The Distance to NGC 5904 (M 5) via the Subdwarfs Main Sequence Fitting Method

Abstract

We present a determination of the distance modulus of the globular cluster NGC 5904 (M 5), obtained by means of the subdwarf main-sequence fitting on the (V,V-I) color-magnitude diagram. The subdwarf sample has been selected from the HIPPARCOS catalog in a metallicity range homogeneous with the cluster ([Fe/H] \~= -1.1). Both the cluster and the subdwarfs have been observed with the same telescope+instrument+filters setup (namely, ESO-NTT equipped with the SUSI2 camera), in order to preserve homogeneity and reduce systematic uncertainties. A set of archival HST data has then been used to obtain a deep and precise ridge line. These have been accurately calibrated in the ground photometric system by using the NTT data and used to fit the cluster distance modulus. By adopting the most commonly accepted values for the reddening, E(B-V) = 0.035 and 0.03, we obtain respectively mu_0 = 14.44 +- 0.09 +- 0.07 and mu_0 = 14.41 +- 0.09 +- 0.07, in agreement with recent determinations.

11 pages, 14 figures, accepted for publication in Astronomy and Astrophysics

References in corpus (14)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• Abundances for Globular Cluster Giants: I. Homogeneous Metallicities for 24 Clusters
• Distances, ages, and epoch of formation of globular clusters
• Distances and ages of NGC 6397, NGC 6752 and 47 Tuc
• The Charge Transfer Efficiency and Calibration of WFPC2
• Ages of Globular Clusters from Hipparcos Parallaxes of Local Subdwarfs
• The Age Of Globular Clusters In Light Of Hipparcos: Resolving the Age Problem?
• Younger and brighter - New distances to globular clusters based on Hipparcos parallax measurements of local subdwarfs
• CCD Photometry of the Globular Cluster M5. I. The Color-Magnitude Diagram and Luminosity Functions
• Abundances in Stars from the Red Giant Branch Tip to Near the Main Sequence Turn Off in M5
• Photometric catalog of nearby globular clusters (II)
• The distance to NGC 6397 by M-subdwarf main-sequence fitting
• Old open clusters: UBGVRI photometry of NGC 2506
• A search for previously unrecognised metal-poor subdwarfs in the Hipparcos astrometric catalogue

Cited by in corpus (3)

• Accurate distances to Galactic globular clusters through a combination of Gaia EDR3, HST and literature data
• The Far Ultraviolet Spectroscopic Explorer Survey of OVI Absorption in the Disk of the Milky Way
• Deep Photometry of the Globular Cluster M5: Distance Estimates from White Dwarf and Main Sequence Stars