55 citations · 107 across the 21 of their papers we have counts for
21 papers
Some polarized lines of the second solar spectrum (SrI, CaI, BaII, C2, MgH, NdII) observed at the Meudon Solar Tower spectropolarimeter
Jean-Marie Malherbe
The second solar spectrum is the spectrum of the Stokes parameter Q (linear polarization) close to the solar limb. It is made of a few polarized lines with Q/I of about 1% (such as…
Polarized lines of the second solar spectrum (SrI, SrII, CaI, BaII) observed at the Pic du Midi Turret Dome spectropolarimeter with the slit orthogonal to the limb
Jean-Marie Malherbe
The second solar spectrum is the spectrum of the Stokes parameter Q (linear polarization) close to the solar limb. It differs significantly of the usual intensity spectrum (Stokes…
Weak polarized lines of the second solar spectrum (Na, Al, H, He, Ti, Li, Sc, C2 and MgH) observed at the Pic du Midi turret dome
Jean-Marie Malherbe
The second solar spectrum is the solar spectrum of Stokes parameter Q observed in linear polarization close to the solar limb. It differs significantly of the usual intensity spect…
70 years of spectroscopy of the photosphere and the solar chromosphere at the Pic du Midi Observatory (1956-2026)
Jean-Marie Malherbe
Observations of the solar corona at the Pic du Midi began with Bernard Lyot and his spectro coronagraph installed on the multi-purpose equatorial mount of the Baillaud cupola. It w…
150 years of ground-based solar instrumentation at Meudon observatory (1876-2026)
Jean-Marie Malherbe
The Sun has been observed through a telescope for four centuries. However, its study made a prodigious leap at the end of the nineteenth century with the appearance of photography…
The Paris Meudon ground based support to the NASA Solar Maximum Mission in the eighties
Jean-Marie Malherbe
The Solar Maximum Mission of NASA was one of the first satellites with on board digitization of observations. It was launched for the solar maximum of cycle 21 (1980) in order to s…
Hidden magnetic fields of the quiet Sun derived from Hanle depolarization of lines of the "second solar spectrum" at the limb from Pic du Midi observations
Jean-Marie Malherbe
This paper is based on a dataset of many strongly polarized solar lines belonging to the ''second solar spectrum'', i.e. the spectrum near the limb in linear scattering polarizatio…
High polarization lines of the second solar spectrum of the Solar limb
Jean-Marie Malherbe
We present a dataset of high resolution spectra of the Sun of many strongly polarized lines belonging to the second solar spectrum, i.e. the spectrum near the limb in linear polari…
The golden age of solar magnetography at Paris-Meudon observatory in the second half of the twentieth century
Jean-Marie Malherbe
This paper describes advances in solar magnetography and developments in instrumental techniques of polarimetry and spectroscopy made at Paris-Meudon observatory in the second half…
The role of Trees of Fragmenting Granules (TFG) in the formation of the solar supergranular pattern from Hinode observations
Jean-Marie Malherbe, Thierry Roudier
We present in this paper an exceptional scientific dataset allowing to investigate the structure and evolution of the interior of solar supergranulation cells. Trees of Fragmenting…
High resolution spectra of the [6297-6303] and [6361-6367] Angstr{ö}m domains (including forbidden OI lines) of the Sun and brightest stars
Jean-Marie Malherbe
We present a dataset of high resolution spectra of the Sun and ten bright stars of the domains [6297-6303] and [6361-6367] Angtr{ö}m. Solar spectra were obtained in the quiet Sun a…
The foundation of "Saint V{é}ran-Paul Felenbok" astronomical observatory
Jean-Marie Malherbe
This paper is dedicated to the memory of Paul Felenbok (1936-2020) who was astronomer at Paris-Meudon observatory, and founded in 1974, fifty years ago, a high altitude station (29…
A compilation of solar atlases (from Delbouille, Kurucz, Gandorfer, Stenflo) at disk centre and at limb from 3000 Å to 8800 Å
Jean-Marie Malherbe
We present in this paper a compilation of solar atlases from 3000 Å to 8800 Å with spectral lines identified by the Moore table and with the corresponding equivalent Lande…
The quadruple spectroheliograph of Meudon observatory (1909-1959)
Jean-Marie Malherbe
The spectroheliograph was invented independently by Henri Deslandres (France) and George Hale (USA) in 1892, following the spectroscopic method suggested by Jules Janssen in 1869.…
The Haute Provence monochromatic heliograph (1958-1994)
Jean-Marie Malherbe
Bernard Lyot invented the monochromatic birefringent filter in 1933 in order to investigate the coronal emissions of solar structures above the limb with the coronagraph installed…
In pursuit of the Sun, from Jules Janssen to the present day
Jean-Marie Malherbe
The Sun has been observed through a telescope for four centuries. However, its study made a prodigious leap at the end of the nineteenth century with the appearance of photography…
Capabilities of a 24 -channel slicer for imaging spectroscopy with the Multichannel Subtractive Double Pass (MSDP) on 8-meter class solar spectrographs
Jean-Marie Malherbe
Imaging spectroscopy is intended to be coupled with adaptive optics (AO) on large solar telescopes, in order to produce high spatial and temporal resolution measurements of velocit…
Analysis of full-disc H alpha observations: Carrington maps and filament properties in 1909-2022
Theodosios Chatzistergos, Ilaria Ermolli, Dipankar Banerjee +14
Full disc observations of the Sun in the H line provide information about the solar chromosphere and in particular about the filaments, which are dark and elongated features tha…
Reconstructing solar irradiance from historical Ca II K observations. I. Method and its validation
Theodosios Chatzistergos, Natalie A. Krivova, Ilaria Ermolli +5
Knowledge of solar irradiance variability is critical to Earth's climate models and understanding the solar influence on Earth's climate. Direct solar irradiance measurements are o…
Changes in granulation scales over the solar cycle seen with SDO/HMI and Hinode/SOT
J. Ballot, T. Roudier, J. M. Malherbe +1
The Sun is the only star where the superficial turbulent convection can be observed at very high spatial resolution. The Solar Dynamics Observatory (SDO) has continuously observed…
Analysis of full disc Ca II K spectroheliograms III. Plage area composite series covering 1892-2019
Theodosios Chatzistergos, Ilaria Ermolli, Natalie A. Krivova +16
We derive the plage area evolution over the last 12 solar cycles employing data from all Ca II K archives available publicly in digital form known to us, including several as yet u…