Ground-based near-UV observations of 15 transiting exoplanets

Constraints on their atmospheres and no evidence for asymmetrical transits

Jake D. Turner, Kyle A. Pearson, Lauren I. Biddle, Brianna M. Smart, Robert T. Zellem, Johanna K. Teske, Kevin K. Hardegree-Ullman, Caitlin Griffith, Robin M. Leiter, Ian T. Cates, Megan N. Nieberding, Carter Thaxton W. Smith, Robert M. Thompson, Ryan Hofmann, Michael P. Berube, Chi H. Nguyen, Lindsay C. Small, Blythe C. Guvenen, Logan Richardson, Allison McGraw & 22 others Brandon Raphael, Benjamin E. Crawford, Amy N. Robertson, Ryan Tombleson, Timothy M. Carleton, Allison P.M. Towner, Amanda M. Walker-LaFollette, Jeffrey R. Hume, Zachary T. Watson, Christen K. Jones, Matthew J. Lichtenberger, Shelby R. Hoglund, Kendall L. Cook, Cory A. Crossen, Curtis R. Jorgensen, James M. Romine, Alejandro R. Thompson, Christian F. Villegas, Ashley A. Wilson, Brent Sanford, Joanna M. Taylor, Triana N. Henz

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Transits of exoplanets observed in the near-UV have been used to study the scattering properties of their atmospheres and possible star-planet interactions. We observed the primary transits of 15 exoplanets (CoRoT-1b, GJ436b, HAT-P-1b, HAT-P-13b, HAT-P-16b, HAT-P-22b, TrES-2b, TrES-4b, WASP-1b, WASP-12b, WASP-33b, WASP-36b, WASP-44b, WASP-48b, and WASP-77Ab) in the near-UV and several optical photometric bands to update their planetary parameters, ephemerides, search for a wavelength dependence in their transit depths to constrain their atmospheres, and determine if asymmetries are visible in their light curves. Here, we present the first ground-based near-UV light curves for 12 of the targets (CoRoT-1b, GJ436b, HAT-P-1b, HAT-P-13b, HAT-P-22b, TrES-2b, TrES-4b, WASP-1b, WASP-33b, WASP-36b, WASP-48b, and WASP-77Ab). We find that none of the near-UV transits exhibit any non-spherical asymmetries, this result is consistent with recent theoretical predictions by Ben-Jaffel et al. and Turner et al. The multiwavelength photometry indicates a constant transit depth from near-UV to optical wavelengths in 10 targets (suggestive of clouds), and a varying transit depth with wavelength in 5 targets (hinting at Rayleigh or aerosol scattering in their atmospheres). We also present the first detection of a smaller near-UV transit depth than that measured in the optical in WASP-1b and a possible opacity source that can cause such radius variations is currently unknown. WASP-36b also exhibits a smaller near-UV transit depth at 2.6σ. Further observations are encouraged to confirm the transit depth variations seen in this study.

Original languageEnglish (US)
Pages (from-to)789-819
Number of pages31
JournalMonthly Notices of the Royal Astronomical Society
Volume459
Issue number1
DOIs
StatePublished - Jun 11 2016

Fingerprint

extrasolar planets
transit
atmospheres
atmosphere
wavelength
asymmetry
scattering
light curve
wavelengths
ephemerides
planet
Rayleigh scattering
aerosol
opacity
photometry
planets
aerosols
prediction
stars
radii

Keywords

  • Planet-star interactions
  • Planets and satellites: atmospheres
  • Techniques: photometric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Ground-based near-UV observations of 15 transiting exoplanets : Constraints on their atmospheres and no evidence for asymmetrical transits. / Turner, Jake D.; Pearson, Kyle A.; Biddle, Lauren I.; Smart, Brianna M.; Zellem, Robert T.; Teske, Johanna K.; Hardegree-Ullman, Kevin K.; Griffith, Caitlin; Leiter, Robin M.; Cates, Ian T.; Nieberding, Megan N.; Smith, Carter Thaxton W.; Thompson, Robert M.; Hofmann, Ryan; Berube, Michael P.; Nguyen, Chi H.; Small, Lindsay C.; Guvenen, Blythe C.; Richardson, Logan; McGraw, Allison; Raphael, Brandon; Crawford, Benjamin E.; Robertson, Amy N.; Tombleson, Ryan; Carleton, Timothy M.; Towner, Allison P.M.; Walker-LaFollette, Amanda M.; Hume, Jeffrey R.; Watson, Zachary T.; Jones, Christen K.; Lichtenberger, Matthew J.; Hoglund, Shelby R.; Cook, Kendall L.; Crossen, Cory A.; Jorgensen, Curtis R.; Romine, James M.; Thompson, Alejandro R.; Villegas, Christian F.; Wilson, Ashley A.; Sanford, Brent; Taylor, Joanna M.; Henz, Triana N.

