EROSITAwiki: Diff for "EroStars/EcReqeuest_RosariaBonito"

EroStars EC Proposal 1

Proposal Date : 15-nov-2019

• Changed : 22-Nov-2019 by AndreaMerloni : Reason Accepted

Proposal Date : 11-jan-2021

• Changed : 18-Feb-2021 by BeateStelzer : Reason Renewal

Scientific Proposal

A multi-wavelength characterization is crucial to confirm the nature of transient events. We propose multi-wavelength opt/IR support for accretion bursts on young stellar objects. (YSOs) detected in X-rays during eRASS. With its repeated all-sky survey for a total time span of 4-yrs eRASS is ideally suited to detect variability on the time-scales of months, as typical for these so-called FUOR or EXOR events. However, their identification as accretion bursts requires opt/IR follow-up. The unprecedented sensitivity and spatial coverage, together with the survey duration (10 years) and observing cadence of the Large Synoptic Survey Telescope (LSST) will be ideal for the monitoring of accretion bursts as EXOrs in YSOs. The LSST WG “Non degenerate Eruptive Variables includes the science topic of YSOs with eruptive accretion and the proposer (R. Bonito - R. B.) currently. Acts as Chair of this WG. The proposed project will allow an overlap between the two surveys, being LSST expected to start its operations at the end of 2022 and eRASS being operative for the next 4 years. In any case the LSST follow-up will be assured for the next decade. R. B. is also collaborator of programs focused on opt/IR studies of YSOs and young clusters where eruptive accretion events can be observed/discovered (exploring also accretion, shocks, ejection processes, their variability, and disk properties around YSOs) with currently available or future instruments as: FLAMES, also in the context of the Gaia-ESO Survey (GES), being R. B. the responsible since the first Data Release of GES of the accretion parameters; X-Shooter, being R. B. involved in a GTO dedicated to YSOs and in several GO on young stars and clusters; WEAVE, being R. B. an official member of the Stellar, Circumstellar and Interstellar Physics (SCIP) /YSO WG, whose operations will start next year (2020).

Proposal

List of Potential Collaborators within eROSITA_DE

B.Stelzer & other interested members of eROStars

Expected Outcome

The multi-wavelength follow-up of EXOr variables detected in eRASS that will be provided through our collaboration are essential for the interpretation of the eROSITA data of these objects. Any eventual publication on eRASS detections of EXOr variables will depend on and include the complementary optical/IR data that we provide. The targets are transients, therefore unpredictable; an NRTA trigger has been submitted by B.Stelzer.

Expected duration of the project

The project will extend over the full 4-yr eROSITA survey phase, i.e. we forecast future extension request of the EC status.