Photometric observations of the K2-22 system

DOI

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.

Identifier
DOI http://doi.org/10.26093/cds/vizier.51560227
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/AJ/156/227
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/156/227
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/156/227
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/AJ/156/227
Provenance
Creator Colon K.D.; Zhou G.; Shporer A.; Collins K.A.; Bieryla A.; Espinoza N.,Murgas F.; Pattarakijwanich P.; Awiphan S.; Armstrong J.D.; Bailey J.,Barentsen G.; Bayliss D.; Chakpor A.; Cochran W.D.; Dhillon V.S.; Horne K.,Ireland M.; Kedziora-Chudczer L.; Kielkopf J.F.; Komonjinda S.; Latham D.W.,Marsh T.R.; Mkrtichian D.E.; Palle E.; Ruffolo D.; Sefako R.; Tinney C.G.,Wannawichian S.; Yuma S.
Publisher CDS
Publication Year 2019
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Exoplanet Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy