The Newell photometric system

Basic Reference

Newell E.B., Rodgers A.W., Searle L. 1969, ApJ 156, 597

Newell E.B. 1973, ApJ Suppl. 26, 37

Abstract

From spectroscopic and narrow-band photoelectric observations we have derived the atmospheric parameters log g and theta for 19 blue horizontal-branch stars in the globular cluster NGC 6397. These data have been combined with measurements of the cluster reddening and distance modulus to yield a mean mass = 0.55 +- 0.15 solar masses and a mean luminosity of = 1.64 +- 0.1. The blue horizontal-branch stars appear to occupy a wedge-shaped domain in the theoretical HR diagram.

Content

Access to the data and references

Asiago Database on Photometric System (ADPS)

Indices and Parameters

m53, C3542, C4253, gamma

Filters

Visual : interference filter from Thin Film Products
Lam_eff : 5305 Å ; Width : 155 Å
Blue : interference filter from Thin Film Products
Lam_eff : 4272 Å ; Width : 84 Å
Near-UV : interference filter from Thin Film Products
Lam_eff : 3535 Å ; Width : 78 Å

Photomultiplier


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Last update: 21 May 1996