SIGNALS, the Star formation, Ionized Gas, and Nebular Abundances Legacy Survey,
will be based on a volume-limited sample of local extended galaxies (D 10 Mpc) that are actively forming massive stars.
Observations are made at the Canada-France-Hawaii Telescope with SITELLE, an Imaging Fourier Transform Spectrograph.
It will provide the largest and most complete database of spectroscopically and spatially resolved extragalactic HII regions ever assembled.
This will enable us to study small-scale nebular physics and many other phenomena
linked to massive star formation in galaxies at a mean spatial resolution of 20 pc.
As is, our sample includes 40 spiral and irregular galaxies. HII regions present a wide variety of characteristics:
morphology (from compact to extended shell), mass (where the low luminosity regime is not very well sampled),
metallicity (where the rare metal-poor regions have been less studied ), or age (following the diversity of their young stellar populations).
They may be located in very different galactic ecosystems and coexist with other sources of ionization (like shocks and AGN).
The volume-limited sample will provide a statistically reliable laboratory, with over 50 000 HII regions resolved.
The SIGNALS collaboration is composed of an interdisciplinary team of expertise covering many fields of extragalactic astrophysics.
Our team is inclusive and welcome new collaborators!