UBVRI and Hα photometry of the young open cluster NGC 6530

Hwankyung Sung; Moo Young Chun; Michael S. Bessell

doi:10.1086/301450

UBVRI and Hα photometry of the young open cluster NGC 6530

Hwankyung Sung^*, Moo Young Chun, Michael S. Bessell

^*Corresponding author for this work

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

81 Citations (Scopus)

Abstract

New UBVRI and Hα photometry has been obtained for the young open cluster NGC 6530 located 10′ east of the Lagoon Nebula (M8). We found 37 pre-main-sequence (PMS) stars with Hα emission and nine PMS candidates using the R - Hα color, a measure of Hα emission. From this new photometry we derived the cluster parameters (V₀ - M_v = 11.25 ± 0.1 mag and 〈E(B-V)〉 = 0.35 mag), typical age (1.5 Myr), and an age spread of about 5 Myr. We confirmed the presence of a small amount of differential reddening across the cluster. We also verified the abnormal reddening law for the cluster, especially for a heavily embedded O7 V star, Herschel 36. Comparisons were made for several PMS evolution models with regard to the resulting age distribution and the initial mass function.

Original language	English
Pages (from-to)	333-348
Number of pages	16
Journal	Astronomical Journal
Volume	120
Issue number	1
DOIs	https://doi.org/10.1086/301450
Publication status	Published - Jul 2000

Access to Document

10.1086/301450

Cite this

@article{c21c62371e31436a97ce3a39f509f326,

title = "UBVRI and Hα photometry of the young open cluster NGC 6530",

abstract = "New UBVRI and Hα photometry has been obtained for the young open cluster NGC 6530 located 10′ east of the Lagoon Nebula (M8). We found 37 pre-main-sequence (PMS) stars with Hα emission and nine PMS candidates using the R - Hα color, a measure of Hα emission. From this new photometry we derived the cluster parameters (V0 - Mv = 11.25 ± 0.1 mag and 〈E(B-V)〉 = 0.35 mag), typical age (1.5 Myr), and an age spread of about 5 Myr. We confirmed the presence of a small amount of differential reddening across the cluster. We also verified the abnormal reddening law for the cluster, especially for a heavily embedded O7 V star, Herschel 36. Comparisons were made for several PMS evolution models with regard to the resulting age distribution and the initial mass function.",

keywords = "Color-magnitude diagrams, Open clusters and associations: individual (NGC 6530), Stars: early-type, Stars: pre-main-sequence",

author = "Hwankyung Sung and Chun, {Moo Young} and Bessell, {Michael S.}",

year = "2000",

month = jul,

doi = "10.1086/301450",

language = "English",

volume = "120",

pages = "333--348",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "American Astronomical Society",

number = "1",

}

TY - JOUR

T1 - UBVRI and Hα photometry of the young open cluster NGC 6530

AU - Sung, Hwankyung

AU - Chun, Moo Young

AU - Bessell, Michael S.

PY - 2000/7

Y1 - 2000/7

N2 - New UBVRI and Hα photometry has been obtained for the young open cluster NGC 6530 located 10′ east of the Lagoon Nebula (M8). We found 37 pre-main-sequence (PMS) stars with Hα emission and nine PMS candidates using the R - Hα color, a measure of Hα emission. From this new photometry we derived the cluster parameters (V0 - Mv = 11.25 ± 0.1 mag and 〈E(B-V)〉 = 0.35 mag), typical age (1.5 Myr), and an age spread of about 5 Myr. We confirmed the presence of a small amount of differential reddening across the cluster. We also verified the abnormal reddening law for the cluster, especially for a heavily embedded O7 V star, Herschel 36. Comparisons were made for several PMS evolution models with regard to the resulting age distribution and the initial mass function.

AB - New UBVRI and Hα photometry has been obtained for the young open cluster NGC 6530 located 10′ east of the Lagoon Nebula (M8). We found 37 pre-main-sequence (PMS) stars with Hα emission and nine PMS candidates using the R - Hα color, a measure of Hα emission. From this new photometry we derived the cluster parameters (V0 - Mv = 11.25 ± 0.1 mag and 〈E(B-V)〉 = 0.35 mag), typical age (1.5 Myr), and an age spread of about 5 Myr. We confirmed the presence of a small amount of differential reddening across the cluster. We also verified the abnormal reddening law for the cluster, especially for a heavily embedded O7 V star, Herschel 36. Comparisons were made for several PMS evolution models with regard to the resulting age distribution and the initial mass function.

KW - Color-magnitude diagrams

KW - Open clusters and associations: individual (NGC 6530)

KW - Stars: early-type

KW - Stars: pre-main-sequence

UR - http://www.scopus.com/inward/record.url?scp=0000468803&partnerID=8YFLogxK

U2 - 10.1086/301450

DO - 10.1086/301450

M3 - Article

SN - 0004-6256

VL - 120

SP - 333

EP - 348

JO - Astronomical Journal

JF - Astronomical Journal

IS - 1

ER -

UBVRI and Hα photometry of the young open cluster NGC 6530

Abstract

Access to Document

Other files and links

Fingerprint

Cite this