Transits of Known Planets Orbiting a Naked-Eye Star

Stephen R. Kane; Selçuk Yalçınkaya; Hugh P. Osborn; Paul A. Dalba; Louise D. Nielsen; Andrew Vanderburg; Teo Močnik; Natalie R. Hinkel; Colby Ostberg; Ekrem Murat Esmer; Stéphane Udry; Tara Fetherolf; Özgür Baştürk; George R. Ricker; Roland Vanderspek; David W. Latham; Sara Seager; Joshua N. Winn; Jon M. Jenkins; Romain Allart; Jeremy Bailey; Jacob L. Bean; Francois Bouchy; R. Paul Butler; Tiago L. Campante; Brad D. Carter; Tansu Daylan; Magali Deleuil; Rodrigo F. Diaz; Xavier Dumusque; David Ehrenreich; Jonathan Horner; Andrew W. Howard; Howard Isaacson; Hugh R. A. Jones; Martti H. Kristiansen; Christophe Lovis; Geoffrey W. Marcy; Maxime Marmier; Simon J. O'Toole; Francesco Pepe; Darin Ragozzine; Damien Ségransan; C. G. Tinney; Margaret C. Turnbull; Robert A. Wittenmyer; Duncan J. Wright; Jason T. Wright

doi:10.3847/1538-3881/aba835

Transits of Known Planets Orbiting a Naked-Eye Star

Stephen R. Kane, Selçuk Yalçınkaya, Hugh P. Osborn, Paul A. Dalba, Louise D. Nielsen, Andrew Vanderburg, Teo Močnik, Natalie R. Hinkel, Colby Ostberg, Ekrem Murat Esmer, Stéphane Udry, Tara Fetherolf, Özgür Baştürk, George R. Ricker, Roland Vanderspek, David W. Latham, Sara Seager, Joshua N. Winn, Jon M. Jenkins, Romain AllartJeremy Bailey, Jacob L. Bean, Francois Bouchy, R. Paul Butler, Tiago L. Campante, Brad D. Carter, Tansu Daylan, Magali Deleuil, Rodrigo F. Diaz, Xavier Dumusque, David Ehrenreich, Jonathan Horner, Andrew W. Howard, Howard Isaacson, Hugh R. A. Jones, Martti H. Kristiansen, Christophe Lovis, Geoffrey W. Marcy, Maxime Marmier, Simon J. O'Toole, Francesco Pepe, Darin Ragozzine, Damien Ségransan, C. G. Tinney, Margaret C. Turnbull, Robert A. Wittenmyer, Duncan J. Wright, Jason T. Wright

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Abstract

Some of the most scientifically valuable transiting planets are those that were already known from radial velocity (RV) surveys. This is primarily because their orbits are well characterized and they preferentially orbit bright stars that are the targets of RV surveys. The Transiting Exoplanet Survey Satellite (TESS) provides an opportunity to survey most of the known exoplanet systems in a systematic fashion to detect possible transits of their planets. HD 136352 (Nu2 Lupi) is a naked-eye (V = 5.78) G-type main-sequence star that was discovered to host three planets with orbital periods of 11.6, 27.6, and 108.1 days via RV monitoring with the High Accuracy Radial velocity Planet Searcher (HARPS) spectrograph. We present the detection and characterization of transits for the two inner planets of the HD 136352 system, revealing radii of 1.482-0.056+0.058 R ⊕ and 2.608-0.077+0.078 R ⊕ for planets b and c, respectively. We combine new HARPS observations with RV data from the Keck/High Resolution Echelle Spectrometer and the Anglo-Australian Telescope, along with TESS photometry from Sector 12, to perform a complete analysis of the system parameters. The combined data analysis results in extracted bulk density values of ρb = 7.8-1.1+1.2 g cm-3 and ρc = 3.50-0.36+0.41 g cm-3 for planets b and c, respectively, thus placing them on either side of the radius valley. The combination of the multitransiting planet system, the bright host star, and the diversity of planetary interiors and atmospheres means this will likely become a cornerstone system for atmospheric and orbital characterization of small worlds.

Original language	English
Article number	129
Number of pages	10
Journal	The Astronomical Journal
Volume	160
Issue number	3
Early online date	21 Aug 2020
DOIs	https://doi.org/10.3847/1538-3881/aba835
Publication status	Published - 1 Sept 2020

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Kane, S. R., Yalçınkaya, S., Osborn, H. P., Dalba, P. A., Nielsen, L. D., Vanderburg, A., Močnik, T., Hinkel, N. R., Ostberg, C., Esmer, E. M., Udry, S., Fetherolf, T., Baştürk, Ö., Ricker, G. R., Vanderspek, R., Latham, D. W., Seager, S., Winn, J. N., Jenkins, J. M., ... Wright, J. T. (2020). Transits of Known Planets Orbiting a Naked-Eye Star. The Astronomical Journal, 160(3), Article 129. https://doi.org/10.3847/1538-3881/aba835

