Kurt W. Rothschild, Jean-Claude Pecker, Walter Orr Roberts,
... The Prominence of July 25, 1951. Rothschild, Kurt ; Pecker, Jean-Claude ; Roberts, Walter Orr Abstract The motions of 49 ...
Tópico(s): Intelligence, Security, War Strategy
1955 - IOP Publishing | The Astrophysical Journal
R. G. Athay, Donald H. Menzel, Jean-Claude Pecker, R. N. Thomas,
view Abstract Citations (46) References (10) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Thermodynamic State of the Outer Solar ATMOSPHERE.V.A.MODEL of the Chromosphere from the Continuum Emission. Athay, R. G. ; Menzel, D. H. ; Pecker, J. -C. ; Thomas, R. N. Abstract Four semi-independent analyses of 1952 eclipse data contribute to a determination of n and T in the solar chromosphere in the height range from -120 km to 6000 km: (1) The intensity of the continuous emission ...
Tópico(s): Astro and Planetary Science
1955 - Institute of Physics | The Astrophysical Journal Supplement Series
Jean-Claude Pecker, Walter Orr Roberts,
A qualitative hypothesis is given that attributes recurrent “M-region” geomagnetic disturbances to the arrival at the earth of solar corpuscles that have been gathered into beams by the deflecting action of coronal-region fields, presumably magnetic, associated with centers of heightened solar activity. The hypothesis identifies the source of solar corpuscles that produces M-region magnetic disturbances with “quiet areas” of the solar surface. A related hypothesis associates non-recurrent magnetic ...
Tópico(s): Astro and Planetary Science
1955 - American Geophysical Union | Journal of Geophysical Research Atmospheres
Socrates knew all that was known by his contemporaries. But already in the Middle Ages it was becoming difficult for a single man to have a truly encyclopedic view of all human knowledge. It is true t
Tópico(s): Astronomical Observations and Instrumentation
1970 - Springer Nature (Netherlands) | Astrophysics and space science library
Jean-Claude Pecker, A.P. Roberts, J. P. Vigier,
Tópico(s): Galaxies: Formation, Evolution, Phenomena
1972 - Nature Portfolio | Nature
Timo Jaakkola, M. Moles, J. P. Vigier, Jean-Claude Pecker, Wolfgang Yourgrau,
Tópico(s): Quantum Mechanics and Applications
1975 - Springer Science+Business Media | Foundations of Physics
P. Mérat, Jean-Claude Pecker, J. P. Vigier, Wolfgang Yourgrau,
Tópico(s): Historical Astronomy and Related Studies
1974 - EDP Sciences | Astronomy and Astrophysics
P. Mérat, Jean-Claude Pecker, J. P. Vigier,
Tópico(s): Solar and Space Plasma Dynamics
1974 - EDP Sciences | Astronomy and Astrophysics
Jean-Claude Pecker, W. Tait, J. P. Vigier,
Tópico(s): Stellar, planetary, and galactic studies
1973 - Nature Portfolio | Nature
S. Dumont, Jean-Claude Pecker, A. Omont,
Tópico(s): Laser-induced spectroscopy and plasma
1973 - Springer Science+Business Media | Solar Physics
D. Depaquit, Jean-Claude Pecker, J. P. Vigier,
Abstract Can observational selection effects, tied with the existence of strong lines, explain the observed log (1 + z ) periodicity of the quasar's histogram, as sometimes claimed? A first approach shows that one must distinguish radio from optical quasars. In the former case spectroscopic selection due to strong lines is investigated from the study of homogeneous samples. Then, the role played by pairs of strong lines in the redshift's determination is evaluated and it shows that teh spectroscopic ...
Tópico(s): Galaxies: Formation, Evolution, Phenomena
1985 - Wiley | Astronomische Nachrichten
Hollis R. Johnson, F. Querci, S. D. Jordan, R. N. Thomas, Leo Goldberg, Jean-Claude Pecker,
The papers in this volume cover the following topics: (1) basic properties and photometric variability of M and related stars; (2) spectroscopy and nonthermal processes; (3) circumstellar radio molecular lines; (4) circumstellar shells, the formation of grains, and radiation transfer; (5) mass loss; (6) circumstellar chemistry; (7) thermal atmospheric models; (8) quasi-thermal models; (9) observations on the atmospheres of M dwarfs; and (1) theoretical work on M dwarfs.
