Claude Carignan | University of Cape Town (original) (raw)
Papers by Claude Carignan
Optik - International Journal for Light and Electron Optics, 2015
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arXiv (Cornell University), Mar 16, 2023
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The Astrophysical Journal, 2018
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Symposium - International Astronomical Union, 2004
We present results from an ongoing survey of the ionized gas kinematics in Virgo cluster spiral g... more We present results from an ongoing survey of the ionized gas kinematics in Virgo cluster spiral galaxies using Fabry-Perot (FP) interferometry. Our goal is to study the environmental effects on galaxy evolution in the Virgo cluster. We report here on the Hα distribution map and velocity field of NGC 4438, an interacting galaxy near the centre of the cluster.
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The Astronomical Journal, 2017
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ABSTRACT
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Proceedings of the International Astronomical Union, 2012
It is very difficult to start from scratch a new Astrophysics program in a country with very litt... more It is very difficult to start from scratch a new Astrophysics program in a country with very little or no researchers in the field. In 2007, we began to set-up an Astrophysics program by TWINNING the Université de Ouagadougou with the Université de Montréal in Canada, the Université de Provence in France and the University of Cape Town in South Africa. Already, courses are given at the undergraduate and Master levels and a teaching Observatory has been built. A 1m research telescope was also moved from the La Silla Observatory in Chile to Burkina Faso and the infrastructure is being built at the moment on mount Djaogari in the north-eastern part of the country. In the meantime, 6 students are doing their PhD in Astrophysics overseas (Canada, France and South Africa) and will become the core of the research group at the Université de Ouagadougou. An engineer is also doing his PhD in Astronomical Instrumentation to help with the maintenance of the equipment on the Research Telescope.
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We report on preliminary results from a new deep 21-cm survey of the Andromeda galaxy, based on o... more We report on preliminary results from a new deep 21-cm survey of the Andromeda galaxy, based on observations performed with the Synthesis Telescope and the 26-m antenna at DRAO. The HI distribution and kinematics of the disc are analyzed and basic dynamical properties are derived. New HI structures are discovered, like thin HI spur-like structures and an external arm in the disc outskirts. The HI spurs are related to perturbed stellar clumps outside the main disc of M31. The external arm lies on the far, receding side of the galaxy and has no obvious counterpart in the opposite side. These HI perturbations probably result from tidal interactions with companions. It is found a dynamical mass of 4.7 +/- 0.5 x10^11 Msol enclosed within a radius R = 38 kpc and a total mass of ~1 x10^12 Msol inside the virial radius. Comment: 4 pages, 1 figure, proceeding of the conference "Panoramic Radio Astronomy: Wide-field 1-2 GHz research on galaxy evolution", June 02 - 05 2009, Groningen
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Monthly Notices of the Royal Astronomical Society, 2006
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The Astrophysical Journal, 2004
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We present a new deep 21-cm survey of the Andromeda galaxy, based on high resolution observations... more We present a new deep 21-cm survey of the Andromeda galaxy, based on high resolution observations performed with the Synthesis Telescope and the 26-m antenna at DRAO. The Hi distribution and kinematics of the disc are analyzed and basic dynamical properties are given. The rotation curve is measured out to 38 kpc, showing a nuclear peak at 340 km s −1, a dip at 202 km s −1 around 4 kpc, two distinct flat parts at 264 km s −1 and 230 km s −1 and an increase to 275 km s −1 in the outermost regions. Except for the innermost regions, the axisymmetry of the gas rotation is very good. A very strong warp of the Hi disc is evidenced. The central regions appear less inclined than the average disc inclination of 74 ◦ , while the outer regions appear more inclined. Mass distribution models by ΛCDM Navarro-Frenk-White, Einasto or pseudo-isothermal dark matter halos with baryonic components are presented. They fail to reproduce the exact shape of the rotation curve. No significant differences are...
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Proceedings of the International Astronomical Union, 2015
This presentation describes the web-based Teaching Radio Interferometer being built on the campus... more This presentation describes the web-based Teaching Radio Interferometer being built on the campus of the University of Cape Town, in South Africa, to train the future users of the African VLBI (Very Long Baseline Interferometry) Network (AVN).
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Instrument Design and Performance for Optical/Infrared Ground-based Telescopes, 2003
We present a third generation instrument using a photon counting camera (IPCS) based on an GaAs p... more We present a third generation instrument using a photon counting camera (IPCS) based on an GaAs photo cathode that can achieve quantum efficiency up to 28%, comparable to a thick CCD, but without readout noise. This system is 10 times more sensitive at the Halpha wavelength than previous Fabry Perot system used at the Observatoire du mont Mégantic. In terms
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Australian Journal of Physics, 1981
Flux densities and positions have been measured at 5000 MHz for all the radio sources in the Park... more Flux densities and positions have been measured at 5000 MHz for all the radio sources in the Parkes 2700 MHz catalogue with S2700 = 0�25 Jy for which no 5000 MHz data have previously been published. The new positions of the sources, which are of considerably higher accuracy than those measured at 2700 MHz, have been examined on the available sky survey material: 17 previously suggested identifications are rejected, but alternative identifications are proposed for 4 of these; identifications are proposed for \18 other sources.
