TESS-Keck Survey. V. Twin Sub-Neptunes Transiting the Nearby G Star HD 63935

Nicholas Scarsdale; Joseph M. Akana Murphy; Natalie M. Batalha; Ian J. M. Crossfield; Courtney D. Dressing; Benjamin Fulton; Andrew W. Howard; Daniel Huber; Howard Isaacson; Stephen R. Kane; Erik A. Petigura; Paul Robertson; Arpita Roy; Lauren M. Weiss; Corey Beard; Aida Behmard; Ashley Chontos; Jessie L. Christiansen; David R. Ciardi; Zachary R. Claytor; Karen A. Collins; Kevin Collins; Fei Dai; Paul A. Dalba; Diana Dragomir; Tara Fetherolf; Akihiko Fukui; Steven Giacalone; Erica J. Gonzales; Michelle L. Hill; Lea A. Hirsch; Eric L. N. Jensen; Molly R. Kosiarek; Jerome P. de Leon; Jack Lubin; Michael B. Lund; Rafael Luque; Andrew W. Mayo; Teo Mocnik; Mayuko Mori; Norio Narita; Grzegorz Nowak; Enric Palle; Markus Rabus; Lee J. Rosenthal; Ryan A. Rubenzahl; Joshua E. Schlieder; Avi Shporer; Keivan G. Stassun; Joe Twicken; Gavin Wang; Daniel A. Yahalomi; Jon Jenkins; David W. Latham; George R. Ricker; S. Seager; Roland Vanderspek; Joshua N. Winn

doi:10.3847/1538-3881/ac18cb

TESS-Keck Survey. V. Twin Sub-Neptunes Transiting the Nearby G Star HD 63935

Nicholas Scarsdale^*, Joseph M. Akana Murphy, Natalie M. Batalha, Ian J. M. Crossfield, Courtney D. Dressing, Benjamin Fulton, Andrew W. Howard, Daniel Huber, Howard Isaacson, Stephen R. Kane, Erik A. Petigura, Paul Robertson, Arpita Roy, Lauren M. Weiss, Corey Beard, Aida Behmard, Ashley Chontos, Jessie L. Christiansen, David R. Ciardi, Zachary R. ClaytorKaren A. Collins, Kevin Collins, Fei Dai, Paul A. Dalba, Diana Dragomir, Tara Fetherolf, Akihiko Fukui, Steven Giacalone, Erica J. Gonzales, Michelle L. Hill, Lea A. Hirsch, Eric L. N. Jensen, Molly R. Kosiarek, Jerome P. de Leon, Jack Lubin, Michael B. Lund, Rafael Luque, Andrew W. Mayo, Teo Mocnik, Mayuko Mori, Norio Narita, Grzegorz Nowak, Enric Palle, Markus Rabus, Lee J. Rosenthal, Ryan A. Rubenzahl, Joshua E. Schlieder, Avi Shporer, Keivan G. Stassun, Joe Twicken, Gavin Wang, Daniel A. Yahalomi, Jon Jenkins, David W. Latham, George R. Ricker, S. Seager, Roland Vanderspek, Joshua N. Winn

^*Corresponding author af dette arbejde

Astrofysik og Planetforskning

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › peer review

12 Citationer (Scopus)

Abstract

We present the discovery of two nearly identically sized sub-Neptune transiting planets orbiting HD 63935, a bright (V = 8.6 mag), Sun-like (T (eff) = 5560 K) star at 49 pc. TESS identified the first planet, HD 63935 b (TOI-509.01), in Sectors 7 and 34. We identified the second signal (HD 63935 c) in Keck High Resolution Echelle Spectrometer and Lick Automated Planet Finder radial velocity data as part of our follow-up campaign. It was subsequently confirmed with TESS photometry in Sector 34 as TOI-509.02. Our analysis of the photometric and radial velocity data yielded a robust detection of both planets with periods of 9.0600 +/- 0.007 and 21.40 +/- 0.0019 days, radii of 2.99 +/- 0.14 and 2.90 +/- 0.13 R (circle plus), and masses of 10.8 +/- 1.8 and 11.1 +/- 2.4 M (circle plus). We calculated densities for planets b and c consistent with a few percent of the planet mass in hydrogen/helium envelopes. We also describe our survey's efforts to choose the best targets for James Webb Space Telescope atmospheric follow-up. These efforts suggest that HD 63935 b has the most clearly visible atmosphere of its class. It is the best target for transmission spectroscopy (ranked by the transmission spectroscopy metric, a proxy for atmospheric observability) in the so far uncharacterized parameter space comprising sub-Neptune-sized (2.6 R (circle plus) < R (p) < 4 R (circle plus)), moderately irradiated (100 F (circle plus) < F (p) < 1000 F (circle plus)) planets around G stars. Planet c is also a viable target for transmission spectroscopy, and given the indistinguishable masses and radii of the two planets, the system serves as a natural laboratory for examining the processes that shape the evolution of sub-Neptune planets.

Originalsprog	Engelsk
Artikelnummer	215
Tidsskrift	Astronomical Journal
Vol/bind	162
Udgave nummer	5
Antal sider	17
ISSN	0004-6256
DOI	https://doi.org/10.3847/1538-3881/ac18cb
Status	Udgivet - 26 okt. 2021

Adgang til dokumentet

10.3847/1538-3881/ac18cb

https://arxiv.org/pdf/2110.06885.pdf

Citationsformater

Scarsdale, N., Murphy, J. M. A., Batalha, N. M., Crossfield, I. J. M., Dressing, C. D., Fulton, B., Howard, A. W., Huber, D., Isaacson, H., Kane, S. R., Petigura, E. A., Robertson, P., Roy, A., Weiss, L. M., Beard, C., Behmard, A., Chontos, A., Christiansen, J. L., Ciardi, D. R., ... Winn, J. N. (2021). TESS-Keck Survey. V. Twin Sub-Neptunes Transiting the Nearby G Star HD 63935. Astronomical Journal, 162(5), [215]. https://doi.org/10.3847/1538-3881/ac18cb

TESS-Keck Survey. V. Twin Sub-Neptunes Transiting the Nearby G Star HD 63935. / Scarsdale, Nicholas; Murphy, Joseph M. Akana; Batalha, Natalie M.; Crossfield, Ian J. M.; Dressing, Courtney D.; Fulton, Benjamin; Howard, Andrew W.; Huber, Daniel; Isaacson, Howard; Kane, Stephen R.; Petigura, Erik A.; Robertson, Paul; Roy, Arpita; Weiss, Lauren M.; Beard, Corey; Behmard, Aida; Chontos, Ashley; Christiansen, Jessie L.; Ciardi, David R.; Claytor, Zachary R.; Collins, Karen A.; Collins, Kevin; Dai, Fei; Dalba, Paul A.; Dragomir, Diana; Fetherolf, Tara; Fukui, Akihiko; Giacalone, Steven; Gonzales, Erica J.; Hill, Michelle L.; Hirsch, Lea A.; Jensen, Eric L. N.; Kosiarek, Molly R.; de Leon, Jerome P.; Lubin, Jack; Lund, Michael B.; Luque, Rafael; Mayo, Andrew W.; Mocnik, Teo; Mori, Mayuko; Narita, Norio; Nowak, Grzegorz; Palle, Enric; Rabus, Markus; Rosenthal, Lee J.; Rubenzahl, Ryan A.; Schlieder, Joshua E.; Shporer, Avi; Stassun, Keivan G.; Twicken, Joe; Wang, Gavin; Yahalomi, Daniel A.; Jenkins, Jon; Latham, David W.; Ricker, George R.; Seager, S.; Vanderspek, Roland; Winn, Joshua N.

I: Astronomical Journal, Bind 162, Nr. 5, 215, 26.10.2021.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › peer review

Scarsdale, N, Murphy, JMA, Batalha, NM, Crossfield, IJM, Dressing, CD, Fulton, B, Howard, AW, Huber, D, Isaacson, H, Kane, SR, Petigura, EA, Robertson, P, Roy, A, Weiss, LM, Beard, C, Behmard, A, Chontos, A, Christiansen, JL, Ciardi, DR, Claytor, ZR, Collins, KA, Collins, K, Dai, F, Dalba, PA, Dragomir, D, Fetherolf, T, Fukui, A, Giacalone, S, Gonzales, EJ, Hill, ML, Hirsch, LA, Jensen, ELN, Kosiarek, MR, de Leon, JP, Lubin, J, Lund, MB, Luque, R, Mayo, AW, Mocnik, T, Mori, M, Narita, N, Nowak, G, Palle, E, Rabus, M, Rosenthal, LJ, Rubenzahl, RA, Schlieder, JE, Shporer, A, Stassun, KG, Twicken, J, Wang, G, Yahalomi, DA, Jenkins, J, Latham, DW, Ricker, GR, Seager, S, Vanderspek, R & Winn, JN 2021, 'TESS-Keck Survey. V. Twin Sub-Neptunes Transiting the Nearby G Star HD 63935', Astronomical Journal, bind 162, nr. 5, 215. https://doi.org/10.3847/1538-3881/ac18cb

