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Investigating the magnetospheric accretion process in the young pre-transitional disk system DoAr 44 (V2062 Oph)
(European Southern Observatory, 2020)
Context. Young stars interact with their accretion disk through their strong magnetosphere.
Aims. We aim to investigate the magnetospheric accretion/ejection process in the young stellar system DoAr 44 (V2062 Oph).
Methods. ...
A population of eruptive variable protostars in VVV
(OXFORD UNIV PRESS, 2016-11)
We present the discovery of 816 high-amplitude infrared variable stars (ΔKs > 1 mag) in 119 deg2 of the Galactic mid-plane covered by the VISTA Variables in the Via Lactea (VVV) survey. Almost all are new discoveries and ...
TW Hya: Spectral Variability, X-Rays, and Accretion Diagnostics
(Iop Publishing, 2012-04-17)
The nearest accreting T Tauri star, TW Hya was intensively and continuously observed over ~17 days with spectroscopic and photometric measurements from four continents simultaneous with a long segmented exposure using the ...
Probing protoplanetary disk evolution in the Chamaeleon II region
(EDP Sciences, 2021)
Context. Characterizing the evolution of protoplanetary disks is necessary to improve our understanding of planet formation. Constraints on both dust and gas are needed to determine the dominant disk dissipation ...
Molecules with ALMA at Planet-forming Scales (MAPS). V. CO Gas Distributions
(IOP, 2021)
Here we present high-resolution (15–24 au) observations of CO isotopologue lines from the Molecules with ALMA on Planet-forming Scales (MAPS) ALMA Large Program. Our analysis employs observations of the (J = 2–1) and (1–0) ...
Estudio de variabilidad fotométrica en estrellas de tipo T Tauri
(2019-03)
Las estrellas jóvenes de tipo T Tauri tienen la edad adecuada para el inicio del proceso de formación planetaria de acuerdo a los modelos más aceptados en la actualidad. Sin embargo éstas presentan algunos desafíos para ...
The PDS 110 observing campaign - photometric and spectroscopic observations reveal eclipses are aperiodic
(2019-02-15)
PDS 110 is a young disc-hosting star in the Orion OB1A association. Two dimming events of similar depth and duration were seen in 2008 (WASP) and 2011 (KELT), consistent with an object in a closed periodic orbit. In this ...
Analysis of physical processes in eruptive YSOs with near-infrared spectra and multiwavelength light curves
(Royal Astronomical Society, 2021)
The decade-long Vista Variables in the Via Lactea (VVV) survey has detected numerous highly variable young stellar objects (YSOs). We present a study of 61 highly variable VVV YSOs (ΔKs = 1–5 mag), combining near-infrared ...
The eccentric cavity, triple rings, two-armed spirals, and double clumps of the MWC 758 disk
(IOP Publishing, 2018-06-20)
Spatially resolved structures in protoplanetary disks hint at unseen planets. Previous imaging observations of the transitional disk around MWC 758 revealed an inner cavity, a ring-like outer disk, emission clumps, and ...
Observations of edge-on protoplanetary disks with ALMA I. Results from continuum data
(EDP, 2020)
Aims. We aim to study vertical settling and radial drift of dust in protoplanetary disks from a different perspective: an edge-on view. An estimation of the amplitude of settling and drift is highly relevant to understanding ...