WIRCam: the infrared wide-field camera for the Canada-France-Hawaii Telescope

Puget, P.; Stadler, Eric; Doyon, René; Gigan, P.; Thibault, Simon; Barrick, Gregory; Benedict, Tom; Forveille, T.; Rambold, William; Thomas, Jim; Vermeulen, Tom; Ward, Jeff; Beuzit, Jean-Luc; Feautrier, Philippe; Magnard, Y.; Mella, Guillaume; Preis, Olivier; Vallée, Philippe; Wang, Shiang‐Yu; Lin, Chueh-Jen; Hall, Donald N. B.; Hodapp, Klaus W.

doi:10.1117/12.551097

Cited by 128 publications

(35 citation statements)

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“…The deep near-IR imagery of a dozen Galactic PNe was carried out using the Wide-field InfraRed Camera (WIRCam; Puget et al 2004) on the 3.6 m CFHT in 2012 August (program ID 12AS98). The wide-field imager WIRCam is composed of four HAWAII2-RG detectors (each 2048× 2048 pixels) and covers a total field of view (FoV) of 20′×20′ with a pixel scale of 0 3.…”

Section: Cfht Near-ir Observationsmentioning

confidence: 99%

Extended Structures of Planetary Nebulae Detected in H₂ Emission^∗

Fang

Zhang

Kwok

et al. 2018

ApJ

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We present narrowband near-infrared images of a sample of 11 Galactic planetary nebulae (PNe) obtained in the H 2 2.122 μm and Brγ 2.166 μm emission lines and the K c 2.218 μm continuum. These images were collected with the Wide-field Infrared Camera on the 3.6 m Canada-France-Hawaii Telescope (CFHT); their unprecedented depth and wide field of view allow us to find extended nebular structures in H 2 emission in several PNe, some of these being the first detection. The nebular morphologies in H 2 emission are studied in analogy with the optical images, and indication of stellar wind interactions is discussed. In particular, the complete structure of the highly asymmetric halo in NGC 6772 is witnessed in H 2 , which strongly suggests interaction with the interstellar medium. Our sample confirms the general correlation between H 2 emission and the bipolarity of PNe. The knotty or filamentary fine structures of the H 2 gas are resolved in the inner regions of several ring-like PNe, also confirming the previous argument that H 2 emission mostly comes from knots or clumps embedded within fully ionized material at the equatorial regions. Moreover, the H 2 image of the butterfly-shaped Sh 1-89, after removal of field stars, clearly reveals a tilted ring structure at the waist. These high-quality CFHT images justify follow-up detailed morphokinematic studies that are desired in order to deduce the true physical structures of a few PNe in the sample.

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Section: Cfht Near-ir Observationsmentioning

confidence: 99%

Extended Structures of Planetary Nebulae Detected in H₂ Emission^∗

Fang

Zhang

Kwok

et al. 2018

ApJ

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“…We obtain the H 2 image taken with the Wide-field Infrared Camera (WIRCAM, Puget et al 2004) on the 3.6-m Canada France Hawaii Telescope (CFHT) from the Canadian Astronomy Data Centre (CADC). The observations were done on 2006 April 14 (PI: S. Kwok, Prop.…”

Section: Physical Conditions: Spatial Distributionmentioning

confidence: 99%

The Herschel Planetary Nebula Survey (HerPlaNS): A Comprehensive Dusty Photoionization Model of NGC6781

Otsuka

Ueta

Hoof

et al. 2017

ApJS

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We perform a comprehensive analysis of the planetary nebula (PN) NGC 6781 to investigate the physical conditions of each of its ionized, atomic, and molecular gas and dust components and the object's evolution, based on panchromatic observational data ranging from UV to radio. Empirical nebular elemental abundances, compared with theoretical predictions via nucleosynthesis models of asymptotic giant branch (AGB) stars, indicate that the progenitor is a solar-metallicity, 2.25 − 3.0 M ⊙ initial-mass star. We derive the best-fit distance of 0.46 kpc by fitting the stellar luminosity (as a function of the distance and effective temperature of the central star) with the adopted post-AGB evolutionary tracks. Our excitation energy diagram analysis indicate high excitation temperatures in the photodissociation region (PDR) beyond the ionized part of the nebula, suggesting extra heating by shock interactions between the slow AGB wind and the fast PN wind. Through iterative fitting using the Cloudy code with empirically-derived constraints, we find the best-fit dusty photoionization model of the object that would inclusively reproduce all of the adopted panchromatic observational data. The estimated total gas mass (0.41 M ⊙ ) corresponds to the mass ejected during the last AGB thermal pulse event predicted for a 2.5 M ⊙ initial-mass star. A significant fraction of the total mass (about 70 %) is found to exist in the PDR, demonstrating the critical importance of the PDR in PNe that are generally recognized as the hallmark of ionized/H

