Stellar occultation observations of (38628) Huya and its satellite: A detailed look into the system

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F25%3A00617660" target="_blank" >RIV/67985815:_____/25:00617660 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/47813059:19630/25:A0000481 RIV/00216208:11320/25:10511220

Výsledek na webu

<a href="https://hdl.handle.net/11104/0366063" target="_blank" >https://hdl.handle.net/11104/0366063</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/PSJ/adabc1" target="_blank" >10.3847/PSJ/adabc1</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Stellar occultation observations of (38628) Huya and its satellite: A detailed look into the system

Popis výsledku v původním jazyce

The physical and orbital parameters of trans-Neptunian objects provide valuable information about the solar system's formation and evolution. In particular, the characterization of binaries provides insights into the formation mechanisms that may be playing a role at such large distances from the Sun. Studies show two distinct populations, and (38628) Huya occupies an intermediate position between the unequal-sized binaries and those with components of roughly equal sizes. In this work, we predicted and observed three stellar occultation events by Huya. Huya and its satellitewere detected during occultations in 2021 March and again in 2023 June. Additionally, an attempt to detect Huya in 2023 February resulted in an additional single-chord detection of the secondary. A spherical body with a minimum diameter of D = 165 km can explain the three single-chord observations and provide a lower limit for the satellite size. The astrometry of Huya's system, as derived from the occultations and supplemented by observations from the Hubble Space Telescope and Keck Observatory, provided constraints on the satellite orbit and the mass of the system. Therefore, assuming the secondary is in an equatorial orbit around the primary, the limb fitting was constrained by the satellite orbit position angle. The system density, calculated by summing the most precise measurement of Huya's volume to the spherical satellite average volume, is rho 1 = 1073 +/- 66 kg m-3. The density that the object would have assuming a Maclaurin equilibrium shape with a rotational period of 6.725 +/- 0.01 hr is rho 2 = 768 +/- 42 kg m-3. This difference rules out the Maclaurin equilibrium assumption for the main body shape.

Název v anglickém jazyce

Stellar occultation observations of (38628) Huya and its satellite: A detailed look into the system

Popis výsledku anglicky

The physical and orbital parameters of trans-Neptunian objects provide valuable information about the solar system's formation and evolution. In particular, the characterization of binaries provides insights into the formation mechanisms that may be playing a role at such large distances from the Sun. Studies show two distinct populations, and (38628) Huya occupies an intermediate position between the unequal-sized binaries and those with components of roughly equal sizes. In this work, we predicted and observed three stellar occultation events by Huya. Huya and its satellitewere detected during occultations in 2021 March and again in 2023 June. Additionally, an attempt to detect Huya in 2023 February resulted in an additional single-chord detection of the secondary. A spherical body with a minimum diameter of D = 165 km can explain the three single-chord observations and provide a lower limit for the satellite size. The astrometry of Huya's system, as derived from the occultations and supplemented by observations from the Hubble Space Telescope and Keck Observatory, provided constraints on the satellite orbit and the mass of the system. Therefore, assuming the secondary is in an equatorial orbit around the primary, the limb fitting was constrained by the satellite orbit position angle. The system density, calculated by summing the most precise measurement of Huya's volume to the spherical satellite average volume, is rho 1 = 1073 +/- 66 kg m-3. The density that the object would have assuming a Maclaurin equilibrium shape with a rotational period of 6.725 +/- 0.01 hr is rho 2 = 768 +/- 42 kg m-3. This difference rules out the Maclaurin equilibrium assumption for the main body shape.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

The Planetary Science Journal

ISSN

2632-3338

e-ISSN

2632-3338

Svazek periodika

6

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

21

Strana od-do

48

Kód UT WoS článku

001427564600001

EID výsledku v databázi Scopus

2-s2.0-85219334494