SIMBAD references

1999A&A...346...33A - Astronomy and Astrophysics, volume 346, 33-44 (1999/6-1)

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


Abstract (from CDS):

We present VIJHK photometry for stars in a 0.8x2.0kpc2 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 logTeff diagram of the galaxy and compare the results with the theoretical isochrones of Bertelli et al. (1994A&AS..106..275B) for Z=0.004 and Y=0.24. The comparison suggests that most of the stars detected in the IR are 109yr 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.

Abstract Copyright:

Journal keyword(s): stars: Hertzsprung-Russel (HR) and C-M diagrams - galaxies: abundances - galaxies: evolution - galaxies: individual: NGC 3109 - galaxies: irregular - infrared: galaxies

Nomenclature: Table 3: [AMZ99] NN (Nos 1-65).

Simbad objects: 18

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