Resonant Chains and the Convergent Migration of Planets in Protoplanetary Disks

Autor: Ka Ho Wong, Man Hoi Lee

Publikováno v: The Astronomical Journal, Vol 167, Iss 3, p 112 (2024)

An increasing number of compact planetary systems with multiple planets in a resonant chain have been detected. The resonant chain must be maintained by convergent migration of the planets due to planet–disk interactions if it is formed before the

Externí odkaz: https://doaj.org/article/c1a7d62d0b7841d7b1e29fbfbee4437a

Scattering of Giant Planets Around M-dwarf: The Implication for the Origin of the Hierarchical and Eccentric Two-planet System like GJ 1148

Autor: Longhui Yuan, Man Hoi Lee

GJ 1148 is an M-dwarf star, which has two well-separated Saturn mass planets with an orbital period ratio of around 13 and eccentricities of around 0.375 at the current epoch. A plausible scenario for producing the orbital architecture of the GJ 1148

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a7d6c386b731555affa07b5725c5dfab
https://doi.org/10.5194/egusphere-egu23-16843

A new third planet and the dynamical architecture of the HD33142 planetary system

Autor: Trifon Trifonov, Anna Wollbold, Martin Kürster, Jan Eberhardt, Stephan Stock, Thomas Henning, Sabine Reffert, R. Paul Butler, Steven S. Vogt, Ansgar Reiners, Man Hoi Lee, Bertram Bitsch, Mathias Zechmeister, Florian Rodler, Volker Perdelwitz, Lev Tal-Or, Jan Rybizki, Paul Heeren, Davide Gandolfi, Oscar Barragán, Olga Zakhozhay, Paula Sarkis, Marcelo Tala Pinto, Diana Kossakowski, Vera Wolthoff, Stefan S. Brems, Vera Maria Passegger

Based on recently-taken and archival HARPS, FEROS and HIRES radial velocities (RVs), we present evidence for a new planet orbiting the first ascent red giant star HD33142 (with an improved mass estimate of 1.52$\pm$0.03 M$_\odot$), already known to h

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39d55f7565f675529e3b23b02bc6ebe7
http://arxiv.org/abs/2206.03899

A Parameter for Quantifying the Macroscale Asymmetry of Tropical Cyclone Cloud Clusters

Autor: Yongqiang Zong, Kelvin Sai-cheong Ng, Man Hoi Lee

Publikováno v: Journal of Atmospheric and Oceanic Technology. 37:1603-1622

A parameter to quantify macroscale (i.e., systemwide) asymmetry of tropical cyclones (TC) in infrared satellite images, galaxy asymmetry (GASYM), which is adopted from astronomy, is described. In addition, an alternative approach to identify TC cloud

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::40f7e2d6548a4f0da1cd0cfbd21ac0e4
https://doi.org/10.1175/jtech-d-19-0160.1

Precise radial velocities of giant stars:XV. Mysterious nearly periodic radial velocity variations in the eccentric binary ϵ Cygni

Autor: Andreas Quirrenbach, Pere L. Palle, Sabine Reffert, Torben Arentoft, M. F. Andersen, Victoria Antoci, Frank Grundahl, P. Heeren, K. H. Wong, Trifon Trifonov, Simon Albrecht, Man Hoi Lee, Jorge Lillo-Box

Publikováno v: Heeren, P, Reffert, S, Trifonov, T, Wong, K H, Lee, M H, Lillo-Box, J, Quirrenbach, A, Arentoft, T, Albrecht, S, Grundahl, F, Andersen, M F, Antoci, V & Pallé, P L 2021, ' Precise radial velocities of giant stars : XV. Mysterious nearly periodic radial velocity variations in the eccentric binary ϵ Cygni ', Astronomy and Astrophysics, vol. 647, A160 . https://doi.org/10.1051/0004-6361/202040087
DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacial
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Using the Hamilton Echelle Spectrograph at Lick Observatory, we have obtained precise radial velocities (RVs) of a sample of 373 G- and K-giant stars over more than 12 years, leading to the discovery of several single and multiple planetary systems.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::80286b058232c5cd219e64ebd8b6065a
https://orbit.dtu.dk/en/publications/ad898e4a-574a-40f4-8423-5c9121d657d7