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19932026
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207 papers · 1 filter

astro-ph.EP2026

A Search for helium in the atmospheres of three sub-Neptunes and a super-Earth around M-dwarfs

Kiyoe Kawauchi, Norio Narita, Yuichi Ito +26

Thousands of sub-Neptunes have been discovered mainly through space-based surveys such as Kepler and TESS. Their bulk compositions and internal structures are thought to reflect th…

astro-ph.EP2026★ 1 cited

Thermal emission spectra of the ultra-hot Jupiter WASP-33 b

Qianyi Zou, Meng Zhai, Wei Wang +12

Observations of exoplanetary atmospheres provide critical insights into their chemical composition, formation and evolution history. Ultra-hot Jupiters serve as excellent targets f…

astro-ph.EP2026★ 1 cited

Constraining the size, shape, and albedo of the large Trans-Neptunian Object (28978) Ixion with multi-chord stellar occultations

Y. Kilic, F. Braga-Ribas, C. L. Pereira +81

Trans-Neptunian objects (TNOs) are among the most primitive remnants of the early Solar System, and constraining their sizes, shapes, albedos, and surface properties is essential f…

astro-ph.EP2025★ 6 cited

A free-floating-planet microlensing event caused by a Saturn-mass object

Subo Dong, Zexuan Wu, Yoon-Hyun Ryu +39

A population of free-floating planets is known from gravitational microlensing surveys. None have a directly measured mass, owing to a degeneracy with the distance, but the populat…

astro-ph.EP2025★ 1 cited

Dynamical evolution of massless particles in star clusters with NBODY6++GPU-MASSLESS: II. The long-term evolution of free-floating comets

Francesco Flammini Dotti, M. B. N. Kouwenhoven, Kai Wu +5

Context. Comets, asteroids, planetesimals, free-floating planets and brown dwarfs, are continuously injected into the intra-cluster environment after expulsion from their host plan…

astro-ph.EP2025★ 1 cited

A High-Precision Dynamical Model of Callisto: Incorporating Rotation Effects within Multi-Layer Internal Structure Models

Kai Huang, Yongzhang Yang, Yuhao Chen +2

China is planing to launch the Tianwen-4 mission around the year 2030, with its aim being the exploration of Jupiter and its moon, Callisto. Within the realm of deep space explorat…

astro-ph.EP2025★ 5 cited

Planet Across Space and Time (PAST). VII. The origin and tidal evolution of hot Jupiters constrained by a broken age-frequency relation

Di-Chang Chen, Ji-Wei Xie, Ji-Lin Zhou +4

The discovery of hot Jupiters has challenged the classical planet formation theory. Although various formation mechanisms have been proposed, the dominant channel and relative cont…

astro-ph.EP2025

A high geometric albedo and small size of the Haumea cluster member (24835) 1995 SM55 from a stellar occultation and photometric observations

J. L. Ortiz, N. Morales, B. Sicardy +98

Trans-Neptunian objects (TNOs) are among the most ancient bodies of the solar system. Understanding their physical properties is key to constraining their origin and the evolution…

astro-ph.EP2025

Sibling Sub-Neptunes Around Sibling M Dwarfs: TOI-521 and TOI-912

G. Lacedelli, E. Pallé, R. Luque +47

Sub-Neptunes are absent in the Solar System, yet they are commonly found in our Galaxy. They challenge the internal structure models and prompt investigation on their formation, ev…

astro-ph.EP2025★ 5 cited

Pre-perihelion radio observations of comet 12P/Pons-Brooks with Tianma radio telescope

Juncen Li, Xian Shi, Jianchun Shi +7

{The multiple outburst events of comet 12P/Pons-Brooks during its 2024 apparition offer a unique window into highly-active volatile releasing processes not observable during quiesc…

astro-ph.EP2025★ 2 cited

Optical and Near-Infrared Spectroscopy of the Outbursting Comet 12P/Pons-Brooks

Ruining Zhao, Bin Yang, Michael S. P. Kelley +4

We present optical and near-infrared (NIR) observations of the outbursting, Halley-type comet 12P/Pons-Brooks. Three NIR spectra were obtained during two outbursts in October and N…

astro-ph.EP2025★ 2 cited

HST/WFC3 Constraints on the Abundances of OH and FeH in the Atmosphere of the Ultra-Hot Neptune LTT-9779 b