Tópico(s): Astronomy and Astrophysical Research
1987 - National Aeronautics and Space Administration | NASA Special Publication
J. V. Narlikar, Jean-Claude Pecker, J. P. Vigier,
Tópico(s): Cosmology and Gravitation Theories
1991 - Springer Nature | Journal of Astrophysics and Astronomy
Jean-Claude Pecker, S. R. Pottasch,
Tópico(s): Solar and Space Plasma Dynamics
1969 - EDP Sciences | Astronomy and Astrophysics
J. V. Narlikar, Jean-Claude Pecker, J. P. Vigier,
Abstract Assuming a priori the existence of a non-zero photon rest-mass m γ >0 and justifying this assumption, we can predict the existence of an anisotropy in velocity and frequency of light in the direction of the apex of the 3 K background cosmic radiation field. Since this frequency shift can now be tested in the laboratory, it is important to improve the precision of these measurements in order to check our predictions. Its possible confirmation implies indeed the definition of an absolute evolution ...
Tópico(s): Dark Matter and Cosmic Phenomena
1991 - Elsevier BV | Physics Letters A
Jean-Claude Pecker, Walter Orr Roberts,
Tópico(s): Geophysical and Geoelectrical Methods
1954 - American Association for the Advancement of Science | Science
Tópico(s): Astro and Planetary Science
1972 - EDP Sciences | Astronomy and Astrophysics
S. Dumont, A. Omont, Jean-Claude Pecker, D. E. Rees,
Tópico(s): Solid-state spectroscopy and crystallography
1977 - EDP Sciences | Astronomy and Astrophysics
S. Dumont, Z. Mouradian, Jean-Claude Pecker, J. C. Vial, E. G. Chipman,
Tópico(s): Astro and Planetary Science
1983 - Springer Science+Business Media | Solar Physics
My life has been an interesting voyage. I became an astronomer because I could not imagine living on Earth and not trying to understand how the Universe works. My scientific career has revolved around observing the motions of stars within galaxies and the ...Read More
1965 - Annual Reviews | Annual Review of Astronomy and Astrophysics
Jean-Claude Pecker, F. Praderie, R. N. Thomas,
The idea of the stellar atmosphere as a transition zone between the quasi-equilibrium stellar interior and the wholly nonequilibrium interstellar medium is developed. The transition is between a primarily-storage, and a primarily-propagation, configuration for the energy associated with each of the radiation and massfluxes. Each phase of the transition, for the radiative flux, gives rise to one region of the photosphere; for the mass-flux, to one region of the hylosphere. A schematic outline of ...
Tópico(s): Stellar, planetary, and galactic studies
1973 - EDP Sciences | Astronomy and Astrophysics
Jean-Claude Pecker, R. G. Athay,
view Abstract Citations (6) References (11) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS CN Bands in the Chromosphere. Pecker, J. -C. ; Athay, R. G. Abstract CN bands are observed in emission in the chromosphere between the photospheric limb and a height of 750 km. Spectrograms obtained by the High Altitude Observatory at the Khartoum eclipse in 1952 showed a scale height of 210 km for the intensity of the emission in the 2 2 (0, 0) band at X 3883. The emission spectrum ...
Tópico(s): Atmospheric Ozone and Climate
1955 - IOP Publishing | The Astrophysical Journal
Jean-Claude Pecker, Elizabeth Ribes, H. B. Snodgrass,
... and Permissions Cite Icon Cite Search Site Citation Jean‐Claude Pecker, Elizabeth Ribes, Herschel B. Snodgrass; The Different Circles ...
Tópico(s): Geological and Geophysical Studies
1989 - AIP Publishing | Physics Today
Tópico(s): Advanced Mathematical Theories
1997 - Springer Nature | Journal of Astrophysics and Astronomy
Timo Jaakkola, Hiroshi Karoji, G. Le Denmat, M. Moles, Laurent Nottale, J. P. Vigier, Jean-Claude Pecker,
An attempt is performed to see whether the anisotropic angular distribution of redshifts discovered by Rubin, Ford & Rubin for Sc I galaxies (denoted RFR effect) exists for other types of sources. The data used consists of : (a) brightest cluster galaxies; (b) those for which supernovae serve as distance indicators; (c) Seyfert-type galaxies. The statistical analysis reveals in all three cases a similar anisotropy at intermediate distances as that previously found. A modification of the RFR borderline, ...
Tópico(s): Gamma-ray bursts and supernovae
1976 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
C. Magnan, Jean-Claude Pecker,
Tópico(s): Stellar, planetary, and galactic studies
1974 - Cambridge University Press | Highlights of Astronomy
Tópico(s): Free Radicals and Antioxidants
1963 - Springer Science+Business Media | Space Science Reviews
Tópico(s): Historical and Literary Studies
1984 - Éditions de l'EHESS | Archives de sciences sociales des religions
L. V. Kuhi, Jean-Claude Pecker, J. P. Vigier,
Tópico(s): Astrophysics and Star Formation Studies
1974 - EDP Sciences | Astronomy and Astrophysics
Z. Mouradian, S. Dumont, Jean-Claude Pecker, E. G. Chipman, G. Artzner, J. C. Vial,
Tópico(s): Stellar, planetary, and galactic studies
1982 - Springer Science+Business Media | Solar Physics