In: Monthly Notices of the Royal Astronomical Society, Vol. 459, No. 1, 11.06.2016, p. 789-819.

Research output: Contribution to journalArticle

Turner, JD, Pearson, KA, Biddle, LI, Smart, BM, Zellem, RT, Teske, JK, Hardegree-Ullman, KK, Griffith, C, Leiter, RM, Cates, IT, Nieberding, MN, Smith, CTW, Thompson, RM, Hofmann, R, Berube, MP, Nguyen, CH, Small, LC, Guvenen, BC, Richardson, L, McGraw, A, Raphael, B, Crawford, BE, Robertson, AN, Tombleson, R, Carleton, TM, Towner, APM, Walker-LaFollette, AM, Hume, JR, Watson, ZT, Jones, CK, Lichtenberger, MJ, Hoglund, SR, Cook, KL, Crossen, CA, Jorgensen, CR, Romine, JM, Thompson, AR, Villegas, CF, Wilson, AA, Sanford, B, Taylor, JM & Henz, TN 2016, 'Ground-based near-UV observations of 15 transiting exoplanets: Constraints on their atmospheres and no evidence for asymmetrical transits', Monthly Notices of the Royal Astronomical Society, vol. 459, no. 1, pp. 789-819. https://doi.org/10.1093/mnras/stw574
Turner, Jake D. ; Pearson, Kyle A. ; Biddle, Lauren I. ; Smart, Brianna M. ; Zellem, Robert T. ; Teske, Johanna K. ; Hardegree-Ullman, Kevin K. ; Griffith, Caitlin ; Leiter, Robin M. ; Cates, Ian T. ; Nieberding, Megan N. ; Smith, Carter Thaxton W. ; Thompson, Robert M. ; Hofmann, Ryan ; Berube, Michael P. ; Nguyen, Chi H. ; Small, Lindsay C. ; Guvenen, Blythe C. ; Richardson, Logan ; McGraw, Allison ; Raphael, Brandon ; Crawford, Benjamin E. ; Robertson, Amy N. ; Tombleson, Ryan ; Carleton, Timothy M. ; Towner, Allison P.M. ; Walker-LaFollette, Amanda M. ; Hume, Jeffrey R. ; Watson, Zachary T. ; Jones, Christen K. ; Lichtenberger, Matthew J. ; Hoglund, Shelby R. ; Cook, Kendall L. ; Crossen, Cory A. ; Jorgensen, Curtis R. ; Romine, James M. ; Thompson, Alejandro R. ; Villegas, Christian F. ; Wilson, Ashley A. ; Sanford, Brent ; Taylor, Joanna M. ; Henz, Triana N. / Ground-based near-UV observations of 15 transiting exoplanets : Constraints on their atmospheres and no evidence for asymmetrical transits. In: Monthly Notices of the Royal Astronomical Society. 2016 ; Vol. 459, No. 1. pp. 789-819.
@article{9f383a6161ea4a2393d258da1bfe0d51,
title = "Ground-based near-UV observations of 15 transiting exoplanets: Constraints on their atmospheres and no evidence for asymmetrical transits",
