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Title: SYSTEM PARAMETERS, TRANSIT TIMES, AND SECONDARY ECLIPSE CONSTRAINTS OF THE EXOPLANET SYSTEMS HAT-P-4, TrES-2, TrES-3, and WASP-3 FROM THE NASA EPOXI MISSION OF OPPORTUNITY

Abstract

As part of the NASA EPOXI Mission of Opportunity, we observed seven known transiting extrasolar planet systems in order to construct time series photometry of extremely high phase coverage and precision. Here we present the results for four 'hot-Jupiter systems' with near-solar stars-HAT-P-4, TrES-3, TrES-2, and WASP-3. We observe 10 transits of HAT-P-4, estimating the planet radius R{sub p} = 1.332 {+-} 0.052 R{sub Jup}, the stellar radius R{sub *} = 1.602 {+-} 0.061 R{sub sun}, the inclination i = 89.67 {+-} 0.30 deg, and the transit duration from first to fourth contact {tau} = 255.6 {+-} 1.9 minutes. For TrES-3, we observe seven transits and find R{sub p} = 1.320 {+-} 0.057 R{sub Jup}, R{sub *} = 0.817 {+-} 0.022 R{sub sun}, i = 81.99 {+-} 0.30 deg, and {tau} = 81.9 {+-} 1.1 minutes. We also note a long-term variability in the TrES-3 light curve, which may be due to star spots. We observe nine transits of TrES-2 and find R{sub p} = 1.169 {+-} 0.034 R{sub Jup}, R{sub *} = 0.940 {+-} 0.026 R{sub sun}, i = 84.15 {+-} 0.16 deg, and {tau} = 107.3 {+-} 1.1 minutes. Finally, we observe eight transits of WASP-3, finding R{submore » p} = 1.385 {+-} 0.060 R{sub Jup}, R{sub *} = 1.354 {+-} 0.056 R{sub sun}, i = 84.22 {+-} 0.81 deg, and {tau} = 167.3 {+-} 1.3 minutes. We present refined orbital periods and times of transit for each target. We state 95% confidence upper limits on the secondary eclipse depths in our broadband visible bandpass centered on 650 nm. These limits are 0.073% for HAT-P-4, 0.062% for TrES-3, 0.16% for TrES-2, and 0.11% for WASP-3. We combine the TrES-3 secondary eclipse information with the existing published data and confirm that the atmosphere likely does not have a temperature inversion.« less

Authors:
; ; ;  [1]; ; ; ;  [2]; ;  [3]; ;  [4];  [5]
  1. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
  2. Goddard Space Flight Center, Greenbelt, MD 20771 (United States)
  3. Massachusetts Institute of Technology, Cambridge, MA 02159 (United States)
  4. University of Maryland, College Park, MD 20742 (United States)
  5. University of Alaska Fairbanks, Fairbanks, AK 99775 (United States)
Publication Date:
OSTI Identifier:
21567651
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 726; Journal Issue: 2; Other Information: DOI: 10.1088/0004-637X/726/2/94; Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ECLIPSE; PLANETS; STARS

