Ancillary science with Ariel: Feasibility and scientific potential of young stellar object observations

Abstract

To investigate the feasibility of ancillary target observations with ESA's Ariel mission, we compiled a list of potentially interesting young stars: FUors, systems harbouring extreme debris discs and a larger sample of young stellar objects showing strong near/mid-infrared excess. These objects can be observed as additional targets in the waiting times between the scheduled exoplanet transit and occultation observations. After analyzing the schedule for Ariel an algorithm was constructed to find the optimal target to be observed in each gap. The selection was mainly based on the slew and stabilization time needed to observe the selected YSO, but it also incorporated the scientific importance of the targets and whether they have already been sufficiently measured. After acquiring an adequately large sample of simulation data, it was concluded that approximately 99.2% of the available -- at least one hour long -- gaps could be used effectively. With an average slewing and stabilization time of about 16.7 minutes between scheduled exoplanet transits and ancillary targets, this corresponds to an additional $2881\pm 56$ hours of active data gathering. When this additional time is used to observe our selected 200 ancillary targets, a typical signal-to-noise ratio of $\sim$10${}^4$ can be achieved along the whole spectral window covered by Ariel.

arXiv commentAccepted for publication in Experimental Astronomy

References in corpus (24)

• Gaia Data Release 2. Summary of the contents and survey properties
• Theory of Star Formation
• Estimating distances from parallaxes IV: Distances to 1.33 billion stars in Gaia Data Release 2
• Protoplanetary Disks and Their Evolution
• Episodic formation of cometary material in the outburst of a solar-like young star
• A Near-IR Spectroscopic Survey of FU Orionis Objects
• Formation of giant planets and brown dwarfs on wide orbits
• Episodic Accretion in Young Stars
• A systematic survey for eruptive young stellar objects using mid-infrared photometry
• Identification of Young Stellar Object candidates in the $Gaia$ DR2 x AllWISE catalogue with machine learning methods
• Ex Lupi from Quiescence to Outburst: Exploring the LTE Approach in Modelling Blended H2O and OH Mid-Infrared Emission
• Variability of the Infrared Excess of Extreme Debris Disks
• Planetary Collisions outside the Solar System: Time Domain Characterization of Extreme Debris Disks
• Chemical tracers of episodic accretion in low-mass protostars
• CO2 Ice toward Low-luminosity, Embedded Protostars: Evidence for Episodic Mass Accretion via Chemical History
• Fundamental aspects of episodic accretion chemistry explored with single-point models
• Chemical Evolution in VeLLOs
• Chemical Signatures of the FU Ori Outbursts
• The chemistry of episodic accretion in embedded objects. 2D radiation thermo-chemical models of the post-burst phase
• Mid-Infrared Spectral Variability Atlas of Young Stellar Objects
• The Spitzer c2d Survey of Nearby Dense Cores XI : Infrared and Submillimeter Observations of CB130
• A new sample of warm extreme debris disks from the ALLWISE catalog
• The chemistry of planet-forming regions is not interstellar
• ExoSim: the Exoplanet Observation Simulator