Scarsdale, Nicholas ; Murphy, Joseph M. Akana ; Batalha, Natalie M. ; Crossfield, Ian J. M. ; Dressing, Courtney D. ; Fulton, Benjamin ; Howard, Andrew W. ; Huber, Daniel ; Isaacson, Howard ; Kane, Stephen R. ; Petigura, Erik A. ; Robertson, Paul ; Roy, Arpita ; Weiss, Lauren M. ; Beard, Corey ; Behmard, Aida ; Chontos, Ashley ; Christiansen, Jessie L. ; Ciardi, David R. ; Claytor, Zachary R. ; Collins, Karen A. ; Collins, Kevin ; Dai, Fei ; Dalba, Paul A. ; Dragomir, Diana ; Fetherolf, Tara ; Fukui, Akihiko ; Giacalone, Steven ; Gonzales, Erica J. ; Hill, Michelle L. ; Hirsch, Lea A. ; Jensen, Eric L. N. ; Kosiarek, Molly R. ; de Leon, Jerome P. ; Lubin, Jack ; Lund, Michael B. ; Luque, Rafael ; Mayo, Andrew W. ; Mocnik, Teo ; Mori, Mayuko ; Narita, Norio ; Nowak, Grzegorz ; Palle, Enric ; Rabus, Markus ; Rosenthal, Lee J. ; Rubenzahl, Ryan A. ; Schlieder, Joshua E. ; Shporer, Avi ; Stassun, Keivan G. ; Twicken, Joe ; Wang, Gavin ; Yahalomi, Daniel A. ; Jenkins, Jon ; Latham, David W. ; Ricker, George R. ; Seager, S. ; Vanderspek, Roland ; Winn, Joshua N. / TESS-Keck Survey. V. Twin Sub-Neptunes Transiting the Nearby G Star HD 63935. I: Astronomical Journal. 2021 ; Bind 162, Nr. 5.

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title = "TESS-Keck Survey. V. Twin Sub-Neptunes Transiting the Nearby G Star HD 63935",

abstract = "We present the discovery of two nearly identically sized sub-Neptune transiting planets orbiting HD 63935, a bright (V = 8.6 mag), Sun-like (T (eff) = 5560 K) star at 49 pc. TESS identified the first planet, HD 63935 b (TOI-509.01), in Sectors 7 and 34. We identified the second signal (HD 63935 c) in Keck High Resolution Echelle Spectrometer and Lick Automated Planet Finder radial velocity data as part of our follow-up campaign. It was subsequently confirmed with TESS photometry in Sector 34 as TOI-509.02. Our analysis of the photometric and radial velocity data yielded a robust detection of both planets with periods of 9.0600 +/- 0.007 and 21.40 +/- 0.0019 days, radii of 2.99 +/- 0.14 and 2.90 +/- 0.13 R (circle plus), and masses of 10.8 +/- 1.8 and 11.1 +/- 2.4 M (circle plus). We calculated densities for planets b and c consistent with a few percent of the planet mass in hydrogen/helium envelopes. We also describe our survey's efforts to choose the best targets for James Webb Space Telescope atmospheric follow-up. These efforts suggest that HD 63935 b has the most clearly visible atmosphere of its class. It is the best target for transmission spectroscopy (ranked by the transmission spectroscopy metric, a proxy for atmospheric observability) in the so far uncharacterized parameter space comprising sub-Neptune-sized (2.6 R (circle plus) < R (p) < 4 R (circle plus)), moderately irradiated (100 F (circle plus) < F (p) < 1000 F (circle plus)) planets around G stars. Planet c is also a viable target for transmission spectroscopy, and given the indistinguishable masses and radii of the two planets, the system serves as a natural laboratory for examining the processes that shape the evolution of sub-Neptune planets.",

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TY - JOUR

T1 - TESS-Keck Survey. V. Twin Sub-Neptunes Transiting the Nearby G Star HD 63935

AU - Scarsdale, Nicholas

AU - Murphy, Joseph M. Akana

AU - Batalha, Natalie M.

AU - Crossfield, Ian J. M.

AU - Dressing, Courtney D.

AU - Fulton, Benjamin

AU - Howard, Andrew W.

AU - Huber, Daniel

AU - Isaacson, Howard

AU - Kane, Stephen R.

AU - Petigura, Erik A.

AU - Robertson, Paul

AU - Roy, Arpita

AU - Weiss, Lauren M.

AU - Beard, Corey

AU - Behmard, Aida

AU - Chontos, Ashley

AU - Christiansen, Jessie L.

AU - Ciardi, David R.

AU - Claytor, Zachary R.

AU - Collins, Karen A.

AU - Collins, Kevin

AU - Dai, Fei

AU - Dalba, Paul A.

AU - Dragomir, Diana

AU - Fetherolf, Tara

AU - Fukui, Akihiko

AU - Giacalone, Steven

AU - Gonzales, Erica J.

AU - Hill, Michelle L.

AU - Hirsch, Lea A.

AU - Jensen, Eric L. N.

AU - Kosiarek, Molly R.

AU - de Leon, Jerome P.

