A Large Ground-based Observing Campaign of the Disintegrating Planet K2-22b

Colon, Knicole D. and Zhou, George ORCID: https://orcid.org/0000-0002-4891-3517 and Shporer, Avi and Collins, Karen A. and Bieryla, Allyson and Espinoza, Nestor and Murgas, Felipe and Pattarakijwanich, Petchara and Awiphan, Supachai and Armstrong, James D. and Bailey, Jeremy and Barentsen, Geert and Bayliss, Daniel and Chakpor, Anurak and Cochran, William D. and Dhillon, Vikram S. and Horne, Keith and Ireland, Michael and Kedziora-Chudczer, Lucyna and Kielkopf, John F. and Komonjinda, Siramas and Latham, David W. and Marsh, Tom. R. and Mkrtichian, David E. and Palle, Enric and Ruffolo, David and Sefako, Ramotholo and Tinney, Chris G. and Wannawichian, Suwicha and Yuma, Suraphong (2018) A Large Ground-based Observing Campaign of the Disintegrating Planet K2-22b. The Astronomical Journal, 156 (5):227. pp. 1-11. ISSN 0004-6256

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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.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 08 Feb 2022 05:07
Last Modified: 14 Feb 2022 00:38
Uncontrolled Keywords: planets and satellites: detection; planets and satellites: individual (K2-22 b); techniques: photometric; Astrophysics - Earth and Planetary Astrophysics
Fields of Research (2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280120 Expanding knowledge in the physical sciences
Identification Number or DOI: https://doi.org/10.3847/1538-3881/aae31b
URI: http://eprints.usq.edu.au/id/eprint/44981

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