan et al.2026 · 0 citationsarXiv
PyIRD: A Python-Based Data Reduction Pipeline for Subaru/IRD and REACH2601.12669v1 · Yui Kasagi, Hajime Kawahara, Ziying Gu et al.2026 · 0 citationsJournal of Open Source Software, 11(117), 9126 (2026)
Stellar Obliquities of Young Systems, Atmospheres Undergoing Contraction and Escape (SOYSAUCE): a likely aligned orbit for the 3 Myr planet TIDYE-1 b2511.14838v1 · Madyson G. Barber, Andrew W. Mann, Marshall C. Johnson et al.2025 · 3 citationsarXiv
Sibling Sub-Neptunes Around Sibling M Dwarfs: TOI-521 and TOI-9122509.14782v2 · G. Lacedelli, E. Pall'e, R. Luque et al.2025 · 0 citationsarXiv
Direct Imaging Explorations for Companions from the Subaru/IRD Strategic Program II; Discovery of a Brown-dwarf Companion around a Nearby mid-M~dwarf LSPM~J1446+46332509.13587v1 · Taichi Uyama, Masayuki Kuzuhara, Charles Beichman et al.2025 · 0 citationsarXiv
Unveiling the Atmosphere of HR 7672 B from the Near-Infrared High-Resolution Spectrum Using REACH/Subaru2508.01281v1 · Yui Kasagi, Yui Kawashima, Hajime Kawahara et al.2025 · 2 citationsarXiv
The mass of TOI-654 b: A short-period sub-Neptune transiting a mid-M dwarf2507.16222v1 · Kai Ikuta, Norio Narita, Takuya Takarada et al.2025 · 3 citationsarXiv
Multi-band, Multi-epoch Photometry of the Spot-crossing System TOI-3884: Refined System Geometry and Spot Properties2506.06445v2 · Mayuko Mori, Akihiko Fukui, Teruyuki Hirano et al.2025 · 7 citationsarXiv
Investigating the eccentricity distribution of transiting, long-period giant planets2504.05480v1 · Ahlam Alqasim, Teruyuki Hirano, Yasunori Hori et al.2025 · 5 citationsarXiv
Elemental abundances of 44 very metal-poor stars determined from Subaru/IRD near-infrared spectra2503.11487v1 · Wako Aoki, Timothy C. Beers, Satoshi Honda et al.2025 · 3 citationsarXiv
Revisiting Near-Infrared Features of Kilonovae: The Importance of Gadolinium2412.14597v1 · Salma Rahmouni, Masaomi Tanaka, Nanae Domoto et al.2024 · 5 citationsarXiv
An ultra-short-period super-Earth with an extremely high density and an outer companion.39516227 · Livingston, John H, Gandolfi, Davide, Trani, Alessandro A et al.2024 · 3 citationsScientific reports. 2024;14(1):27219
Weighing Single-lined Spectroscopic Binaries Using Tidal Effects on Radial Velocities: The Case of V723 Monocerotis2410.22083v1 · Mio Tomoyoshi, Kento Masuda, Teruyuki Hirano et al.2024 · 3 citationsarXiv
Atmospheric retrieval of Subaru/IRD high-resolution spectrum of the archetype T-type brown dwarf Gl 229 B2410.11561v2 · Yui Kawashima, Hajime Kawahara, Yui Kasagi et al.2024 · 3 citationsarXiv
JASMINE image simulator for high-precision astrometry and photometry2410.03149v1 · Takafumi Kamizuka, Hajime Kawahara, Ryou Ohsawa et al.2024 · 2 citationsProc. SPIE, 13099, 130992D (2024)
K2-399 b is not a planet. The Saturn that wandered through the Neptune desert is actually a hierarchical eclipsing binary2408.11732v1 · J. Lillo-Box, D. W. Latham, K. A. Collins et al.2024 · 3 citationsA&A 689, L8 (2024)
TOI-757 b: an eccentric transiting mini-Neptune on a 17.5-d orbit2407.20525v1 · A. Alqasim, N. Grieves, N. M. Ros'ario et al.2024 · 3 citationsarXiv
Stellar Models are Reliable at Low Metallicity: An Asteroseismic Age for the Ancient Very Metal-Poor Star KIC 81449072407.17566v1 · Daniel Huber, Ditte Slumstrup, Marc Hon et al.2024 · 17 citationsarXiv
Gliese 12 b: A temperate Earth-sized planet at 12 pc ideal for atmospheric transmission spectroscopy2405.14708v1 · M. Kuzuhara, A. Fukui, J. H. Livingston et al.2024 · 22 citationsPublished on 2024 May 23 by Astrophysical Journal Letters (ApJL) 967 L21
The Discovery and Follow-up of Four Transiting Short-period Sub-Neptunes Orbiting M dwarfs2405.12637v1 · Y. Hori, A. Fukui, T. Hirano et al.2024 · 5 citationsarXiv
Three short-period Earth-sized planets around M dwarfs discovered by TESS: TOI-5720b, TOI-6008b and TOI-6086b2405.06350v3 · K. Barkaoui, R.P. Schwarz, N. Narita et al.2024 · 0 citationsarXiv
Transit Spectroscopy of K2-33b with Subaru/IRD: Spin-Orbit Alignment and Tentative Atmospheric Helium2404.07262v1 · Teruyuki Hirano, Eric Gaidos, Hiroki Harakawa et al.2024 · 15 citationsarXiv
