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Title: A Large Ground-based Observing Campaign of the Disintegrating Planet K2-22b
Authors: Knicole D. Colón
George Zhou
Avi Shporer
Karen A. Collins
Allyson Bieryla
Néstor Espinoza
Felipe Murgas
Petchara Pattarakijwanich
Supachai Awiphan
James D. Armstrong
Jeremy Bailey
Geert Barentsen
Daniel Bayliss
Anurak Chakpor
William D. Cochran
Vikram S. Dhillon
Keith Horne
Michael Ireland
Lucyna Kedziora-Chudczer
John F. Kielkopf
Siramas Komonjinda
David W. Latham
Tom R. Marsh
David E. Mkrtichian
Enric Pallé
David Ruffolo
Ramotholo Sefako
Chris G. Tinney
Suwicha Wannawichian
Suraphong Yuma
Bay Area Environmental Research Institute
Pontificia Universidad Católica de Chile
University of Hawaii System
University of New South Wales (UNSW) Australia
Massachusetts Institute of Technology
University of St Andrews
The University of Warwick
Harvard-Smithsonian Center for Astrophysics
University of Louisville
University of Texas at Austin
Mahidol University
Instituto Astrofisico de Canarias
Australian National University
Max Planck Institut für Astronomie
NASA Goddard Space Flight Center
NASA Ames Research Center
Universidad de la Laguna
South African Astronomical Observatory
University of Sheffield
Chiang Mai University
Millennium Institute of Astrophysics
National Astronomical Research Institute of Thailand
Keywords: Earth and Planetary Sciences;Physics and Astronomy
Issue Date: 1-Nov-2018
Citation: Astronomical Journal. Vol.156, No.5 (2018)
Abstract: © 2018. The American Astronomical Society. All rights reserved. We present 45 ground-based photometric observations of the K2-22 system collected between 2016 December and 2017 May, which we use to investigate the evolution of the transit of the disintegrating planet K2-22b. Last observed in early 2015, in these new observations we recover the transit at multiple epochs and measure a typical depth of <1.5%. We find that the distribution of our measured transit depths is comparable to the range of depths measured in observations from 2014 and 2015. These new observations also support ongoing variability in the K2-22b transit shape and time, although the overall shallowness of the transit makes a detailed analysis of these transit parameters difficult. We find no strong evidence of wavelength-dependent transit depths for epochs where we have simultaneous coverage at multiple wavelengths, although our stacked Las Cumbres Observatory data collected over days-to-months timescales are suggestive of a deeper transit at blue wavelengths. We encourage continued high-precision photometric and spectroscopic monitoring of this system in order to further constrain the evolution timescale and to aid comparative studies with the other few known disintegrating planets.
ISSN: 00046256
Appears in Collections:Scopus 2018

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