AU - Lubin, Jack

AU - Lund, Michael B.

AU - Luque, Rafael

AU - Mayo, Andrew W.

AU - Mocnik, Teo

AU - Mori, Mayuko

AU - Narita, Norio

AU - Nowak, Grzegorz

AU - Palle, Enric

AU - Rabus, Markus

AU - Rosenthal, Lee J.

AU - Rubenzahl, Ryan A.

AU - Schlieder, Joshua E.

AU - Shporer, Avi

AU - Stassun, Keivan G.

AU - Twicken, Joe

AU - Wang, Gavin

AU - Yahalomi, Daniel A.

AU - Jenkins, Jon

AU - Latham, David W.

AU - Ricker, George R.

AU - Seager, S.

AU - Vanderspek, Roland

AU - Winn, Joshua N.

PY - 2021/10/26

Y1 - 2021/10/26

N2 - We present the discovery of two nearly identically sized sub-Neptune transiting planets orbiting HD 63935, a bright (V = 8.6 mag), Sun-like (T (eff) = 5560 K) star at 49 pc. TESS identified the first planet, HD 63935 b (TOI-509.01), in Sectors 7 and 34. We identified the second signal (HD 63935 c) in Keck High Resolution Echelle Spectrometer and Lick Automated Planet Finder radial velocity data as part of our follow-up campaign. It was subsequently confirmed with TESS photometry in Sector 34 as TOI-509.02. Our analysis of the photometric and radial velocity data yielded a robust detection of both planets with periods of 9.0600 +/- 0.007 and 21.40 +/- 0.0019 days, radii of 2.99 +/- 0.14 and 2.90 +/- 0.13 R (circle plus), and masses of 10.8 +/- 1.8 and 11.1 +/- 2.4 M (circle plus). We calculated densities for planets b and c consistent with a few percent of the planet mass in hydrogen/helium envelopes. We also describe our survey's efforts to choose the best targets for James Webb Space Telescope atmospheric follow-up. These efforts suggest that HD 63935 b has the most clearly visible atmosphere of its class. It is the best target for transmission spectroscopy (ranked by the transmission spectroscopy metric, a proxy for atmospheric observability) in the so far uncharacterized parameter space comprising sub-Neptune-sized (2.6 R (circle plus) < R (p) < 4 R (circle plus)), moderately irradiated (100 F (circle plus) < F (p) < 1000 F (circle plus)) planets around G stars. Planet c is also a viable target for transmission spectroscopy, and given the indistinguishable masses and radii of the two planets, the system serves as a natural laboratory for examining the processes that shape the evolution of sub-Neptune planets.

AB - We present the discovery of two nearly identically sized sub-Neptune transiting planets orbiting HD 63935, a bright (V = 8.6 mag), Sun-like (T (eff) = 5560 K) star at 49 pc. TESS identified the first planet, HD 63935 b (TOI-509.01), in Sectors 7 and 34. We identified the second signal (HD 63935 c) in Keck High Resolution Echelle Spectrometer and Lick Automated Planet Finder radial velocity data as part of our follow-up campaign. It was subsequently confirmed with TESS photometry in Sector 34 as TOI-509.02. Our analysis of the photometric and radial velocity data yielded a robust detection of both planets with periods of 9.0600 +/- 0.007 and 21.40 +/- 0.0019 days, radii of 2.99 +/- 0.14 and 2.90 +/- 0.13 R (circle plus), and masses of 10.8 +/- 1.8 and 11.1 +/- 2.4 M (circle plus). We calculated densities for planets b and c consistent with a few percent of the planet mass in hydrogen/helium envelopes. We also describe our survey's efforts to choose the best targets for James Webb Space Telescope atmospheric follow-up. These efforts suggest that HD 63935 b has the most clearly visible atmosphere of its class. It is the best target for transmission spectroscopy (ranked by the transmission spectroscopy metric, a proxy for atmospheric observability) in the so far uncharacterized parameter space comprising sub-Neptune-sized (2.6 R (circle plus) < R (p) < 4 R (circle plus)), moderately irradiated (100 F (circle plus) < F (p) < 1000 F (circle plus)) planets around G stars. Planet c is also a viable target for transmission spectroscopy, and given the indistinguishable masses and radii of the two planets, the system serves as a natural laboratory for examining the processes that shape the evolution of sub-Neptune planets.

KW - ERROR-CORRECTION

KW - PLANET

KW - LIGHT

KW - EXOPLANETS

KW - TELESCOPE

KW - DENSITY

KW - II.

KW - I.

U2 - 10.3847/1538-3881/ac18cb

DO - 10.3847/1538-3881/ac18cb

M3 - Journal article

VL - 162

JO - The Astronomical Journal

JF - The Astronomical Journal

SN - 0004-6256

IS - 5

M1 - 215

ER -