Infrared photometry of the inner regions of the dwarf irregular galaxy NGC 3109

M. Victoria Alonso, Dante Minniti, Albert A. Zijlstra, Eline Tolstoy

Resultado de la investigación: Article

5 Citas (Scopus)

Resumen

We present VIJHK photometry for stars in a 0.8×2.0 kpc2 inner field of the dwarf irregular galaxy NGC 3109. The infrared photometry reaches 3 magnitudes fainter than previous work. Optical and infrared color-color and color-magnitude diagrams, and a bolometric luminosity function are constructed, confirming the presence of an intermediate-age stellar population. We also present a logL/L vs logTef f diagram of the galaxy and compare the results with the theoretical isochrones of Bertelli et al. (1994) for Z = 0.004 and Y = 0.24. The comparison suggests that most of the stars detected in the IR are 109 yr or younger. We compare the infrared color-magnitude diagrams of NGC 3109 with the composite color-magnitude diagrams of LMC clusters and of the outer disk of the Scd galaxy M33. They show similar stellar content in these late-type systems.

Idioma originalEnglish
Páginas (desde-hasta)33-44
Número de páginas12
PublicaciónAstronomy and Astrophysics
Volumen346
N.º1
EstadoPublished - 1 dic 1999

Huella dactilar

irregular galaxies
infrared photometry
color-magnitude diagram
dwarf galaxies
diagram
galaxies
color
stars
photometry
diagrams
luminosity
composite materials

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Alonso, M. Victoria ; Minniti, Dante ; Zijlstra, Albert A. ; Tolstoy, Eline. / Infrared photometry of the inner regions of the dwarf irregular galaxy NGC 3109. En: Astronomy and Astrophysics. 1999 ; Vol. 346, N.º 1. pp. 33-44.
@article{1e150dd57f2d4c368913ff26976dccf0,
title = "Infrared photometry of the inner regions of the dwarf irregular galaxy NGC 3109",
abstract = "We present VIJHK photometry for stars in a 0.8×2.0 kpc2 inner field of the dwarf irregular galaxy NGC 3109. The infrared photometry reaches 3 magnitudes fainter than previous work. Optical and infrared color-color and color-magnitude diagrams, and a bolometric luminosity function are constructed, confirming the presence of an intermediate-age stellar population. We also present a logL/L⊙ vs logTef f diagram of the galaxy and compare the results with the theoretical isochrones of Bertelli et al. (1994) for Z = 0.004 and Y = 0.24. The comparison suggests that most of the stars detected in the IR are 109 yr or younger. We compare the infrared color-magnitude diagrams of NGC 3109 with the composite color-magnitude diagrams of LMC clusters and of the outer disk of the Scd galaxy M33. They show similar stellar content in these late-type systems.",
keywords = "Galaxies: Abundances, Galaxies: Evolution, Galaxies: Individual: NGC 3109, Galaxies: Irregular, Infrared: Galaxies, Stars: Hertzsprung-Russel (HR) and C-M diagrams",
author = "Alonso, {M. Victoria} and Dante Minniti and Zijlstra, {Albert A.} and Eline Tolstoy",
year = "1999",
month = "12",
day = "1",
language = "English",
volume = "346",
pages = "33--44",
journal = "Astronomy and Astrophysics",
issn = "0004-6361",
publisher = "EDP Sciences",
number = "1",

}

Alonso, MV, Minniti, D, Zijlstra, AA & Tolstoy, E 1999, 'Infrared photometry of the inner regions of the dwarf irregular galaxy NGC 3109', Astronomy and Astrophysics, vol. 346, n.º 1, pp. 33-44.

Infrared photometry of the inner regions of the dwarf irregular galaxy NGC 3109. / Alonso, M. Victoria; Minniti, Dante; Zijlstra, Albert A.; Tolstoy, Eline.

En: Astronomy and Astrophysics, Vol. 346, N.º 1, 01.12.1999, p. 33-44.

Resultado de la investigación: Article

TY - JOUR

T1 - Infrared photometry of the inner regions of the dwarf irregular galaxy NGC 3109

AU - Alonso, M. Victoria

AU - Minniti, Dante

AU - Zijlstra, Albert A.

AU - Tolstoy, Eline

PY - 1999/12/1

Y1 - 1999/12/1

N2 - We present VIJHK photometry for stars in a 0.8×2.0 kpc2 inner field of the dwarf irregular galaxy NGC 3109. The infrared photometry reaches 3 magnitudes fainter than previous work. Optical and infrared color-color and color-magnitude diagrams, and a bolometric luminosity function are constructed, confirming the presence of an intermediate-age stellar population. We also present a logL/L⊙ vs logTef f diagram of the galaxy and compare the results with the theoretical isochrones of Bertelli et al. (1994) for Z = 0.004 and Y = 0.24. The comparison suggests that most of the stars detected in the IR are 109 yr or younger. We compare the infrared color-magnitude diagrams of NGC 3109 with the composite color-magnitude diagrams of LMC clusters and of the outer disk of the Scd galaxy M33. They show similar stellar content in these late-type systems.

AB - We present VIJHK photometry for stars in a 0.8×2.0 kpc2 inner field of the dwarf irregular galaxy NGC 3109. The infrared photometry reaches 3 magnitudes fainter than previous work. Optical and infrared color-color and color-magnitude diagrams, and a bolometric luminosity function are constructed, confirming the presence of an intermediate-age stellar population. We also present a logL/L⊙ vs logTef f diagram of the galaxy and compare the results with the theoretical isochrones of Bertelli et al. (1994) for Z = 0.004 and Y = 0.24. The comparison suggests that most of the stars detected in the IR are 109 yr or younger. We compare the infrared color-magnitude diagrams of NGC 3109 with the composite color-magnitude diagrams of LMC clusters and of the outer disk of the Scd galaxy M33. They show similar stellar content in these late-type systems.

KW - Galaxies: Abundances

KW - Galaxies: Evolution

KW - Galaxies: Individual: NGC 3109

KW - Galaxies: Irregular

KW - Infrared: Galaxies

KW - Stars: Hertzsprung-Russel (HR) and C-M diagrams

UR - http://www.scopus.com/inward/record.url?scp=0040331955&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0040331955

VL - 346

SP - 33

EP - 44

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

IS - 1

ER -