@article{f21cc13c52fd40179bd972731ba1baa5,

title = "Transits of Known Planets Orbiting a Naked-Eye Star",

abstract = "Some of the most scientifically valuable transiting planets are those that were already known from radial velocity (RV) surveys. This is primarily because their orbits are well characterized and they preferentially orbit bright stars that are the targets of RV surveys. The Transiting Exoplanet Survey Satellite (TESS) provides an opportunity to survey most of the known exoplanet systems in a systematic fashion to detect possible transits of their planets. HD 136352 (Nu2 Lupi) is a naked-eye (V = 5.78) G-type main-sequence star that was discovered to host three planets with orbital periods of 11.6, 27.6, and 108.1 days via RV monitoring with the High Accuracy Radial velocity Planet Searcher (HARPS) spectrograph. We present the detection and characterization of transits for the two inner planets of the HD 136352 system, revealing radii of 1.482-0.056+0.058 R ⊕ and 2.608-0.077+0.078 R ⊕ for planets b and c, respectively. We combine new HARPS observations with RV data from the Keck/High Resolution Echelle Spectrometer and the Anglo-Australian Telescope, along with TESS photometry from Sector 12, to perform a complete analysis of the system parameters. The combined data analysis results in extracted bulk density values of ρb = 7.8-1.1+1.2 g cm-3 and ρc = 3.50-0.36+0.41 g cm-3 for planets b and c, respectively, thus placing them on either side of the radius valley. The combination of the multitransiting planet system, the bright host star, and the diversity of planetary interiors and atmospheres means this will likely become a cornerstone system for atmospheric and orbital characterization of small worlds.",

author = "Kane, {Stephen R.} and Sel{\c c}uk Yal{\c c}ınkaya and Osborn, {Hugh P.} and Dalba, {Paul A.} and Nielsen, {Louise D.} and Andrew Vanderburg and Teo Mo{\v c}nik and Hinkel, {Natalie R.} and Colby Ostberg and Esmer, {Ekrem Murat} and St{\'e}phane Udry and Tara Fetherolf and {\"O}zg{\"u}r Ba{\c s}t{\"u}rk and Ricker, {George R.} and Roland Vanderspek and Latham, {David W.} and Sara Seager and Winn, {Joshua N.} and Jenkins, {Jon M.} and Romain Allart and Jeremy Bailey and Bean, {Jacob L.} and Francois Bouchy and Butler, {R. Paul} and Campante, {Tiago L.} and Carter, {Brad D.} and Tansu Daylan and Magali Deleuil and Diaz, {Rodrigo F.} and Xavier Dumusque and David Ehrenreich and Jonathan Horner and Howard, {Andrew W.} and Howard Isaacson and Jones, {Hugh R. A.} and Kristiansen, {Martti H.} and Christophe Lovis and Marcy, {Geoffrey W.} and Maxime Marmier and O'Toole, {Simon J.} and Francesco Pepe and Darin Ragozzine and Damien S{\'e}gransan and Tinney, {C. G.} and Turnbull, {Margaret C.} and Wittenmyer, {Robert A.} and Wright, {Duncan J.} and Wright, {Jason T.}",

year = "2020",

month = sep,

day = "1",

doi = "10.3847/1538-3881/aba835",

language = "English",

volume = "160",

journal = "The Astronomical Journal",

issn = "0004-6256",

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Kane, SR, Yalçınkaya, S, Osborn, HP, Dalba, PA, Nielsen, LD, Vanderburg, A, Močnik, T, Hinkel, NR, Ostberg, C, Esmer, EM, Udry, S, Fetherolf, T, Baştürk, Ö, Ricker, GR, Vanderspek, R, Latham, DW, Seager, S, Winn, JN, Jenkins, JM, Allart, R, Bailey, J, Bean, JL, Bouchy, F, Butler, RP, Campante, TL, Carter, BD, Daylan, T, Deleuil, M, Diaz, RF, Dumusque, X, Ehrenreich, D, Horner, J, Howard, AW, Isaacson, H, Jones, HRA, Kristiansen, MH, Lovis, C, Marcy, GW, Marmier, M, O'Toole, SJ, Pepe, F, Ragozzine, D, Ségransan, D, Tinney, CG, Turnbull, MC, Wittenmyer, RA, Wright, DJ & Wright, JT 2020, 'Transits of Known Planets Orbiting a Naked-Eye Star', The Astronomical Journal, vol. 160, no. 3, 129. https://doi.org/10.3847/1538-3881/aba835

TY - JOUR

T1 - Transits of Known Planets Orbiting a Naked-Eye Star

AU - Kane, Stephen R.

AU - Yalçınkaya, Selçuk

AU - Osborn, Hugh P.

AU - Dalba, Paul A.

AU - Nielsen, Louise D.