Citation Formats

Christiansen, Jessie L, Ballard, Sarah, Charbonneau, David, Holman, Matthew J, Deming, Drake, Barry, Richard K, Livengood, Timothy A, Hewagama, Tilak, Madhusudhan, Nikku, Seager, Sara, Wellnitz, Dennis D, A'Hearn, Michael F, Hampton, Don L, and Lisse, Carey M., E-mail: jchristi@cfa.harvard.edu. SYSTEM PARAMETERS, TRANSIT TIMES, AND SECONDARY ECLIPSE CONSTRAINTS OF THE EXOPLANET SYSTEMS HAT-P-4, TrES-2, TrES-3, and WASP-3 FROM THE NASA EPOXI MISSION OF OPPORTUNITY. United States: N. p., 2011. Web. doi:10.1088/0004-637X/726/2/94.
Christiansen, Jessie L, Ballard, Sarah, Charbonneau, David, Holman, Matthew J, Deming, Drake, Barry, Richard K, Livengood, Timothy A, Hewagama, Tilak, Madhusudhan, Nikku, Seager, Sara, Wellnitz, Dennis D, A'Hearn, Michael F, Hampton, Don L, & Lisse, Carey M., E-mail: jchristi@cfa.harvard.edu. SYSTEM PARAMETERS, TRANSIT TIMES, AND SECONDARY ECLIPSE CONSTRAINTS OF THE EXOPLANET SYSTEMS HAT-P-4, TrES-2, TrES-3, and WASP-3 FROM THE NASA EPOXI MISSION OF OPPORTUNITY. United States. https://doi.org/10.1088/0004-637X/726/2/94
Christiansen, Jessie L, Ballard, Sarah, Charbonneau, David, Holman, Matthew J, Deming, Drake, Barry, Richard K, Livengood, Timothy A, Hewagama, Tilak, Madhusudhan, Nikku, Seager, Sara, Wellnitz, Dennis D, A'Hearn, Michael F, Hampton, Don L, and Lisse, Carey M., E-mail: jchristi@cfa.harvard.edu. 2011. "SYSTEM PARAMETERS, TRANSIT TIMES, AND SECONDARY ECLIPSE CONSTRAINTS OF THE EXOPLANET SYSTEMS HAT-P-4, TrES-2, TrES-3, and WASP-3 FROM THE NASA EPOXI MISSION OF OPPORTUNITY". United States. https://doi.org/10.1088/0004-637X/726/2/94.
@article{osti_21567651,
title = {SYSTEM PARAMETERS, TRANSIT TIMES, AND SECONDARY ECLIPSE CONSTRAINTS OF THE EXOPLANET SYSTEMS HAT-P-4, TrES-2, TrES-3, and WASP-3 FROM THE NASA EPOXI MISSION OF OPPORTUNITY},
author = {Christiansen, Jessie L and Ballard, Sarah and Charbonneau, David and Holman, Matthew J and Deming, Drake and Barry, Richard K and Livengood, Timothy A and Hewagama, Tilak and Madhusudhan, Nikku and Seager, Sara and Wellnitz, Dennis D and A'Hearn, Michael F and Hampton, Don L and Lisse, Carey M., E-mail: jchristi@cfa.harvard.edu},
abstractNote = {As part of the NASA EPOXI Mission of Opportunity, we observed seven known transiting extrasolar planet systems in order to construct time series photometry of extremely high phase coverage and precision. Here we present the results for four 'hot-Jupiter systems' with near-solar stars-HAT-P-4, TrES-3, TrES-2, and WASP-3. We observe 10 transits of HAT-P-4, estimating the planet radius R{sub p} = 1.332 {+-} 0.052 R{sub Jup}, the stellar radius R{sub *} = 1.602 {+-} 0.061 R{sub sun}, the inclination i = 89.67 {+-} 0.30 deg, and the transit duration from first to fourth contact {tau} = 255.6 {+-} 1.9 minutes. For TrES-3, we observe seven transits and find R{sub p} = 1.320 {+-} 0.057 R{sub Jup}, R{sub *} = 0.817 {+-} 0.022 R{sub sun}, i = 81.99 {+-} 0.30 deg, and {tau} = 81.9 {+-} 1.1 minutes. We also note a long-term variability in the TrES-3 light curve, which may be due to star spots. We observe nine transits of TrES-2 and find R{sub p} = 1.169 {+-} 0.034 R{sub Jup}, R{sub *} = 0.940 {+-} 0.026 R{sub sun}, i = 84.15 {+-} 0.16 deg, and {tau} = 107.3 {+-} 1.1 minutes. Finally, we observe eight transits of WASP-3, finding R{sub p} = 1.385 {+-} 0.060 R{sub Jup}, R{sub *} = 1.354 {+-} 0.056 R{sub sun}, i = 84.22 {+-} 0.81 deg, and {tau} = 167.3 {+-} 1.3 minutes. We present refined orbital periods and times of transit for each target. We state 95% confidence upper limits on the secondary eclipse depths in our broadband visible bandpass centered on 650 nm. These limits are 0.073% for HAT-P-4, 0.062% for TrES-3, 0.16% for TrES-2, and 0.11% for WASP-3. We combine the TrES-3 secondary eclipse information with the existing published data and confirm that the atmosphere likely does not have a temperature inversion.},
doi = {10.1088/0004-637X/726/2/94},
url = {https://www.osti.gov/biblio/21567651}, journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 726,
place = {United States},
year = {Mon Jan 10 00:00:00 EST 2011},
month = {Mon Jan 10 00:00:00 EST 2011}
}