The Canada–France Imaging Survey: First Results from the u-Band Component - Archive ouverte HAL
Article Dans Une Revue The Astrophysical journal letters Année : 2017

The Canada–France Imaging Survey: First Results from the u-Band Component

Rodrigo Ibata
Nicolas Martin
Scott Scott
  • Fonction : Auteur
Benoît Famaey
Stephen Gwyn
Vanessa Hill
Michael J. Hudson
  • Fonction : Auteur
  • PersonId : 828627
Ariane Lançon
Khyati Malhan
Sandrine Pires
  • Fonction : Auteur
  • PersonId : 980620
Marcin Sawicki
Douglas Scott
Kim Venn

Résumé

The Canada-France Imaging Survey (CFIS) will map the northern high Galactic latitude sky in the uband ("CFIS-u", 10,000 deg 2) and in the r-band ("CFIS-r", 5,000 deg 2), enabling a host of stand-alone science investigations, and providing some of the ground-based data necessary for photometric redshift determination for the Euclid mission. In this first contribution we present the u-band component of the survey, describe the observational strategy, and discuss some first highlight results, based on approximately one third of the final area. We show that the Galactic anticenter structure is distributed continuously along the line of sight, out to beyond 20 kpc, and possesses a metallicity distribution that is essentially identical to that of the outer disk sampled by APOGEE. This suggests that it is probably a buckled disk of old metal-rich stars, rather than a stream or a flare. We also discuss the future potential for CFIS-u in discovering star-forming dwarf galaxies around the Local Group, the characterization of the white dwarf and blue straggler population of the Milky Way, as well as its sensitivity to low-surface brightness structures in external galaxies.
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Dates et versions

hal-01714623 , version 1 (08-12-2020)

Identifiants

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Rodrigo Ibata, Alan Mcconnachie, Jean-Charles Cuillandre, Nicholas Fantin, Misha Haywood, et al.. The Canada–France Imaging Survey: First Results from the u-Band Component. The Astrophysical journal letters, 2017, 848 (2), pp.128. ⟨10.3847/1538-4357/aa855c⟩. ⟨hal-01714623⟩
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