AU - Vanderburg, Andrew

AU - Močnik, Teo

AU - Hinkel, Natalie R.

AU - Ostberg, Colby

AU - Esmer, Ekrem Murat

AU - Udry, Stéphane

AU - Fetherolf, Tara

AU - Baştürk, Özgür

AU - Ricker, George R.

AU - Vanderspek, Roland

AU - Latham, David W.

AU - Seager, Sara

AU - Winn, Joshua N.

AU - Jenkins, Jon M.

AU - Allart, Romain

AU - Bailey, Jeremy

AU - Bean, Jacob L.

AU - Bouchy, Francois

AU - Butler, R. Paul

AU - Campante, Tiago L.

AU - Carter, Brad D.

AU - Daylan, Tansu

AU - Deleuil, Magali

AU - Diaz, Rodrigo F.

AU - Dumusque, Xavier

AU - Ehrenreich, David

AU - Horner, Jonathan

AU - Howard, Andrew W.

AU - Isaacson, Howard

AU - Jones, Hugh R. A.

AU - Kristiansen, Martti H.

AU - Lovis, Christophe

AU - Marcy, Geoffrey W.

AU - Marmier, Maxime

AU - O'Toole, Simon J.

AU - Pepe, Francesco

AU - Ragozzine, Darin

AU - Ségransan, Damien

AU - Tinney, C. G.

AU - Turnbull, Margaret C.

AU - Wittenmyer, Robert A.

AU - Wright, Duncan J.

AU - Wright, Jason T.

PY - 2020/9/1

Y1 - 2020/9/1

N2 - Some of the most scientifically valuable transiting planets are those that were already known from radial velocity (RV) surveys. This is primarily because their orbits are well characterized and they preferentially orbit bright stars that are the targets of RV surveys. The Transiting Exoplanet Survey Satellite (TESS) provides an opportunity to survey most of the known exoplanet systems in a systematic fashion to detect possible transits of their planets. HD 136352 (Nu2 Lupi) is a naked-eye (V = 5.78) G-type main-sequence star that was discovered to host three planets with orbital periods of 11.6, 27.6, and 108.1 days via RV monitoring with the High Accuracy Radial velocity Planet Searcher (HARPS) spectrograph. We present the detection and characterization of transits for the two inner planets of the HD 136352 system, revealing radii of 1.482-0.056+0.058 R ⊕ and 2.608-0.077+0.078 R ⊕ for planets b and c, respectively. We combine new HARPS observations with RV data from the Keck/High Resolution Echelle Spectrometer and the Anglo-Australian Telescope, along with TESS photometry from Sector 12, to perform a complete analysis of the system parameters. The combined data analysis results in extracted bulk density values of ρb = 7.8-1.1+1.2 g cm-3 and ρc = 3.50-0.36+0.41 g cm-3 for planets b and c, respectively, thus placing them on either side of the radius valley. The combination of the multitransiting planet system, the bright host star, and the diversity of planetary interiors and atmospheres means this will likely become a cornerstone system for atmospheric and orbital characterization of small worlds.

AB - Some of the most scientifically valuable transiting planets are those that were already known from radial velocity (RV) surveys. This is primarily because their orbits are well characterized and they preferentially orbit bright stars that are the targets of RV surveys. The Transiting Exoplanet Survey Satellite (TESS) provides an opportunity to survey most of the known exoplanet systems in a systematic fashion to detect possible transits of their planets. HD 136352 (Nu2 Lupi) is a naked-eye (V = 5.78) G-type main-sequence star that was discovered to host three planets with orbital periods of 11.6, 27.6, and 108.1 days via RV monitoring with the High Accuracy Radial velocity Planet Searcher (HARPS) spectrograph. We present the detection and characterization of transits for the two inner planets of the HD 136352 system, revealing radii of 1.482-0.056+0.058 R ⊕ and 2.608-0.077+0.078 R ⊕ for planets b and c, respectively. We combine new HARPS observations with RV data from the Keck/High Resolution Echelle Spectrometer and the Anglo-Australian Telescope, along with TESS photometry from Sector 12, to perform a complete analysis of the system parameters. The combined data analysis results in extracted bulk density values of ρb = 7.8-1.1+1.2 g cm-3 and ρc = 3.50-0.36+0.41 g cm-3 for planets b and c, respectively, thus placing them on either side of the radius valley. The combination of the multitransiting planet system, the bright host star, and the diversity of planetary interiors and atmospheres means this will likely become a cornerstone system for atmospheric and orbital characterization of small worlds.

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U2 - 10.3847/1538-3881/aba835

DO - 10.3847/1538-3881/aba835

M3 - Article

SN - 0004-6256

VL - 160

JO - The Astronomical Journal

JF - The Astronomical Journal

IS - 3

M1 - 129

ER -

Transits of Known Planets Orbiting a Naked-Eye Star

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