UBVI CCD photometry of M11 - II. New photometry and surface density profiles

Hwankyung Sung; M. S. Bessell; Hee Won Lee; Yong Hee Kang; See Woo Lee

doi:10.1046/j.1365-8711.1999.02961.x

UBVI CCD photometry of M11 - II. New photometry and surface density profiles

Hwankyung Sung^*, M. S. Bessell, Hee Won Lee, Yong Hee Kang, See Woo Lee

^*Corresponding author for this work

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

42 Citations (Scopus)

Abstract

Extensive UBVI CCD photometry has been obtained for the intermediate-age open cluster M11 (NGC 6705). From this new photometry we derive the cluster parameters [V₀ - M_v = 11.55 ± 0.10, E(B - V) = 0.428 ± 0.027 and radius = 16 arcmin] and age (log t_age = 8.4 ± 0.1). We also derive density profiles and confirm the mass segregation in M11. The slope of the mass function increases systematically with increasing radius from the centre. We also confirm the existence of main-sequence field stars having similar photometric characteristics to M11. A large population of field red giant stars is also found in the observed fields.

Original language	English
Pages (from-to)	982-1001
Number of pages	20
Journal	Monthly Notices of the Royal Astronomical Society
Volume	310
Issue number	4
DOIs	https://doi.org/10.1046/j.1365-8711.1999.02961.x
Publication status	Published - 21 Dec 1999

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title = "UBVI CCD photometry of M11 - II. New photometry and surface density profiles",

abstract = "Extensive UBVI CCD photometry has been obtained for the intermediate-age open cluster M11 (NGC 6705). From this new photometry we derive the cluster parameters [V0 - Mv = 11.55 ± 0.10, E(B - V) = 0.428 ± 0.027 and radius = 16 arcmin] and age (log tage = 8.4 ± 0.1). We also derive density profiles and confirm the mass segregation in M11. The slope of the mass function increases systematically with increasing radius from the centre. We also confirm the existence of main-sequence field stars having similar photometric characteristics to M11. A large population of field red giant stars is also found in the observed fields.",

keywords = "Hertzsprung, Open clusters and associations: individual: M11 (NGC 6705), Russell (HR) diagram, Stars: evolution, Stars: luminosity function, mass function",

author = "Hwankyung Sung and Bessell, {M. S.} and Lee, {Hee Won} and Kang, {Yong Hee} and Lee, {See Woo}",

year = "1999",

month = dec,

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doi = "10.1046/j.1365-8711.1999.02961.x",

language = "English",

volume = "310",

pages = "982--1001",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press ",

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TY - JOUR

T1 - UBVI CCD photometry of M11 - II. New photometry and surface density profiles

AU - Sung, Hwankyung

AU - Bessell, M. S.

AU - Lee, Hee Won

AU - Kang, Yong Hee

AU - Lee, See Woo

PY - 1999/12/21

Y1 - 1999/12/21

N2 - Extensive UBVI CCD photometry has been obtained for the intermediate-age open cluster M11 (NGC 6705). From this new photometry we derive the cluster parameters [V0 - Mv = 11.55 ± 0.10, E(B - V) = 0.428 ± 0.027 and radius = 16 arcmin] and age (log tage = 8.4 ± 0.1). We also derive density profiles and confirm the mass segregation in M11. The slope of the mass function increases systematically with increasing radius from the centre. We also confirm the existence of main-sequence field stars having similar photometric characteristics to M11. A large population of field red giant stars is also found in the observed fields.

AB - Extensive UBVI CCD photometry has been obtained for the intermediate-age open cluster M11 (NGC 6705). From this new photometry we derive the cluster parameters [V0 - Mv = 11.55 ± 0.10, E(B - V) = 0.428 ± 0.027 and radius = 16 arcmin] and age (log tage = 8.4 ± 0.1). We also derive density profiles and confirm the mass segregation in M11. The slope of the mass function increases systematically with increasing radius from the centre. We also confirm the existence of main-sequence field stars having similar photometric characteristics to M11. A large population of field red giant stars is also found in the observed fields.

KW - Hertzsprung

KW - Open clusters and associations: individual: M11 (NGC 6705)

KW - Russell (HR) diagram

KW - Stars: evolution

KW - Stars: luminosity function, mass function

UR - http://www.scopus.com/inward/record.url?scp=0039597820&partnerID=8YFLogxK

U2 - 10.1046/j.1365-8711.1999.02961.x

DO - 10.1046/j.1365-8711.1999.02961.x

M3 - Article

SN - 0035-8711

VL - 310

SP - 982

EP - 1001

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

UBVI CCD photometry of M11 - II. New photometry and surface density profiles

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