skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: THE SUB-SATURN MASS TRANSITING PLANET HAT-P-12b

Abstract

We present new photometric data of the transiting planet HAT-P-12b observed in 2011. Our three transit curves are modeled using the JKTEBOP code and adopting the quadratic limb-darkening law. Including our measurements, 18 transit times spanning about 4.2 yr were used to determine the improved ephemeris with a transit epoch of 2,454,187.85560 {+-} 0.00011 BJD and an orbital period of 3.21305961 {+-} 0.00000035 days. The physical properties of the star-planet system are computed using empirical calibrations from eclipsing binary stars and stellar evolutionary models, combined with both our transit parameters and previously known spectroscopic results. We found that the absolute dimensions of the host star are M{sub A} = 0.73 {+-} 0.02 M{sub Sun }, R{sub A} = 0.70 {+-} 0.01 R{sub Sun }, log g{sub A} = 4.61 {+-} 0.02, {rho}{sub A} = 2.10 {+-} 0.09 {rho}{sub Sun }, and L{sub A} = 0.21 {+-} 0.01 L{sub Sun }. The planetary companion has M{sub b} = 0.21 {+-} 0.01 M{sub Jup}, R{sub b} = 0.94 {+-} 0.01 R{sub Jup}, log g{sub b} = 2.77 {+-} 0.02, {rho}{sub b} = 0.24 {+-} 0.01 {rho}{sub Jup}, and T{sub eq} = 960 {+-} 14 K. Our results agree well with standard modelsmore » of irradiated gas giants with a core mass of 11.3 M{sub Circled-Plus }.« less

Authors:
; ; ;
Publication Date:
OSTI Identifier:
22034663
Resource Type:
Journal Article
Journal Name:
Astronomical Journal (New York, N.Y. Online)
Additional Journal Information:
Journal Volume: 143; Journal Issue: 4; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1538-3881
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTRONOMY; ASTROPHYSICS; BINARY STARS; CALIBRATION; COMPUTERIZED SIMULATION; DIAGRAMS; ECLIPSE; EMISSION SPECTROSCOPY; J CODES; MASS; PHOTOMETRY; PHYSICAL PROPERTIES; STAR EVOLUTION

Citation Formats

Lee, Jae Woo, Youn, Jae-Hyuck, Kim, Seung-Lee, Lee, Chung-Uk, and Hinse, Tobias Cornelius, E-mail: jwlee@kasi.re.kr, E-mail: jhyoon@kasi.re.kr, E-mail: slkim@kasi.re.kr, E-mail: leecu@kasi.re.kr, E-mail: tchinse@gmail.com. THE SUB-SATURN MASS TRANSITING PLANET HAT-P-12b. United States: N. p., 2012. Web. doi:10.1088/0004-6256/143/4/95.
Lee, Jae Woo, Youn, Jae-Hyuck, Kim, Seung-Lee, Lee, Chung-Uk, & Hinse, Tobias Cornelius, E-mail: jwlee@kasi.re.kr, E-mail: jhyoon@kasi.re.kr, E-mail: slkim@kasi.re.kr, E-mail: leecu@kasi.re.kr, E-mail: tchinse@gmail.com. THE SUB-SATURN MASS TRANSITING PLANET HAT-P-12b. United States. https://doi.org/10.1088/0004-6256/143/4/95
Lee, Jae Woo, Youn, Jae-Hyuck, Kim, Seung-Lee, Lee, Chung-Uk, and Hinse, Tobias Cornelius, E-mail: jwlee@kasi.re.kr, E-mail: jhyoon@kasi.re.kr, E-mail: slkim@kasi.re.kr, E-mail: leecu@kasi.re.kr, E-mail: tchinse@gmail.com. 2012. "THE SUB-SATURN MASS TRANSITING PLANET HAT-P-12b". United States. https://doi.org/10.1088/0004-6256/143/4/95.
@article{osti_22034663,
title = {THE SUB-SATURN MASS TRANSITING PLANET HAT-P-12b},
author = {Lee, Jae Woo and Youn, Jae-Hyuck and Kim, Seung-Lee and Lee, Chung-Uk and Hinse, Tobias Cornelius, E-mail: jwlee@kasi.re.kr, E-mail: jhyoon@kasi.re.kr, E-mail: slkim@kasi.re.kr, E-mail: leecu@kasi.re.kr, E-mail: tchinse@gmail.com},
abstractNote = {We present new photometric data of the transiting planet HAT-P-12b observed in 2011. Our three transit curves are modeled using the JKTEBOP code and adopting the quadratic limb-darkening law. Including our measurements, 18 transit times spanning about 4.2 yr were used to determine the improved ephemeris with a transit epoch of 2,454,187.85560 {+-} 0.00011 BJD and an orbital period of 3.21305961 {+-} 0.00000035 days. The physical properties of the star-planet system are computed using empirical calibrations from eclipsing binary stars and stellar evolutionary models, combined with both our transit parameters and previously known spectroscopic results. We found that the absolute dimensions of the host star are M{sub A} = 0.73 {+-} 0.02 M{sub Sun }, R{sub A} = 0.70 {+-} 0.01 R{sub Sun }, log g{sub A} = 4.61 {+-} 0.02, {rho}{sub A} = 2.10 {+-} 0.09 {rho}{sub Sun }, and L{sub A} = 0.21 {+-} 0.01 L{sub Sun }. The planetary companion has M{sub b} = 0.21 {+-} 0.01 M{sub Jup}, R{sub b} = 0.94 {+-} 0.01 R{sub Jup}, log g{sub b} = 2.77 {+-} 0.02, {rho}{sub b} = 0.24 {+-} 0.01 {rho}{sub Jup}, and T{sub eq} = 960 {+-} 14 K. Our results agree well with standard models of irradiated gas giants with a core mass of 11.3 M{sub Circled-Plus }.},
doi = {10.1088/0004-6256/143/4/95},
url = {https://www.osti.gov/biblio/22034663}, journal = {Astronomical Journal (New York, N.Y. Online)},
issn = {1538-3881},
number = 4,
volume = 143,
place = {United States},
year = {Sun Apr 15 00:00:00 EDT 2012},
month = {Sun Apr 15 00:00:00 EDT 2012}
}