SIMBAD references

2008ApJ...678..179S - Astrophys. J., 678, 179-186 (2008/May-1)

A new red giant-based distance modulus of 13.3 mpc to The Antennae galaxies and its consequences.

SAVIANE I., MOMANY Y., DA COSTA G.S., RICH R.M. and HIBBARD J.E.

Abstract (from CDS):

The Antennae galaxies are the closest example of an ongoing major galaxy merger and, as such, represent a unique laboratory for furthering the understanding of the formation of exotic objects (e.g., tidal dwarf galaxies, ultraluminous X-ray sources, super stellar clusters). In a previous paper HST WFPC2 observations were used to demonstrate that the Antennae system might be at a distance considerably less than that conventionally assumed in the literature. Here we report new, much deeper HST ACS imaging that resolves the composite stellar populations and, most importantly, reveals a well-defined red giant branch. The tip of this red giant branch (TRGB) is unambiguously detected at ITRGB0=26.65±0.09 mag. Adopting the most recent calibration of the luminosity of the TRGB then yields a distance modulus for the Antennae of (m-M)0=30.62±0.17 corresponding to a distance of 13.3±1.0 Mpc. This is consistent with our earlier result, once the different calibrations for the standard candle are considered. We briefly discuss the implications of this now well-determined shorter distance.

Abstract Copyright:

Journal keyword(s): Galaxies: Distances and Redshifts - Galaxies: Individual: NGC Number: NGC 4038 - Galaxies: Individual: NGC Number: NGC 4039 - Galaxies: Interactions - Galaxies: Peculiar - Galaxies: Stellar Content

CDS comments: Fig.1 + texte : S78 = [S78f] TDG

Simbad objects: 20

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