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The Evolution of Galaxies, 2002
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Monthly Notices of the Royal Astronomical Society, 2016
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Monthly Notices of the Royal Astronomical Society, 2006
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Cornell University - arXiv, Aug 11, 2017
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Optik - International Journal for Light and Electron Optics, 2015
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arXiv (Cornell University), Mar 16, 2023
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The Astrophysical Journal, 2018
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Symposium - International Astronomical Union, 2004
We present results from an ongoing survey of the ionized gas kinematics in Virgo cluster spiral g... more We present results from an ongoing survey of the ionized gas kinematics in Virgo cluster spiral galaxies using Fabry-Perot (FP) interferometry. Our goal is to study the environmental effects on galaxy evolution in the Virgo cluster. We report here on the Hα distribution map and velocity field of NGC 4438, an interacting galaxy near the centre of the cluster.
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The Astronomical Journal, 2017
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ABSTRACT
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Proceedings of the International Astronomical Union, 2012
It is very difficult to start from scratch a new Astrophysics program in a country with very litt... more It is very difficult to start from scratch a new Astrophysics program in a country with very little or no researchers in the field. In 2007, we began to set-up an Astrophysics program by TWINNING the Université de Ouagadougou with the Université de Montréal in Canada, the Université de Provence in France and the University of Cape Town in South Africa. Already, courses are given at the undergraduate and Master levels and a teaching Observatory has been built. A 1m research telescope was also moved from the La Silla Observatory in Chile to Burkina Faso and the infrastructure is being built at the moment on mount Djaogari in the north-eastern part of the country. In the meantime, 6 students are doing their PhD in Astrophysics overseas (Canada, France and South Africa) and will become the core of the research group at the Université de Ouagadougou. An engineer is also doing his PhD in Astronomical Instrumentation to help with the maintenance of the equipment on the Research Telescope.
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We report on preliminary results from a new deep 21-cm survey of the Andromeda galaxy, based on o... more We report on preliminary results from a new deep 21-cm survey of the Andromeda galaxy, based on observations performed with the Synthesis Telescope and the 26-m antenna at DRAO. The HI distribution and kinematics of the disc are analyzed and basic dynamical properties are derived. New HI structures are discovered, like thin HI spur-like structures and an external arm in the disc outskirts. The HI spurs are related to perturbed stellar clumps outside the main disc of M31. The external arm lies on the far, receding side of the galaxy and has no obvious counterpart in the opposite side. These HI perturbations probably result from tidal interactions with companions. It is found a dynamical mass of 4.7 +/- 0.5 x10^11 Msol enclosed within a radius R = 38 kpc and a total mass of ~1 x10^12 Msol inside the virial radius. Comment: 4 pages, 1 figure, proceeding of the conference "Panoramic Radio Astronomy: Wide-field 1-2 GHz research on galaxy evolution", June 02 - 05 2009, Groningen
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Monthly Notices of the Royal Astronomical Society, 2006
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The Astrophysical Journal, 2004
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We present a new deep 21-cm survey of the Andromeda galaxy, based on high resolution observations... more We present a new deep 21-cm survey of the Andromeda galaxy, based on high resolution observations performed with the Synthesis Telescope and the 26-m antenna at DRAO. The Hi distribution and kinematics of the disc are analyzed and basic dynamical properties are given. The rotation curve is measured out to 38 kpc, showing a nuclear peak at 340 km s −1, a dip at 202 km s −1 around 4 kpc, two distinct flat parts at 264 km s −1 and 230 km s −1 and an increase to 275 km s −1 in the outermost regions. Except for the innermost regions, the axisymmetry of the gas rotation is very good. A very strong warp of the Hi disc is evidenced. The central regions appear less inclined than the average disc inclination of 74 ◦ , while the outer regions appear more inclined. Mass distribution models by ΛCDM Navarro-Frenk-White, Einasto or pseudo-isothermal dark matter halos with baryonic components are presented. They fail to reproduce the exact shape of the rotation curve. No significant differences are...
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Bookmarks Related papers MentionsView impact
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Proceedings of the International Astronomical Union, 2015
This presentation describes the web-based Teaching Radio Interferometer being built on the campus... more This presentation describes the web-based Teaching Radio Interferometer being built on the campus of the University of Cape Town, in South Africa, to train the future users of the African VLBI (Very Long Baseline Interferometry) Network (AVN).
Bookmarks Related papers MentionsView impact
Instrument Design and Performance for Optical/Infrared Ground-based Telescopes, 2003
We present a third generation instrument using a photon counting camera (IPCS) based on an GaAs p... more We present a third generation instrument using a photon counting camera (IPCS) based on an GaAs photo cathode that can achieve quantum efficiency up to 28%, comparable to a thick CCD, but without readout noise. This system is 10 times more sensitive at the Halpha wavelength than previous Fabry Perot system used at the Observatoire du mont Mégantic. In terms
Bookmarks Related papers MentionsView impact
Australian Journal of Physics, 1981
Flux densities and positions have been measured at 5000 MHz for all the radio sources in the Park... more Flux densities and positions have been measured at 5000 MHz for all the radio sources in the Parkes 2700 MHz catalogue with S2700 = 0�25 Jy for which no 5000 MHz data have previously been published. The new positions of the sources, which are of considerably higher accuracy than those measured at 2700 MHz, have been examined on the available sky survey material: 17 previously suggested identifications are rejected, but alternative identifications are proposed for 4 of these; identifications are proposed for \18 other sources.
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The Evolution of Galaxies, 2002
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Monthly Notices of the Royal Astronomical Society, 2016
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Monthly Notices of the Royal Astronomical Society, 2006
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Cornell University - arXiv, Aug 11, 2017
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