Li Zhou, Xinyue Ma, Bo Ma +11

Planets residing within the hot-Neptune Desert are rare, and studying their atmospheres can provide valuable insights into their formation and evolutionary processes. We present th…

astro-ph.EP2025★ 7 cited

Systematic KMTNet Planetary Anomaly Search. XII. Complete Sample of 2017 Subprime Field Planets

Yuqian Gui, Weicheng Zang, Ruocheng Zhai +39

We report the analysis of four unambiguous planets and one possible planet from the subprime fields () of the 2017 Korea Microlensing Telescope Network (KMTN…

astro-ph.EP2025★ 1 cited

Modeling Atmospheric Ion Escape from Kepler-1649 b and c over Time

Haitao Li, Chuanfei Dong, Lianghai Xie +15

Rocky planets orbiting M-dwarf stars are prime targets for atmospheric characterization, yet their long-term evolution under intense stellar winds and high-energy radiation remains…

astro-ph.EP2025★ 4 cited

Asteroid shape inversion with light curves using deep learning

YiJun Tang, ChenChen Ying, ChengZhe Xia +2

Asteroid shape inversion using photometric data has been a key area of study in planetary science and astronomical research.However, the current methods for asteroid shape inversio…

astro-ph.EP2025★ 1 cited

Detecting Exomoons in Free-Floating-Planet Events from Space-based Microlensing Surveys

Haozhu Fu, Subo Dong

When a planet is ejected from its star-planet system due to dynamical interactions, its satellite may remain gravitationally bound to the planet. The Chinese Space Station Telescop…

astro-ph.EP2024★ 3 cited

FAST Observations of Four Comets to Search for the Molecular Line Emissions between 1.0 and 1.5 GHz Frequencies

Long-Fei Chen, Chao-Wei Tsai, Jian-Yang Li +11

We used the Five-hundred-meter Aperture Spherical radio Telescope (FAST) to search for the molecular emissions in the L-band between 1.0 and 1.5 GHz toward four comets, C/2020 F3 (…

astro-ph.EP2024★ 23 cited

GASTLI: An open-source coupled interior-atmosphere model to unveil gas giant composition

Lorena Acuña, Laura Kreidberg, Meng Zhai +1

The metal mass fractions of gas giants are a powerful tool to constrain their formation mechanisms and evolution. The metal content is inferred by comparing mass and radius measure…

astro-ph.EP2024★ 22 cited

Gliese 12 b: A temperate Earth-sized planet at 12 pc ideal for atmospheric transmission spectroscopy

M. Kuzuhara, A. Fukui, J. H. Livingston +103

Recent discoveries of Earth-sized planets transiting nearby M dwarfs have made it possible to characterize the atmospheres of terrestrial planets via follow-up spectroscopic observ…

astro-ph.EP2024

Dust and Volatiles in the Disintegrating Comet C/2019 Y4 (ATLAS)

Ruining Zhao, Aigen Li, Bin Yang +4

C/2019 Y4 (ATLAS) is an Oort cloud comet with an orbital period of 5895. Starting in March 2020, its nucleus underwent disintegration. In order to investigate the…

astro-ph.EP2023★ 47 cited

Systematic Reanalysis of KMTNet microlensing events, Paper I: Updates of the Photometry Pipeline and a New Planet Candidate

Hongjing Yang, Jennifer C. Yee, Kyu-Ha Hwang +52

In this work, we update and develop algorithms for KMTNet tender-love care (TLC) photometry in order to create an new, mostly automated, TLC pipeline. We then start a project to sy…

astro-ph.EP2023★ 34 cited

Planets Across Space and Time (PAST). V. The evolution of hot Jupiters revealed by the age distribution of their host stars

Di-Chang Chen, Ji-Wei Xie, Ji-Lin Zhou +11

The unexpected discovery of hot Jupiters challenged the classical theory of planet formation inspired by our solar system. Until now, the origin and evolution of hot Jupiters are s…

astro-ph.EP2023★ 7 cited

The Tianlin Mission: a 6m UV/Opt/IR space telescope to explore the habitable worlds and the universe

Wei Wang, Meng Zhai, Gang Zhao +7

[Abridged] It is expected that the ongoing and future space-borne planet survey missions including TESS, PLATO, and Earth 2.0 will detect thousands of small to medium-sized planets…

astro-ph.EP2023★ 3 cited

Atmospheric composition of WASP-85Ab with ESPRESSO/VLT observations

Zewen Jiang, Wei Wang, Guo Chen +9

Transit spectroscopy is the most frequently used technique to reveal the atmospheric properties of exoplanets, while that at high resolution has the advantage to resolve the small…