SIGNALS: I. Survey Description

L. Rousseau-Nepton R. P. Martin 1 C. Robert L. Drissen 2 P. Amram 3 S. Prunet 4 T. Martin 5 I. Moumen A. Adamo A. Alarie P. Barmby 6 A. Boselli 3 F. Bresolin M. Bureau 7 L. Chemin 8 R. C. Fernandes F. Combes 9 C. Crowder L. Della Bruna F. Egusa B. Epinat 3 V. F. Ksoll M. Girard V. Gómez Llanos D. Gouliermis K. Grasha C. Higgs J. Hlavacek-Larrondo 10 I. -T. Ho J. Iglesias-Paramo 3 G. Joncas Z. S. Kam P. Karera R. C. Kennicutt 11 R. S. Klessen S. Lianou 12 L. Liu Q. Liu A. Luiz de Amorim J. D. Lyman H. Martel B. Mazzilli-Ciraulo A. F. Mcleod A-L. Melchior 13 I. Millan M. Mollá R. Momose C. Morisset 14 H. -A. Pan A. K. Pati A. Pellerin E. Pellegrini 15 I. Pérez A. Petric H. Plana 16 D. Rahner T. Ruiz Lara L. Sánchez-Menguiano K. Spekkens G. Stasińska 17 M. Takamiya N. Vale Asari J. M. Vílchez 18 L Della bruna S Duarte puertas V Gómez llanos I-T Ho a Luiz De amorim A-L Melchior H-A Pan T Ruiz lara N Vale asari
Abstract : SIGNALS, the Star formation, Ionized Gas, and Nebular Abundances Legacy Survey, is a large observing program designed to investigate massive star formation and HII regions in a sample of local extended galaxies. The program will use the imaging Fourier transform spectrograph SITELLE at the Canada-France-Hawaii Telescope. Over 355 hours (54.7 nights) have been allocated beginning in fall 2018 for eight consecutive semesters. Once completed, SIGNALS will provide a statistically reliable laboratory to investigate massive star formation, including over 50 000 resolved HII regions : the largest, most complete, and homogeneous database of spectroscopically and spatially resolved extragalactic HII regions ever assembled. For each field observed, three datacubes covering the spectral bands of the filters SN1 (363 -386 nm), SN2 (482 - 513 nm), and SN3 (647 - 685 nm) are gathered. The spectral resolution selected for each spectral band is 1000, 1000, and 5000, respectively. As defined, the project sample will facilitate the study of small-scale nebular physics and many other phenomena linked to star formation at a mean spatial resolution of 20 pc. This survey also has considerable legacy value for additional topics including planetary nebulae, diffuse ionized gas, andsupernova remnants. The purpose of this paper is to present a general outlook of the survey, notably the observing strategy, galaxy sample, and science requirements.
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L. Rousseau-Nepton, R. P. Martin, C. Robert, L. Drissen, P. Amram, et al.. SIGNALS: I. Survey Description. Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P - Oxford Open Option A, 2019, 489 (4), pp.5530-5546. ⟨10.1093/mnras/stz2455⟩. ⟨hal-02347199⟩

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