Massive open star clusters using the VVV survey. V. Young clusters with an OB stellar population

S. Ramírez Alegría; J. Borissova; A. -N. Chené; C. Bonatto; R. Kurtev; P. Amigo; M. Kuhn; M. Gromadzki; J. A. Carballo-Bello

doi:10.1051/0004-6361/201526618

Massive open star clusters using the VVV survey. V. Young clusters with an OB stellar population

S. Ramírez Alegría, J. Borissova, A. -N. Chené, C. Bonatto, R. Kurtev, P. Amigo, M. Kuhn, M. Gromadzki, J. A. Carballo-Bello

Research output: Contribution to journal › Article › peer-review

Abstract

Context. The ESO public survey VISTA Variables in the Vía Láctea (VVV) has contributed with deep multi-epoch photometry of the Galactic bulge and the adjacent part of the disk over 526 sq. deg. More than a hundred cluster candidates have been reported thanks to this survey.
Aims: We present the fifth article in a series of papers focused on young and massive clusters discovered in the VVV survey. In this paper, we present the physical characterization of five clusters with a spectroscopically confirmed OB-type stellar population.
Methods: To characterize the clusters, we used near-infrared photometry (J, H, and K_S) from the VVV survey and near-infrared K-band spectroscopy from ISAAC at VLT, following the methodology presented in the previous articles of the series.
Results: All clusters in our sample are very young (ages between 1-20 Myr), and their total mass are between (1.07^+0.40_-0.30)×10² M_⊙ and (4.17^+4.15_-2.08)×10³ M_⊙. We observed a relation between the clusters total mass M_ecl and the mass of their most massive stellar member m_max, for clusters with an age Based on observations taken within the ESO VISTA Public Survey VVV (programme ID 179.B-2002), and with ISAAC/VLT (programme 087.D-0341(A)).

Original language	English
Pages (from-to)	A40
Journal	Astronomy & Astrophysics Letters
Volume	588
DOIs	https://doi.org/10.1051/0004-6361/201526618
Publication status	Published - 1 Apr 2016

Keywords

stars: early-type
stars: massive
techniques: photometric
techniques: spectroscopic
Galaxy: disk
open clusters and associations: general
Astrophysics - Solar and Stellar Astrophysics
Astrophysics - Astrophysics of Galaxies

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10.1051/0004-6361/201526618

https://ui.adsabs.harvard.edu/abs/2016A&A...588A..40R

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@article{72460bcae995493db7682aed9b2c9338,

title = "Massive open star clusters using the VVV survey. V. Young clusters with an OB stellar population",

abstract = "Context. The ESO public survey VISTA Variables in the V{\'i}a L{\'a}ctea (VVV) has contributed with deep multi-epoch photometry of the Galactic bulge and the adjacent part of the disk over 526 sq. deg. More than a hundred cluster candidates have been reported thanks to this survey. Aims: We present the fifth article in a series of papers focused on young and massive clusters discovered in the VVV survey. In this paper, we present the physical characterization of five clusters with a spectroscopically confirmed OB-type stellar population. Methods: To characterize the clusters, we used near-infrared photometry (J, H, and KS) from the VVV survey and near-infrared K-band spectroscopy from ISAAC at VLT, following the methodology presented in the previous articles of the series. Results: All clusters in our sample are very young (ages between 1-20 Myr), and their total mass are between (1.07+0.40-0.30)×102 M⊙ and (4.17+4.15-2.08)×103 M⊙. We observed a relation between the clusters total mass Mecl and the mass of their most massive stellar member mmax, for clusters with an age Based on observations taken within the ESO VISTA Public Survey VVV (programme ID 179.B-2002), and with ISAAC/VLT (programme 087.D-0341(A)).",

keywords = "stars: early-type, stars: massive, techniques: photometric, techniques: spectroscopic, Galaxy: disk, open clusters and associations: general, Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Astrophysics of Galaxies",