abstract = "Transits of exoplanets observed in the near-UV have been used to study the scattering properties of their atmospheres and possible star-planet interactions. We observed the primary transits of 15 exoplanets (CoRoT-1b, GJ436b, HAT-P-1b, HAT-P-13b, HAT-P-16b, HAT-P-22b, TrES-2b, TrES-4b, WASP-1b, WASP-12b, WASP-33b, WASP-36b, WASP-44b, WASP-48b, and WASP-77Ab) in the near-UV and several optical photometric bands to update their planetary parameters, ephemerides, search for a wavelength dependence in their transit depths to constrain their atmospheres, and determine if asymmetries are visible in their light curves. Here, we present the first ground-based near-UV light curves for 12 of the targets (CoRoT-1b, GJ436b, HAT-P-1b, HAT-P-13b, HAT-P-22b, TrES-2b, TrES-4b, WASP-1b, WASP-33b, WASP-36b, WASP-48b, and WASP-77Ab). We find that none of the near-UV transits exhibit any non-spherical asymmetries, this result is consistent with recent theoretical predictions by Ben-Jaffel et al. and Turner et al. The multiwavelength photometry indicates a constant transit depth from near-UV to optical wavelengths in 10 targets (suggestive of clouds), and a varying transit depth with wavelength in 5 targets (hinting at Rayleigh or aerosol scattering in their atmospheres). We also present the first detection of a smaller near-UV transit depth than that measured in the optical in WASP-1b and a possible opacity source that can cause such radius variations is currently unknown. WASP-36b also exhibits a smaller near-UV transit depth at 2.6σ. Further observations are encouraged to confirm the transit depth variations seen in this study.",
keywords = "Planet-star interactions, Planets and satellites: atmospheres, Techniques: photometric",
author = "Turner, {Jake D.} and Pearson, {Kyle A.} and Biddle, {Lauren I.} and Smart, {Brianna M.} and Zellem, {Robert T.} and Teske, {Johanna K.} and Hardegree-Ullman, {Kevin K.} and Caitlin Griffith and Leiter, {Robin M.} and Cates, {Ian T.} and Nieberding, {Megan N.} and Smith, {Carter Thaxton W.} and Thompson, {Robert M.} and Ryan Hofmann and Berube, {Michael P.} and Nguyen, {Chi H.} and Small, {Lindsay C.} and Guvenen, {Blythe C.} and Logan Richardson and Allison McGraw and Brandon Raphael and Crawford, {Benjamin E.} and Robertson, {Amy N.} and Ryan Tombleson and Carleton, {Timothy M.} and Towner, {Allison P.M.} and Walker-LaFollette, {Amanda M.} and Hume, {Jeffrey R.} and Watson, {Zachary T.} and Jones, {Christen K.} and Lichtenberger, {Matthew J.} and Hoglund, {Shelby R.} and Cook, {Kendall L.} and Crossen, {Cory A.} and Jorgensen, {Curtis R.} and Romine, {James M.} and Thompson, {Alejandro R.} and Villegas, {Christian F.} and Wilson, {Ashley A.} and Brent Sanford and Taylor, {Joanna M.} and Henz, {Triana N.}",
year = "2016",
month = "6",
day = "11",
doi = "10.1093/mnras/stw574",
language = "English (US)",
volume = "459",
pages = "789--819",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "1",

