Asymmetrical nebula of the M33 variable GR290 (WR/LBV)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F20%3A00534446" target="_blank" >RIV/67985815:_____/20:00534446 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/20:00534446

Výsledek na webu

<a href="https://doi.org/10.1051/0004-6361/201936840" target="_blank" >https://doi.org/10.1051/0004-6361/201936840</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/201936840" target="_blank" >10.1051/0004-6361/201936840</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Asymmetrical nebula of the M33 variable GR290 (WR/LBV)

Popis výsledku v původním jazyce

GR 290 (M 33 V0532 = Romano's star) is a luminous M 33 object undergoing photometric variability typical for luminous blue variable stars. It lies inside the Wolf-Rayet region in the Hertzsprung-Russell diagram and possesses a WN8-type spectrum at the light minima. Analysis of Gran Telescopio Canarias spectra obtained in 2016 led to the conclusion that it is surrounded by an unresolved HII region formed mostly of ejected material from the central star and revealed the presence of a second, more extended asymmetrical emission region. The aim of his paper is to further explore the structure of the nearby environment of GR 290.Methods. Long-slit spectra of GR 290 were obtained with three slit orientations in the visual and red spectral regions. The emission-line distribution for each slit was analyzed.Results. We confirm the presence of an asymmetric HII region that extends similar to 50 pc to the south - similar to 30 pc to the north, and southeast, similar to 20 pc to the east and northwest, and similar to 10 pc to the west. We also present the first spectrum to be acquired of a star belonging to the neighboring OB 88 association, J013501.87+304157.3, which we classify as a B-type supergiant with a possible binary companion.

Název v anglickém jazyce

Asymmetrical nebula of the M33 variable GR290 (WR/LBV)

Popis výsledku anglicky

GR 290 (M 33 V0532 = Romano's star) is a luminous M 33 object undergoing photometric variability typical for luminous blue variable stars. It lies inside the Wolf-Rayet region in the Hertzsprung-Russell diagram and possesses a WN8-type spectrum at the light minima. Analysis of Gran Telescopio Canarias spectra obtained in 2016 led to the conclusion that it is surrounded by an unresolved HII region formed mostly of ejected material from the central star and revealed the presence of a second, more extended asymmetrical emission region. The aim of his paper is to further explore the structure of the nearby environment of GR 290.Methods. Long-slit spectra of GR 290 were obtained with three slit orientations in the visual and red spectral regions. The emission-line distribution for each slit was analyzed.Results. We confirm the presence of an asymmetric HII region that extends similar to 50 pc to the south - similar to 30 pc to the north, and southeast, similar to 20 pc to the east and northwest, and similar to 10 pc to the west. We also present the first spectrum to be acquired of a star belonging to the neighboring OB 88 association, J013501.87+304157.3, which we classify as a B-type supergiant with a possible binary companion.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Astronomy & Astrophysics

ISSN

1432-0746

e-ISSN

—

Svazek periodika

635

Číslo periodika v rámci svazku

April

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

10

Strana od-do

A201

Kód UT WoS článku

000524543400001

EID výsledku v databázi Scopus

2-s2.0-85083208860