author = "{Ram{\'i}rez Alegr{\'i}a}, S. and J. Borissova and Chen{\'e}, {A. -N.} and C. Bonatto and R. Kurtev and P. Amigo and M. Kuhn and M. Gromadzki and Carballo-Bello, {J. A.}",

year = "2016",

month = apr,

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doi = "10.1051/0004-6361/201526618",

language = "English",

volume = "588",

pages = "A40",

journal = "Astronomy & Astrophysics Letters",

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TY - JOUR

T1 - Massive open star clusters using the VVV survey. V. Young clusters with an OB stellar population

AU - Ramírez Alegría, S.

AU - Borissova, J.

AU - Chené, A. -N.

AU - Bonatto, C.

AU - Kurtev, R.

AU - Amigo, P.

AU - Kuhn, M.

AU - Gromadzki, M.

AU - Carballo-Bello, J. A.

PY - 2016/4/1

Y1 - 2016/4/1

N2 - Context. The ESO public survey VISTA Variables in the Vía Láctea (VVV) has contributed with deep multi-epoch photometry of the Galactic bulge and the adjacent part of the disk over 526 sq. deg. More than a hundred cluster candidates have been reported thanks to this survey. Aims: We present the fifth article in a series of papers focused on young and massive clusters discovered in the VVV survey. In this paper, we present the physical characterization of five clusters with a spectroscopically confirmed OB-type stellar population. Methods: To characterize the clusters, we used near-infrared photometry (J, H, and KS) from the VVV survey and near-infrared K-band spectroscopy from ISAAC at VLT, following the methodology presented in the previous articles of the series. Results: All clusters in our sample are very young (ages between 1-20 Myr), and their total mass are between (1.07+0.40-0.30)×102 M⊙ and (4.17+4.15-2.08)×103 M⊙. We observed a relation between the clusters total mass Mecl and the mass of their most massive stellar member mmax, for clusters with an age Based on observations taken within the ESO VISTA Public Survey VVV (programme ID 179.B-2002), and with ISAAC/VLT (programme 087.D-0341(A)).

AB - Context. The ESO public survey VISTA Variables in the Vía Láctea (VVV) has contributed with deep multi-epoch photometry of the Galactic bulge and the adjacent part of the disk over 526 sq. deg. More than a hundred cluster candidates have been reported thanks to this survey. Aims: We present the fifth article in a series of papers focused on young and massive clusters discovered in the VVV survey. In this paper, we present the physical characterization of five clusters with a spectroscopically confirmed OB-type stellar population. Methods: To characterize the clusters, we used near-infrared photometry (J, H, and KS) from the VVV survey and near-infrared K-band spectroscopy from ISAAC at VLT, following the methodology presented in the previous articles of the series. Results: All clusters in our sample are very young (ages between 1-20 Myr), and their total mass are between (1.07+0.40-0.30)×102 M⊙ and (4.17+4.15-2.08)×103 M⊙. We observed a relation between the clusters total mass Mecl and the mass of their most massive stellar member mmax, for clusters with an age Based on observations taken within the ESO VISTA Public Survey VVV (programme ID 179.B-2002), and with ISAAC/VLT (programme 087.D-0341(A)).

KW - stars: early-type

KW - stars: massive

KW - techniques: photometric

KW - techniques: spectroscopic

KW - Galaxy: disk

KW - open clusters and associations: general

KW - Astrophysics - Solar and Stellar Astrophysics

KW - Astrophysics - Astrophysics of Galaxies

U2 - 10.1051/0004-6361/201526618

DO - 10.1051/0004-6361/201526618

M3 - Article

SN - 0004-6361

VL - 588

SP - A40

JO - Astronomy & Astrophysics Letters

JF - Astronomy & Astrophysics Letters

ER -

Massive open star clusters using the VVV survey. V. Young clusters with an OB stellar population

Abstract

Keywords

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