Zobrazeno 1 - 10
of 64
pro vyhledávání: '"C. Foellmi"'
Autor:
C. Foellmi
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2009, 507, pp.1719. ⟨10.1051/0004-6361/200911739⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2009, 507, pp.1719. ⟨10.1051/0004-6361/200911739⟩
Most observational techniques in astronomy can be understood as exploiting the various forms of the first-order correlation function g^(1). As however demonstrated by the Narrabri Stellar Intensity Interferometer back in the 1960's by Hanbury Brown &
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::431bbca3f934152ef18d7d33fa407519
https://doi.org/10.1051/0004-6361/200911739
https://doi.org/10.1051/0004-6361/200911739
Publikováno v:
Astronomical Journal
Astronomical Journal, American Astronomical Society, 2009, 137 (4), pp.3859-3863. ⟨10.1088/0004-6256/137/4/3859⟩
The Astronomical Journal
The Astronomical Journal, American Astronomical Society, 2009, 137 (4), pp.3859-3863. ⟨10.1088/0004-6256/137/4/3859⟩
Astronomical Journal, American Astronomical Society, 2009, 137 (4), pp.3859-3863. ⟨10.1088/0004-6256/137/4/3859⟩
The Astronomical Journal
The Astronomical Journal, American Astronomical Society, 2009, 137 (4), pp.3859-3863. ⟨10.1088/0004-6256/137/4/3859⟩
International audience; We performed high spectral resolution observations of Mercury's exosphere on 2005 October 30 and 31 using the European Southern Observatory-New Technology Telescope, La Silla, Chile. The large spectral range, 385-855 nm, of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a89347b8795d262f8ad327678639fa0d
https://doi.org/10.1088/0004-6256/137/4/3859
https://doi.org/10.1088/0004-6256/137/4/3859
Autor:
C. Foellmi
Publikováno v:
EAS Publications Series. 37:279-283
True photon-counting devices in the optical may open a new observationnal window in astrophysics: photon statistics and quamtum properties of light. We rapidly develop below the scientific context and the mathematical basis to understand photon stati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e2e734070567ec09385e934cc4089a00
https://doi.org/10.1051/eas/0937034
https://doi.org/10.1051/eas/0937034
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2006, 447, pp.667-680. ⟨10.1051/0004-6361:20054063⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2006, 447, pp.667-680. ⟨10.1051/0004-6361:20054063⟩
International audience; BAT99-129 in the LMC is one among a handful of extra-galactic eclipsing Wolf-Rayet binaries known. We present blue, medium-resolution, phase-dependent NTT-EMMI spectra of this system that allow us to separate the spectra of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::20134ef4fe166e744669b6767f528226
https://doi.org/10.1051/0004-6361:20054063
https://doi.org/10.1051/0004-6361:20054063
Autor:
P. Francois, Jean Schneider, C. Foellmi, D. Briot, S. Hamdani, Pierre Riaud, L. Arnold, Jérôme Berthier
Publikováno v:
IAU Colloq. 200: Direct Imaging of Exoplanets: Science & Techniques
IAU Colloq. 200: Direct Imaging of Exoplanets: Science & Techniques, Oct 2005, Nice, France, France. pp.83-88, ⟨10.1017/S1743921306009136⟩
IAU Colloq. 200: Direct Imaging of Exoplanets: Science & Techniques, Oct 2005, Nice, France, France. pp.83-88, ⟨10.1017/S1743921306009136⟩
We report 320 to 1020nm disk-averaged Earth reflectance spectra obtained from Moon's Earthshine observations with the EMMI spectrograph on the NTT at ESO La Silla (Chile). The spectral signatures of Earth atmosphere and ground vegetation are observed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a7b841dccf8028b7f9ea95f0a685e7c
https://doi.org/10.1017/s1743921306009136
https://doi.org/10.1017/s1743921306009136
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 338:1025-1056
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a29523922f0171f5a5560bfcf5564d46
https://doi.org/10.1046/j.1365-8711.2003.06161.x
https://doi.org/10.1046/j.1365-8711.2003.06161.x
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 338:360-388
We have carried out an intensive spectroscopic campaign to search for binaries via periodic radial velocity (RV) variations among all the nitrogen-rich WN Wolf‐Rayet (WR) stars in the Small Magellanic Cloud (SMC), and all WNE stars in the Large Mag
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff63a5fbde2d1c2ed6098a2dea78b67a
https://doi.org/10.1046/j.1365-8711.2003.06052.x
https://doi.org/10.1046/j.1365-8711.2003.06052.x
Autor:
C. Foellmi, A. Liermann, Lidia M. Oskinova, U. Rühling, Götz Gräfener, O. Schnurr, H. Todt, Rainer Hainich, Wolf-Rainer Hamann
Aims: Following our comprehensive studies of the WR stars in the Milky Way, we now present spectroscopic analyses of almost all known WN stars in the LMC. Methods: For the quantitative analysis of the wind-dominated emission-line spectra, we employ t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb7b57961e0a088d4ca9c7a61463cbbc
https://publishup.uni-potsdam.de/frontdoor/index/index/docId/37890
https://publishup.uni-potsdam.de/frontdoor/index/index/docId/37890
Autor:
A. F. J. Moffat, C. Foellmi, D. Ballereau, Juan Zorec, Nicole St-Louis, S. V. Marchenko, J. Chauville, Charles A. Poteet, André-Nicolas Chené
Publikováno v:
Astronomy & Astrophysics
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Aims. What is the origin of the large-amplitude variability in Wolf-Rayet WN8 stars in general and WR123 in particular? A dedicated spectroscopic campaign targets the ten-hour period previously found in the high-precision photometric data obtained by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f48f6be2c1602b619fed05cb03855614
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2010, 522, pp.A38
Astronomy and Astrophysics-A&A, EDP Sciences, 2010, 522, pp.A38
The interpretation of the X-ray spectra of X-ray binaries during their hard states requires a hot, optically thin medium. There are several accretion disc models in the literature that account for this aspect. However, none is designed to simultaneou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::140d5d921dd68881c3adbc2fdf23e11d
https://hal.archives-ouvertes.fr/hal-00631981
https://hal.archives-ouvertes.fr/hal-00631981