Deep DECam Survey of Carina: Rubin LSST Precursor & Catalogue

With the arrival of the Rubin Legacy Survey of Space and Time (LSST), there will be unprecedented opportunities to extract large catalogues of Young Stellar Objects (YSOs) and study their distinct physical processes thanks to its deep filters and multi-band information. Using data from the Dark Energy Camera (DECam) in the 'z' band — a significant precursor to the Rubin LSST — as well as insights from its time-series data, we will present the most comprehensive and deep survey of the Carina Nebula star-forming region (SFR). We want to compare our results on this Carina Nebula SFR, rich of YSOs, to the Rubin LSST's projected performance, providing useful insights on its future capabilities. We aim to release the deepest catalogue of Carina Nebula (Tramuto et al., in prep.), that will be made to fit with the Rubin Science Platform, so that this product will be extremely useful for the Rubin LSST community, who will be able to compare DECam and LSST results on the same platform. Moreover, the DECam survey of Carina (Hartigan et al., in prep.) was made in order to retrieve useful data for a variety of scientific topics, reconstructing in less than a month of observations a similar depth as the one that the Rubin Observatory will achieve in ten years: our data will serve not only to study YSOs, but also in general for crowded field photometry, since this dataset will show what to expect with Rubin LSST photometry, given the depth it will reach. Also, our DECam time-series data will be able to retrieve the Light Curves of YSOs, among the other fast transients, having a cadence of about 20 minutes between each ‘z’ band observation for 21 successive nights. The results from this survey will show what a deep sampling in the region of the Galactic Plane can obtain, unveiling how Rubin LSST may acquire the same type of result (in much larger regions within the Galactic Plane) in an even shorter amount of time (like — for the case of YSOs — proposed in the white paper Bonito & Hartigan et al. 2018 and then in Bonito & Venuti et al. 2023), or even a deeper view using the same amount of time as in our DECam survey of Carina.