Towards an understanding of YSO variability: A multi-wavelength analysis of bursting, dipping, and symmetrically varying light curves of disc-bearing YSOs

Abstract

Using simultaneous optical and infrared light curves of disc-bearing young stars in NGC 2264, we perform the first multi-wavelength structure function study of YSOs. We find that dippers have larger variability amplitudes than bursters and symmetric variables at all timescales longer than a few hours. By analysing optical-infrared colour time-series, we also find that the variability in the bursters is systematically less chromatic at all timescales than the other variability types. We propose a model of YSO variability in which symmetric, bursting, and dipping behaviour is observed in systems viewed at low, intermediate, and high inclinations, respectively. We argue that the relatively short thermal timescale for the disc can explain the fact that the infrared light curves for bursters are more symmetric than their optical counterparts.

24 pages, 24 figures, 3 tables. Accepted for publication in MNRAS

References in corpus (36)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• The Infrared Array Camera (IRAC) for the Spitzer Space Telescope
• The Spitzer Space Telescope Mission
• The K2 Mission: Characterization and Early results
• CSI 2264: Simultaneous optical and infrared light curves of young disk-bearing stars in NGC 2264 with CoRoT and Spitzer-- evidence for multiple origins of variability
• Magnetospheric accretion-ejection processes in the classical T Tauri star AA
• Pre-main-sequence isochrones -- II. Revising star and planet formation timescales
• YSOVAR: the first sensitive, wide-area, mid-IR photometric monitoring of the ONC
• Eclipses by circumstellar material in the T Tauri star AA Tau. II. Evidence for non-stationary magnetospheric accretion
• A rotational and variability study of a large sample of PMS stars in NGC 2264
• Accretion dynamics and disk evolution in NGC 2264: a study based on the Corot photometric observations
• Variability in active galactic nuclei: confrontation of models with observations
• CSI 2264: Probing the inner disks of AA Tau-like systems in NGC 2264
• Dust Transport in Protostellar Disks Through Turbulence and Settling
• The many-faceted light curves of young disk-bearing stars in Upper Sco and $\rho$ Oph observed by $K2$ Campaign 2
• Young Stellar Object Variability (YSOVAR): Long Timescale Variations in the Mid-Infrared
• CSI 2264: Investigating rotation and its connection with disk accretion in the young open cluster NGC 2264
• CSI 2264: Characterizing Young Stars in NGC 2264 with Short-Duration, Periodic Flux Dips in their Light Curves
• A continuum of accretion burst behavior in young stars observed by K2
• Determining the recurrence timescale of long-lasting YSO outbursts
• Long Term Variability of SDSS Quasars
• Multi-epoch Ultraviolet HST Observations of Accreting Low-mass Stars
• CSI 2264: Characterizing Young Stars in NGC 2264 with Stochastically Varying Light Curves
• An algorithm for Monte-Carlo time-dependent radiation transfer
• Rotation of young stars in Cepheus OB3b
• Long-term variability of T Tauri stars using WASP
• Star-disc (mis-)alignment in Rho Oph and Upper Sco: insights from spatially resolved disc systems with K2 rotation periods
• The Gaia-ESO Survey: age spread in the star forming region NGC6530 from the HR diagram and gravity indicators
• Multicolor Variability of Young Stars in the Lagoon Nebula: Driving Causes and Intrinsic Timescales
• Characterising the i-band variability of YSOs over six orders of magnitude in timescale
• Simulated Performance of Timescale Metrics for Aperiodic Light Curves
• The dipper population of Taurus seen with K2
• Synthetic Light Curves of Accretion Variability in T Tauri Stars
• Photo-reverberation Mapping of a Protoplanetary Accretion Disk around a T Tauri Star
• Time Dependent Models of Magnetospheric Accretion onto Young Stars

Cited by in corpus (4)

• Persistent and occasional: searching for the variable population of the ZTF/4MOST sky using ZTF data release 11
• The most variable VVV sources: eruptive protostars, dipping giants in the Nuclear Disc and others
• Short- and long-term variations of the high mass accretion rate classical T Tauri star DR Tau
• Granulation on a quiet K dwarf: HD 166620 I. Spectral signatures as a function of line-formation temperature