TOI-544 b: a potential water-world inside the radius valley in a two-planet system2310.14908v2 · H. L. M. Osborne, V. Van Eylen, E. Goffo et al.2023 · 21 citationsarXiv
Planetary companions orbiting the M dwarfs GJ 724 and GJ 3988. A CARMENES and IRD collaboration2310.05599v1 · P. Gorrini, J. Kemmer, S. Dreizler et al.2023 · 11 citationsA&A 680, A28 (2023)
The Orbit of Warm Jupiter WASP-106 b is aligned with its Star2308.07165v1 · Jan-Vincent Harre, Alexis M. S. Smith, Teruyuki Hirano et al.2023 · 8 citationsarXiv
An M dwarf accompanied by a close-in giant orbiter with SPECULOOS2308.02253v1 · Amaury H. M. J. Triaud, Georgina Dransfield, Taiki Kagetani et al.2023 · 26 citationsarXiv
Company for the ultra-high density, ultra-short period sub-Earth GJ 367 b: discovery of two additional low-mass planets at 11.5 and 34 days2307.09181v1 · Elisa Goffo, Davide Gandolfi, Jo Ann Egger et al.2023 · 35 citationsApJL 955 L3 (2023)
JASMINE: Near-Infrared Astrometry and Time Series Photometry Science2307.05666v2 · Daisuke Kawata, Hajime Kawahara, Naoteru Gouda et al.2023 · 25 citationsarXiv
Overfitting Affects the Reliability of Radial Velocity Mass Estimates of the V1298 Tau Planets2306.08145v2 · Sarah Blunt, Adolfo Carvalho, Trevor J. David et al.2023 · 53 citationsarXiv
Cerium features in kilonova near-infrared spectra: implication from a chemically peculiar star2306.04697v1 · Masaomi Tanaka, Nanae Domoto, Wako Aoki et al.2023 · 14 citationsarXiv
TOI-1130: A photodynamical analysis of a hot Jupiter in resonance with an inner low-mass planet2305.15565v1 · J. Korth, D. Gandolfi, J. Subjak et al.2023 · 34 citationsA&A 675, A115 (2023)
A spectroscopic thermometer: individual vibrational band spectroscopy with the example of OH in the atmosphere of WASP-33b2305.11071v1 · Sam O.M. Wright, Stevanus K. Nugroho, Matteo Brogi et al.2023 · 16 citationsarXiv
The mass determination of TOI-519 b: a close-in giant planet transiting a metal-rich mid-M dwarf2304.14703v2 · Taiki Kagetani, Norio Narita, Tadahiro Kimura et al.2023 · 25 citationsarXiv
Direct Imaging Explorations for Companions around Mid-Late M Stars from the Subaru/IRD Strategic Program2302.13354v1 · Taichi Uyama, Charles Beichman, Masayuki Kuzuhara et al.2023 · 4 citationsarXiv
Absence of extended atmospheres in low-mass star radius-gap planets GJ 9827 b, GJ 9827 d and TOI-1235 b2302.01479v2 · Vigneshwaran Krishnamurthy, Teruyuki Hirano, Eric Gaidos et al.2023 · 13 citationsarXiv
The low density, hot Jupiter TOI-640 b is on a polar orbit2302.01702v1 · Emil Knudstrup, Simon H. Albrecht, Davide Gandolfi et al.2023 · 4 citationsA&A 671, A164 (2023)
An Earth-sized Planet around an M5 Dwarf Star at 22 pc2302.00699v1 · Teruyuki Hirano, Fei Dai, John H. Livingston et al.2023 · 9 citationsarXiv
High-Resolution Transmission Spectroscopy of the Terrestrial Exoplanet GJ 486b2212.11816v2 · Andrew Ridden-Harper, Stevanus Nugroho, Laura Flagg et al.2022 · 27 citationsarXiv
Radial velocity confirmation of a hot super-Neptune discovered by TESS with a warm Saturn-mass companion2211.17035v1 · E. Knudstrup, D. Gandolfi, G. Nowak et al.2022 · 9 citationsarXiv
Planet(esimal)s Around Stars with TESS (PAST) III: A Search for Triplet He I in the Atmospheres of Two 200 Myr-old Planets2211.02887v1 · Eric Gaidos, Teruyuki Hirano, Rena A. Lee et al.2022 · 22 citationsarXiv
Two temperate super-Earths transiting a nearby late-type M dwarf2209.02831v1 · L. Delrez, C. A. Murray, F. J. Pozuelos et al.2022 · 64 citationsarXiv
Precise mass determination for the keystone sub-Neptune planet transiting the mid-type M dwarf G 9-402208.07287v1 · R. Luque, G. Nowak, T. Hirano et al.2022 · 18 citationsA&A 666, A154 (2022)
TOI-1452 b: SPIRou and TESS reveal a super-Earth in a temperate orbit transiting an M4 dwarf2208.06333v1 · Charles Cadieux, Ren'e Doyon, Mykhaylo Plotnykov et al.2022 · 55 citationsAJ, 164, 96 (2022)
TOI-1696: a nearby M4 dwarf with a planet in the Neptunian desert2203.02694v1 · Mayuko Mori, John H. Livingston, Jerome de Leon et al.2022 · 18 citationsarXiv
Validation and atmospheric exploration of the sub-Neptune TOI-2136b around a nearby M3 dwarf2202.10182v2 · K. Kawauchi, F. Murgas, E. Palle et al.2022 · 14 citationsA&A 666, A4 (2022)
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