The Mendoza photometric system

Basic Reference

Mendoza V E.E. 1976, Rev. mex. Astron. Astrofis. 1, 363

Abstract

This paper presents alpha and lambda photometry of 44 members of the Hyades open cluster, all the stars from A3 to F4. Present and previous results confirm that the alpha and lambda photometric systems are suitable to distinguish very easily two groups of objects: the high luminosity and the metallic-line (Am) stars.

Content

Access to the data and references

Asiago Database on Photometric System (ADPS)

Indices and Parameters

V, a35, L16, a16, L9

Filters

The alpha(35), Lambda(16) photometric system

The Lambda interference filters:

7775
Peak wavelength: 7755 Å ; Width 20 Å
7772
Peak wavelength: 7772 Å ; Width 25 Å
7792
Peak wavelength: 7792 Å ; Width 25 Å
The lambda interference filters:

7748
Peak wavelength: 7747.7 Å ; Width 14 Å
7776
Peak wavelength: 7775.6 Å ; Width 16 Å
7805
Peak wavelength: 7805.3 Å ; Width 12.5 Å
The alpha interference filters:

6497
Peak wavelength: 6497.0 Å ; Width 37 Å
6566
Peak wavelength: 6566.0 Å ; Width 35 Å
6639
Peak wavelength: 6639.0 Å ; Width 138 Å

The alpha(16), Lambda(9) photometric system

The "continuum" filters are the exactly those of the (alpha, lambda) system. The line filters are:

6567
Peak wavelength: 6567.4 Å ; Width 16.2 Å
7776
Peak wavelength: 7776.4 Å ; Width 9.0 Å

Photomultiplier

RCA C-31034
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Jean-Claude.Mermilliod@obs.unige.ch
Last update: 13 September 2002