}

TY - JOUR

T1 - Ground-based near-UV observations of 15 transiting exoplanets

T2 - Constraints on their atmospheres and no evidence for asymmetrical transits

AU - Turner, Jake D.

AU - Pearson, Kyle A.

AU - Biddle, Lauren I.

AU - Smart, Brianna M.

AU - Zellem, Robert T.

AU - Teske, Johanna K.

AU - Hardegree-Ullman, Kevin K.

AU - Griffith, Caitlin

AU - Leiter, Robin M.

AU - Cates, Ian T.

AU - Nieberding, Megan N.

AU - Smith, Carter Thaxton W.

AU - Thompson, Robert M.

AU - Hofmann, Ryan

AU - Berube, Michael P.

AU - Nguyen, Chi H.

AU - Small, Lindsay C.

AU - Guvenen, Blythe C.

AU - Richardson, Logan

AU - McGraw, Allison

AU - Raphael, Brandon

AU - Crawford, Benjamin E.

AU - Robertson, Amy N.

AU - Tombleson, Ryan

AU - Carleton, Timothy M.

AU - Towner, Allison P.M.

AU - Walker-LaFollette, Amanda M.

AU - Hume, Jeffrey R.

AU - Watson, Zachary T.

AU - Jones, Christen K.

AU - Lichtenberger, Matthew J.

AU - Hoglund, Shelby R.

AU - Cook, Kendall L.

AU - Crossen, Cory A.

AU - Jorgensen, Curtis R.

AU - Romine, James M.

AU - Thompson, Alejandro R.

AU - Villegas, Christian F.

AU - Wilson, Ashley A.

AU - Sanford, Brent

AU - Taylor, Joanna M.

AU - Henz, Triana N.

PY - 2016/6/11

Y1 - 2016/6/11

N2 - Transits of exoplanets observed in the near-UV have been used to study the scattering properties of their atmospheres and possible star-planet interactions. We observed the primary transits of 15 exoplanets (CoRoT-1b, GJ436b, HAT-P-1b, HAT-P-13b, HAT-P-16b, HAT-P-22b, TrES-2b, TrES-4b, WASP-1b, WASP-12b, WASP-33b, WASP-36b, WASP-44b, WASP-48b, and WASP-77Ab) in the near-UV and several optical photometric bands to update their planetary parameters, ephemerides, search for a wavelength dependence in their transit depths to constrain their atmospheres, and determine if asymmetries are visible in their light curves. Here, we present the first ground-based near-UV light curves for 12 of the targets (CoRoT-1b, GJ436b, HAT-P-1b, HAT-P-13b, HAT-P-22b, TrES-2b, TrES-4b, WASP-1b, WASP-33b, WASP-36b, WASP-48b, and WASP-77Ab). We find that none of the near-UV transits exhibit any non-spherical asymmetries, this result is consistent with recent theoretical predictions by Ben-Jaffel et al. and Turner et al. The multiwavelength photometry indicates a constant transit depth from near-UV to optical wavelengths in 10 targets (suggestive of clouds), and a varying transit depth with wavelength in 5 targets (hinting at Rayleigh or aerosol scattering in their atmospheres). We also present the first detection of a smaller near-UV transit depth than that measured in the optical in WASP-1b and a possible opacity source that can cause such radius variations is currently unknown. WASP-36b also exhibits a smaller near-UV transit depth at 2.6σ. Further observations are encouraged to confirm the transit depth variations seen in this study.

AB - Transits of exoplanets observed in the near-UV have been used to study the scattering properties of their atmospheres and possible star-planet interactions. We observed the primary transits of 15 exoplanets (CoRoT-1b, GJ436b, HAT-P-1b, HAT-P-13b, HAT-P-16b, HAT-P-22b, TrES-2b, TrES-4b, WASP-1b, WASP-12b, WASP-33b, WASP-36b, WASP-44b, WASP-48b, and WASP-77Ab) in the near-UV and several optical photometric bands to update their planetary parameters, ephemerides, search for a wavelength dependence in their transit depths to constrain their atmospheres, and determine if asymmetries are visible in their light curves. Here, we present the first ground-based near-UV light curves for 12 of the targets (CoRoT-1b, GJ436b, HAT-P-1b, HAT-P-13b, HAT-P-22b, TrES-2b, TrES-4b, WASP-1b, WASP-33b, WASP-36b, WASP-48b, and WASP-77Ab). We find that none of the near-UV transits exhibit any non-spherical asymmetries, this result is consistent with recent theoretical predictions by Ben-Jaffel et al. and Turner et al. The multiwavelength photometry indicates a constant transit depth from near-UV to optical wavelengths in 10 targets (suggestive of clouds), and a varying transit depth with wavelength in 5 targets (hinting at Rayleigh or aerosol scattering in their atmospheres). We also present the first detection of a smaller near-UV transit depth than that measured in the optical in WASP-1b and a possible opacity source that can cause such radius variations is currently unknown. WASP-36b also exhibits a smaller near-UV transit depth at 2.6σ. Further observations are encouraged to confirm the transit depth variations seen in this study.

KW - Planet-star interactions

KW - Planets and satellites: atmospheres

KW - Techniques: photometric

UR - http://www.scopus.com/inward/record.url?scp=84970045559&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84970045559&partnerID=8YFLogxK

U2 - 10.1093/mnras/stw574

DO - 10.1093/mnras/stw574

M3 - Article

VL - 459

SP - 789

EP - 819

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 1

ER -