Claude Carignan | University of Cape Town (original) (raw)

Papers by Claude Carignan

Research paper thumbnail of Computer Aided Method for the Design of Two Stage Optical Systems

Optik - International Journal for Light and Electron Optics, 2015

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Research paper thumbnail of MIGHTEE-\HI: Possible interactions with the galaxy NGC~895

arXiv (Cornell University), Mar 16, 2023

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Research paper thumbnail of Unique Tracks Drive the Scatter of the Spatially Resolved Star Formation Main Sequence

The Astrophysical Journal, 2018

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Research paper thumbnail of Environmental Effects on the Kinematics of Virgo Cluster Galaxies

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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Research paper thumbnail of H i Kinematics and Mass Distribution of Messier 33

The Astronomical Journal, 2017

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Research paper thumbnail of Distribution de la matiere sombre dans les galaxies spirales

ABSTRACT

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Research paper thumbnail of TWINNING between Institutions in developed and less developed countries: an ideal way to set-up an astrophysics program

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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Research paper thumbnail of Deep wide field HI imaging of Messier 31

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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Research paper thumbnail of Improved 3D Fabry–Perot data reduction techniques*

Monthly Notices of the Royal Astronomical Society, 2006

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Research paper thumbnail of The Compact Group of Galaxies HCG 31 in an Early Phase of Merging

The Astrophysical Journal, 2004

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Research paper thumbnail of Accepted for publication in The Astrophysical Journal Preprint typeset using L ATEX style emulateapj v. 03/07/07 Hi KINEMATICS AND DYNAMICS OF MESSIER 31 1

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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Research paper thumbnail of NEW Hi STRUCTURES IN MESSIER 33 UNVEILED BY A MULTIPLE PEAK ANALYSIS OF HIGH-RESOLUTION 21-CM DATA

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Research paper thumbnail of Local Universe Dwarf Galaxies

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Research paper thumbnail of Web-based Teaching Radio Interferometer for Africa

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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Research paper thumbnail of <title>FaNTOmM: Fabry Perot of New Technology for the Observatoire du mont Megantic</title>

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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Research paper thumbnail of Positions and Flux Densities at 5000 MHz for 1133 Weak Radio Sources

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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Research paper thumbnail of GHASP: A 3-D Survey of Spiral and Irregular Galaxies at Hα

The Evolution of Galaxies, 2002

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Research paper thumbnail of Engineering and science highlights of the KAT-7 radio telescope

Monthly Notices of the Royal Astronomical Society, 2016

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Research paper thumbnail of The hot, warm and cold gas in Arp 227 - an evolving poor group

Monthly Notices of the Royal Astronomical Society, 2006

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Research paper thumbnail of Towards a Full Census of the Obscure(d) Vela Supercluster using MeerKAT

Cornell University - arXiv, Aug 11, 2017

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Research paper thumbnail of Computer Aided Method for the Design of Two Stage Optical Systems

Optik - International Journal for Light and Electron Optics, 2015

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Research paper thumbnail of MIGHTEE-\HI: Possible interactions with the galaxy NGC~895

arXiv (Cornell University), Mar 16, 2023

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Research paper thumbnail of Unique Tracks Drive the Scatter of the Spatially Resolved Star Formation Main Sequence

The Astrophysical Journal, 2018

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Research paper thumbnail of Environmental Effects on the Kinematics of Virgo Cluster Galaxies

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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Research paper thumbnail of H i Kinematics and Mass Distribution of Messier 33

The Astronomical Journal, 2017

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Research paper thumbnail of Distribution de la matiere sombre dans les galaxies spirales

ABSTRACT

Bookmarks Related papers MentionsView impact

Research paper thumbnail of TWINNING between Institutions in developed and less developed countries: an ideal way to set-up an astrophysics program

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.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Deep wide field HI imaging of Messier 31

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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Research paper thumbnail of Improved 3D Fabry–Perot data reduction techniques*

Monthly Notices of the Royal Astronomical Society, 2006

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The Compact Group of Galaxies HCG 31 in an Early Phase of Merging

The Astrophysical Journal, 2004

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Accepted for publication in The Astrophysical Journal Preprint typeset using L ATEX style emulateapj v. 03/07/07 Hi KINEMATICS AND DYNAMICS OF MESSIER 31 1

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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Research paper thumbnail of NEW Hi STRUCTURES IN MESSIER 33 UNVEILED BY A MULTIPLE PEAK ANALYSIS OF HIGH-RESOLUTION 21-CM DATA

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Local Universe Dwarf Galaxies

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Web-based Teaching Radio Interferometer for Africa

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

Research paper thumbnail of <title>FaNTOmM: Fabry Perot of New Technology for the Observatoire du mont Megantic</title>

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

Research paper thumbnail of Positions and Flux Densities at 5000 MHz for 1133 Weak Radio Sources

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.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of GHASP: A 3-D Survey of Spiral and Irregular Galaxies at Hα

The Evolution of Galaxies, 2002

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Research paper thumbnail of Engineering and science highlights of the KAT-7 radio telescope

Monthly Notices of the Royal Astronomical Society, 2016

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Research paper thumbnail of The hot, warm and cold gas in Arp 227 - an evolving poor group

Monthly Notices of the Royal Astronomical Society, 2006

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Towards a Full Census of the Obscure(d) Vela Supercluster using MeerKAT

Cornell University - arXiv, Aug 11, 2017

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