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“…During the last ten years, major advances have been made in the quest of the first galaxies in our universe, thanks to the commissioning of new facilities such as the WFC3/Hubble Space Telescope (HST) (Windhorst et al 2011), WIRCam/CFHT (Puget et al 2004), MOSFIRE/Keck (McLean et al 2012) or X-Shooter/VLT (Vernet et al 2011), and the arrival of extremely deep surveys, e.g., the Hubble Ultra Deep Field (Beckwith et al 2006), the Cluster Lensing And Supernova survey with Hubble (CLASH- Postman et al 2012), or the Brightest of Reionizing Galaxies Survey (BoRG- Trenti et al 2011). Among all the results achieved, one can mention the great leap forward in the number of  z 6.5 sources known that count in several hundreds atz 7 Oesch et al 2010c;Schenker et al 2013), hundreds atz 8 (Bradley et al 2012;Yan et al 2012;Labbé et al 2013) and dozens at  z 8.5 Oesch et al 2014), with the most distant spectroscopically confirmed galaxy at z = 8.68 (Zitrin et al 2015b) and the highest photometrically selected galaxy atz 11 (Coe et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Young Galaxy Candidates in the Hubble Frontier Fields. Iii. MACS J0717.5+3745

Laporte

Infante

Troncoso-Iribarren

et al. 2016

ApJ

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In this paper we present the results of our search for and study of z 6 galaxy candidates behind the third Frontier Fields (FF) cluster, MACSJ0717.5+3745, and its parallel field, combining data from Hubble and Spitzer. We select 39 candidates using the Lyman Break technique, for which the clear non-detection in optical make the extreme mid-z interlopers hypothesis unlikely. We also take benefit from z 6 samples selected using previous Frontier Fields datasets of Abell 2744 and MACS0416 to improve the constraints on the properties of very high-redshift objects. We compute the redshift and the physical properties, such emission lines properties, star formation rate, reddening, and stellar mass for all Frontier Fields objects from their spectral energy distribution using templates including nebular emission lines. We study the relationship between several physical properties and confirm the trend already observed in previous surveys for evolution of star formation rate with galaxy mass, and between the size and the UV luminosity of our candidates. The analysis of the evolution of the UV Luminosity Function with redshift seems more compatible with an evolution of density. Moreover, no robust z ≥8.5 object is selected behind the cluster field, and few z∼9 candidates have been selected in the two previous datasets from this legacy survey, suggesting a strong evolution in the number density of galaxies between z∼8 and 9. Thanks to the use of the lensing cluster, we study the evolution of the star formation rate density produced by galaxies with L>0.03L , and confirm the strong decrease observed between z∼8 and 9.

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WIRCam: the infrared wide-field camera for the Canada-France-Hawaii Telescope

Cited by 128 publications

References 1 publication

Extended Structures of Planetary Nebulae Detected in H₂ Emission^∗

Extended Structures of Planetary Nebulae Detected in H₂ Emission^∗

The Herschel Planetary Nebula Survey (HerPlaNS): A Comprehensive Dusty Photoionization Model of NGC6781

Young Galaxy Candidates in the Hubble Frontier Fields. Iii. MACS J0717.5+3745

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WIRCam: the infrared wide-field camera for the Canada-France-Hawaii Telescope

Cited by 128 publications

References 1 publication

Extended Structures of Planetary Nebulae Detected in H2 Emission∗

Extended Structures of Planetary Nebulae Detected in H2 Emission∗

The Herschel Planetary Nebula Survey (HerPlaNS): A Comprehensive Dusty Photoionization Model of NGC6781

Young Galaxy Candidates in the Hubble Frontier Fields. Iii. MACS J0717.5+3745

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Extended Structures of Planetary Nebulae Detected in H₂ Emission^∗

Extended Structures of Planetary Nebulae Detected in H₂ Emission^∗