OGLE-2017-BLG-0039: Microlensing Event with Light from a Lens Identified from Mass Measurement

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10391212" target="_blank" >RIV/00216208:11320/18:10391212 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.3847/1538-4357/aae536" target="_blank" >https://doi.org/10.3847/1538-4357/aae536</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-4357/aae536" target="_blank" >10.3847/1538-4357/aae536</a>

Jazyk výsledku

angličtina

Název v původním jazyce

OGLE-2017-BLG-0039: Microlensing Event with Light from a Lens Identified from Mass Measurement

Popis výsledku v původním jazyce

We present an analysis of the caustic-crossing binary microlensing event OGLE-2017-BLG-0039. Thanks to the very long duration of the event, with a time scale t(E) similar to 130 days, the microlens parallax is measured precisely despite its low value of pi(E) similar to 0.06. Analysis of the well-resolved caustic crossings during the source star&apos;s entrance and exit of the caustic yields an angular Einstein radius of theta(E) similar to 0.6 mas. The measured pi(E) and theta(E) indicate that the lens is a binary composed of two stars with masses similar to 1.0 M-circle dot and similar to 0.15 M-circle dot, and is located at a distance of similar to 6 kpc. From the color and brightness of the lens estimated from its determined mass and distance, it is expected that similar to 2/3 of the I-band blended flux comes from the lens. Therefore, the event is a rare case of a bright lens event for which high-resolution follow-up observations can confirm its nature.

Název v anglickém jazyce

OGLE-2017-BLG-0039: Microlensing Event with Light from a Lens Identified from Mass Measurement

Popis výsledku anglicky

We present an analysis of the caustic-crossing binary microlensing event OGLE-2017-BLG-0039. Thanks to the very long duration of the event, with a time scale t(E) similar to 130 days, the microlens parallax is measured precisely despite its low value of pi(E) similar to 0.06. Analysis of the well-resolved caustic crossings during the source star&apos;s entrance and exit of the caustic yields an angular Einstein radius of theta(E) similar to 0.6 mas. The measured pi(E) and theta(E) indicate that the lens is a binary composed of two stars with masses similar to 1.0 M-circle dot and similar to 0.15 M-circle dot, and is located at a distance of similar to 6 kpc. From the color and brightness of the lens estimated from its determined mass and distance, it is expected that similar to 2/3 of the I-band blended flux comes from the lens. Therefore, the event is a rare case of a bright lens event for which high-resolution follow-up observations can confirm its nature.

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

2018

Kód důvěrnosti údajů

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

Název periodika

Astrophysical Journal

ISSN

0004-637X

e-ISSN

—

Svazek periodika

867

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

—

Kód UT WoS článku

000450221700003

EID výsledku v databázi Scopus

2-s2.0-85056711501