Rotationally Resolved Spectroscopic Characterization of Near-Earth Object (3200) Phaethon

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10385770" target="_blank" >RIV/00216208:11320/18:10385770 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.3847/1538-3881/aaeb8a" target="_blank" >https://doi.org/10.3847/1538-3881/aaeb8a</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-3881/aaeb8a" target="_blank" >10.3847/1538-3881/aaeb8a</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Rotationally Resolved Spectroscopic Characterization of Near-Earth Object (3200) Phaethon

Popis výsledku v původním jazyce

(3200) Phaethon is a compelling object as it has an asteroidal appearance and spectrum, produces a weak dust tail during perihelion at just 0.14 au, and is the parent body of the Geminid Meteor Shower. A better understanding of the physical properties of Phaethon is needed to understand the nature of its current and previous activity, relationship to potential source populations, and to plan for the upcoming flyby of the DESTINY+ spacecraft of Phaethon in the 2020s. We performed rotationally resolved spectroscopy of Phaethon at visible and near-infrared wavelengths (0.4-2.5 mu m) in 2007 and 2017, respectively, to better understand its surface properties. The visible and near-infrared observations both spanned nearly a full rotation or more and were under similar observing geometries, covering the entire surface with the exception of the north pole. The visible wavelengths show blue slopes with only minor slope variations and no absorption features. The NIR data is minimally varying and concave upwards, from very blue to blue-neutral with increasing wavelength. We fit the short-wavelength tail of Phaethon&apos;s thermal emission and retrieve an average visible albedo of p(v) = 0.08 +/- 0.01, which is lower than previous measurements but plausible in light of the recent larger radar-measured diameter of Phaethon. We retrieve an average infrared beaming parameter of Phaethon of eta = 1.70 +/- 0.05, which is similar to previous results. We discuss the implications of Phaethon&apos;s visible and near-infrared spectrum as well as the lower albedo on its origin, source population, and evolutionary history.

Název v anglickém jazyce

Rotationally Resolved Spectroscopic Characterization of Near-Earth Object (3200) Phaethon

Popis výsledku anglicky

(3200) Phaethon is a compelling object as it has an asteroidal appearance and spectrum, produces a weak dust tail during perihelion at just 0.14 au, and is the parent body of the Geminid Meteor Shower. A better understanding of the physical properties of Phaethon is needed to understand the nature of its current and previous activity, relationship to potential source populations, and to plan for the upcoming flyby of the DESTINY+ spacecraft of Phaethon in the 2020s. We performed rotationally resolved spectroscopy of Phaethon at visible and near-infrared wavelengths (0.4-2.5 mu m) in 2007 and 2017, respectively, to better understand its surface properties. The visible and near-infrared observations both spanned nearly a full rotation or more and were under similar observing geometries, covering the entire surface with the exception of the north pole. The visible wavelengths show blue slopes with only minor slope variations and no absorption features. The NIR data is minimally varying and concave upwards, from very blue to blue-neutral with increasing wavelength. We fit the short-wavelength tail of Phaethon&apos;s thermal emission and retrieve an average visible albedo of p(v) = 0.08 +/- 0.01, which is lower than previous measurements but plausible in light of the recent larger radar-measured diameter of Phaethon. We retrieve an average infrared beaming parameter of Phaethon of eta = 1.70 +/- 0.05, which is similar to previous results. We discuss the implications of Phaethon&apos;s visible and near-infrared spectrum as well as the lower albedo on its origin, source population, and evolutionary history.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GC18-04514J" target="_blank" >GC18-04514J: Na hraně rozpadu - fyzikální vlastnosti rychle rotujících multikilometrových planetek</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

The Astronomical Journal

ISSN

0004-6256

e-ISSN

—

Svazek periodika

156

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

—

Kód UT WoS článku

000451612100010

EID výsledku v databázi Scopus

—