Author(s):
Osborn, H. P. ; Kenworthy, M. ; Rodriguez, J. E. ; De Mooij, E. J.W. ; Kennedy, G. M. ; Relles, H. ; Gomez, E. ; Hippke, M. ; Banfi, M. ; Barbieri, L. ; Becker, I. S. [UNESP] ; Benni, P. ; Berlind, P. ; Bieryla, A. ; Bonnoli, G. ; Boussier, H. ; Brincat, S. M. ; Briol, J. ; Burleigh, M. R. ; Butterley, T. ; Calkins, M. L. ; Chote, P. ; Ciceri, S. ; Deldem, M. ; Dhillon, V. S. ; Dose, E. ; Dubois, F. ; Dvorak, S. ; Esquerdo, G. A. ; Evans, D. F. ; Ferratfiat, S. ; Fossey, S. J. ; Günther, M. N. ; Hall, J. ; Hambsch, F. J. ; Herrero, E. ; Hills, K. ; James, R. ; Jayawardhana, R. ; Kafka, S. ; Killestein, T. L. ; Kotnik, C. ; Latham, D. W. ; Lemay, D. ; Lewin, P. ; Littlefair, S. ; Lopresti, C. ; Mallonn, M. ; Mancini, L. ; Marchini, A. ; McCormac, J. J. ; Murawski, G. ; Myers, G. ; Papini, R. ; Popov, V. ; Quadri, U. ; Quinn, S. N. ; Raynard, L. ; Rizzuti, L. ; Robertson, J. ; Salvaggio, F. ; Scholz, A. ; Sfair, R. [UNESP] ; Smith, A. M.S. ; Southworth, J. ; Tan, T. G. ; Vanaverbeke, S. ; Waagen, E. O. ; Watson, C. A. ; West, R. G. ; Winter, O. C. [UNESP] ; Wheatley, P. J. ; Wilson, R. W. ; Zhou, G.
Date: 2019
Persistent ID: http://hdl.handle.net/11449/190383
Origin: Oasisbr
Subject(s): Her-big Ae/Be; Protoplanetary discs; Stars: individual:PDS 110; Stars: variables: T Tauri
Description
Made available in DSpace on 2019-10-06T17:11:24Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-02-15
Council for Learning Disabilities
Lung Cancer Online Foundation
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 paper, we present data from a ground-based observing campaign designed to measure the star both photometrically and spectroscopically during the time of predicted eclipse in 2017 September. Despite high-quality photometry, the predicted eclipse did not occur, although coherent structure is present suggesting variable amounts of stellar flux or dust obscuration. We also searched for radial velocity (RV) oscillations caused by any hypothetical companion and can rule out close binaries to 0.1Ms. A search of Sonneberg plate archive data also enabled us to extend the photometric baseline of this star back more than 50 yr, and similarly does not re-detect any deep eclipses. Taken together, they suggest that the eclipses seen in WASP and KELT photometry were due to aperiodic events. It would seem that PDS 110 undergoes stochastic dimmings that are shallower and of shorter duration than those of UX Ori variables, but may have a similar mechanism.
Aix Marseille Université CNRS LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326
Leiden Observatory Leiden University, PO Box 9513
Harvard-Smithsonian Center for Astrophysics, 60 Garden St
Department of Physics University of Warwick, Gibbet Hill Road
Centre for Exoplanets and Habitability University of Warwick, Gibbet Hill Road
Las Cumbres Observatory, 6740 Cortona Drive
School of Physical Sciences Centre for Astrophysics and Relativity Dublin City University
Sonneberg Observatory, Sternwarte str 32
UNESP Sã Paulo State University Grupo de Dinâmica Orbital e Plane-tologia
Acton Sky Portal (Private observatory)
Astronomical Observatory Dipartimento di Scienze Fisiche della Terra e dell'Ambiente University of Siena
Department of Physics and Astronomy Leicester Institute of Space and Earth Observation University of Leicester
Centre for Advanced Instrumentation Department of Physics University of Durham, South Road
Department of Astronomy Stockholm University Alba Nova University Center
Department of Physics Astronomy University of Sheffield
Instituto de Astrofísica de Canarias, E-38205
AstroLAB IRIS, Verbrandemolenstraat 5
Astrophysics Group Keele University
UCL Observatory (UCLO), 553 Watford Way
Department of Physics and Astronomy University College London, Gower St
Astrophysics Group Cavendish Laboratory, J.J. Thomson Avenue
Vereniging Voor Sterrenkunde (VVS)
Montsec Astronomical Observatory (OAdM) Institut d'Estudis Espacials de Catalunya (IEEC)
Physics Astronomy York University
American Association of Variable Star Observers, 49 Bay State Road
Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16
Department of Physics University of Rome Tor Vergata, Via della Ricerca Scientifica 1
Max-Planck-Institut für Astronomie Königstuhl 17
INAF - Astrophysical Observatory of Turin, Via Osservatorio 20
Faculty of Medicine Medical University of Bialystok
Department of Physics and Astronomy Shumen University
Arkansas Tech University, 1701 N. Boulder Ave.
SUPA School of Physics Astronomy, North Haugh
Institute of Planetary Research German Aerospace Center, Rutherfordstr. 2
Perth Exoplanet Survey Telescope (PEST)
Astrophysics Research Centre Queen's University Belfast
UNESP Sã Paulo State University Grupo de Dinâmica Orbital e Plane-tologia
