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Recent Helioseismological Results from Space: Solar p-mode Oscillations from IPHIR on the PHOBOS Mission

Published online by Cambridge University Press:  12 April 2016

C. Fröhlich ,
T. Toutain ,
R.M. Bonnet ,
A.V. Bruns ,
J.P. Delaboudinière ,
V. Domingo ,
V.A. Kotov ,
Z. Kollath ,
D.N. Rashkovsky  and
J.C. Vial
...Show all authors
C. Fröhlich
Affiliation:
Physikalisch-Meteorologisches Observatorium Davos, World Radiation Center, CH-7260 Davos-Dorf
T. Toutain
Affiliation:
Laboratoire de Physique Stellaire et Planetaire, F-91370 Verrières-le-Buisson
R.M. Bonnet
Affiliation:
Science Directorate of ESA, F-75738 Paris Cedex 15
A.V. Bruns
Affiliation:
Crimean Astrophysical Observatory, Nauchny, Crimea 334413, USSR
J.P. Delaboudinière
Affiliation:
Laboratoire de Physique Stellaire et Planetaire, F-91370 Verrières-le-Buisson
V. Domingo
Affiliation:
Space Science Department of ESA, NL-2200 AG Noordwijk
V.A. Kotov
Affiliation:
Crimean Astrophysical Observatory, Nauchny, Crimea 334413, USSR
Z. Kollath
Affiliation:
Central Research Institute for Physics,H-1525 Budapest
D.N. Rashkovsky
Affiliation:
Crimean Astrophysical Observatory, Nauchny, Crimea 334413, USSR
J.C. Vial
Affiliation:
Laboratoire de Physique Stellaire et Planetaire, F-91370 Verrières-le-Buisson
Ch. Wehrli
Affiliation:
Physikalisch-Meteorologisches Observatorium Davos, World Radiation Center, CH-7260 Davos-Dorf

Abstract

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IPHIR (Interplanetary Helioseismology by IRradiance measurements) is a solar irradiance experiment on the USSR planetary mission PHOBOS to Mars and its satellite Phobos. The experiment was built by an international consortium including PMOD/WRC, LPSP, SSD/ESA, KrAO and CRIP. The sensor is a three channel sunphotometer (SPM) which measures the solar spectral irradiance at 335, 500 and 865 nm with a precision of better than 1 part-per-million (ppm). It is the first experiment dedicated to the investigation of solar oscillations from space. The results presented here are from a first evaluation of data gathered during 160 days of the cruise phase of PHOBOS II, launched on July, 12th 1988. The long uninterrupted observation produces a spectrum of the solar p-mode oscillations in the 5-minute range with a very high signal-to-noise ratio, which allows an accurate determination of frequencies and line shapes of these modes.

Type
Part 3: Helioseismology
Information
International Astronomical Union Colloquium , Volume 121: Inside the Sun , 1990 , pp. 279 - 288
Copyright
Copyright © Kluwer 1990

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