Massive open star clusters using the VVV survey IV. WR 62-2, a new very massive star in the core of the VVV CL041 cluster

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F15%3A00456015" target="_blank" >RIV/67985815:_____/15:00456015 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1051/0004-6361/201525958" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201525958</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/201525958" target="_blank" >10.1051/0004-6361/201525958</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Massive open star clusters using the VVV survey IV. WR 62-2, a new very massive star in the core of the VVV CL041 cluster

Popis výsledku v původním jazyce

We present the fourth article in a series of papers focussed on young and massive clusters discovered in the VVV survey. This article is dedicated to the cluster VVV CL041, which contains a new very massive star candidate, WR62-2. Following the methodology presented in the first paper of the series, wide-field, deep JHK(s) VVV observations, combined with new infrared spectroscopy, are employed to constrain fundamental parameters (distance, reddening, mass, age) of VVV CL041. We confirm that the cluster VVV CL041 is a young (less than 4 Myr) and massive (3 +/- 2 x 10(3) M-circle dot) cluster, and not a simple asterism. It is located at a distance of 4.2 +/- 0.9 kpc, and its reddening is A(V) = 8.0 +/- 0.2mag, which is slightly lower than the average for the young clusters towards the centre of the Galaxy. Spectral analysis shows that the most luminous star of the cluster, of the WN8h spectral type, is a candidate to have an initial mass larger than 100 M-circle dot.

Název v anglickém jazyce

Massive open star clusters using the VVV survey IV. WR 62-2, a new very massive star in the core of the VVV CL041 cluster

Popis výsledku anglicky

We present the fourth article in a series of papers focussed on young and massive clusters discovered in the VVV survey. This article is dedicated to the cluster VVV CL041, which contains a new very massive star candidate, WR62-2. Following the methodology presented in the first paper of the series, wide-field, deep JHK(s) VVV observations, combined with new infrared spectroscopy, are employed to constrain fundamental parameters (distance, reddening, mass, age) of VVV CL041. We confirm that the cluster VVV CL041 is a young (less than 4 Myr) and massive (3 +/- 2 x 10(3) M-circle dot) cluster, and not a simple asterism. It is located at a distance of 4.2 +/- 0.9 kpc, and its reddening is A(V) = 8.0 +/- 0.2mag, which is slightly lower than the average for the young clusters towards the centre of the Galaxy. Spectral analysis shows that the most luminous star of the cluster, of the WN8h spectral type, is a candidate to have an initial mass larger than 100 M-circle dot.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GA14-02385S" target="_blank" >GA14-02385S: Přenos polarizovaného záření ve hvězdných atmosférách</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

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

584

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

8

Strana od-do

"A31/1"-"A31/8"

Kód UT WoS článku

000366936800031

EID výsledku v databázi Scopus

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