Physical Parameters of the Multiplanet Systems HD 106315 and GJ 9827*dagger

Research output: Contribution to journal › Journal article › Research › peer-review

Standard

Physical Parameters of the Multiplanet Systems HD 106315 and GJ 9827*dagger. / Kosiarek, Molly R.; Berardo, David A.; Crossfield, Ian J. M.; Laguna, Cesar; Piaulet, Caroline; Akana Murphy, Joseph M.; Howell, Steve B.; Henry, Gregory W.; Isaacson, Howard; Fulton, Benjamin; Weiss, Lauren M.; Petigura, Erik A.; Behmard, Aida; Hirsch, Lea A.; Teske, Johanna; Burt, Jennifer A.; Mills, Sean M.; Chontos, Ashley; Mocnik, Teo; Howard, Andrew W.; Werner, Michael; Livingston, John H.; Krick, Jessica; Beichman, Charles; Gorjian, Varoujan; Kreidberg, Laura; Morley, Caroline; Christiansen, Jessie L.; Morales, Farisa Y.; Scott, Nicholas J.; Crane, Jeffrey D.; Wang, Sharon Xuesong; Shectman, Stephen A.; Rosenthal, Lee J.; Grunblatt, Samuel K.; Rubenzahl, Ryan A.; Dalba, Paul A.; Giacalone, Steven; Villanueva, Chiara Dane; Liu, Qingtian; Dai, Fei; Hill, Michelle L.; Rice, Malena; Kane, Stephen R.; Mayo, Andrew W.

In: Astronomical Journal, Vol. 161, No. 1, 47, 2021.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Kosiarek, MR, Berardo, DA, Crossfield, IJM, Laguna, C, Piaulet, C, Akana Murphy, JM, Howell, SB, Henry, GW, Isaacson, H, Fulton, B, Weiss, LM, Petigura, EA, Behmard, A, Hirsch, LA, Teske, J, Burt, JA, Mills, SM, Chontos, A, Mocnik, T, Howard, AW, Werner, M, Livingston, JH, Krick, J, Beichman, C, Gorjian, V, Kreidberg, L, Morley, C, Christiansen, JL, Morales, FY, Scott, NJ, Crane, JD, Wang, SX, Shectman, SA, Rosenthal, LJ, Grunblatt, SK, Rubenzahl, RA, Dalba, PA, Giacalone, S, Villanueva, CD, Liu, Q, Dai, F, Hill, ML, Rice, M, Kane, SR & Mayo, AW 2021, 'Physical Parameters of the Multiplanet Systems HD 106315 and GJ 9827*dagger', Astronomical Journal, vol. 161, no. 1, 47. https://doi.org/10.3847/1538-3881/abca39

APA

Kosiarek, M. R., Berardo, D. A., Crossfield, I. J. M., Laguna, C., Piaulet, C., Akana Murphy, J. M., Howell, S. B., Henry, G. W., Isaacson, H., Fulton, B., Weiss, L. M., Petigura, E. A., Behmard, A., Hirsch, L. A., Teske, J., Burt, J. A., Mills, S. M., Chontos, A., Mocnik, T., ... Mayo, A. W. (2021). Physical Parameters of the Multiplanet Systems HD 106315 and GJ 9827*dagger. Astronomical Journal, 161(1), [47]. https://doi.org/10.3847/1538-3881/abca39

Vancouver

Kosiarek MR, Berardo DA, Crossfield IJM, Laguna C, Piaulet C, Akana Murphy JM et al. Physical Parameters of the Multiplanet Systems HD 106315 and GJ 9827*dagger. Astronomical Journal. 2021;161(1). 47. https://doi.org/10.3847/1538-3881/abca39

Author

Kosiarek, Molly R. ; Berardo, David A. ; Crossfield, Ian J. M. ; Laguna, Cesar ; Piaulet, Caroline ; Akana Murphy, Joseph M. ; Howell, Steve B. ; Henry, Gregory W. ; Isaacson, Howard ; Fulton, Benjamin ; Weiss, Lauren M. ; Petigura, Erik A. ; Behmard, Aida ; Hirsch, Lea A. ; Teske, Johanna ; Burt, Jennifer A. ; Mills, Sean M. ; Chontos, Ashley ; Mocnik, Teo ; Howard, Andrew W. ; Werner, Michael ; Livingston, John H. ; Krick, Jessica ; Beichman, Charles ; Gorjian, Varoujan ; Kreidberg, Laura ; Morley, Caroline ; Christiansen, Jessie L. ; Morales, Farisa Y. ; Scott, Nicholas J. ; Crane, Jeffrey D. ; Wang, Sharon Xuesong ; Shectman, Stephen A. ; Rosenthal, Lee J. ; Grunblatt, Samuel K. ; Rubenzahl, Ryan A. ; Dalba, Paul A. ; Giacalone, Steven ; Villanueva, Chiara Dane ; Liu, Qingtian ; Dai, Fei ; Hill, Michelle L. ; Rice, Malena ; Kane, Stephen R. ; Mayo, Andrew W. / Physical Parameters of the Multiplanet Systems HD 106315 and GJ 9827*dagger. In: Astronomical Journal. 2021 ; Vol. 161, No. 1.

Bibtex

@article{91018e3317a34e57b399b3c40041dedb,
title = "Physical Parameters of the Multiplanet Systems HD 106315 and GJ 9827*dagger",
abstract = "HD 106315 and GJ 9827 are two bright, nearby stars that host multiple super-Earths and sub-Neptunes discovered by K2 that are well suited for atmospheric characterization. We refined the planets' ephemerides through Spitzer transits, enabling accurate transit prediction required for future atmospheric characterization through transmission spectroscopy. Through a multiyear high-cadence observing campaign with Keck/High Resolution Echelle Spectrometer and Magellan/Planet Finder Spectrograph, we improved the planets' mass measurements in anticipation of Hubble Space Telescope transmission spectroscopy. For GJ 9827, we modeled activity-induced radial velocity signals with a Gaussian process informed by the Calcium II H&K lines in order to more accurately model the effect of stellar noise on our data. We measured planet masses of M-b = 4.87 0.37 M-circle plus, M-c = 1.92 0.49 M-circle plus, and M-d = 3.42 0.62 M-circle plus. For HD 106315, we found that such activity radial velocity decorrelation was not effective due to the reduced presence of spots and speculate that this may extend to other hot stars as well (T-eff > 6200 K). We measured planet masses of M-b = 10.5 3.1 M-circle plus and M-c = 12.0 3.8 M-circle plus. We investigated all of the planets' compositions through comparison of their masses and radii to a range of interior models. GJ 9827 b and GJ 9827 c are both consistent with a 50/50 rock-iron composition, GJ 9827 d and HD 106315 b both require additional volatiles and are consistent with moderate amounts of water or hydrogen/helium, and HD 106315 c is consistent with a similar to 10% hydrogen/helium envelope surrounding an Earth-like rock and iron core.",
keywords = "Radial velocity, Exoplanets, Mini Neptunes, Transit photometry, Gaussian Processes regression, Super Earths, PRECISION, PLANETS, ARRAY",
author = "Kosiarek, {Molly R.} and Berardo, {David A.} and Crossfield, {Ian J. M.} and Cesar Laguna and Caroline Piaulet and {Akana Murphy}, {Joseph M.} and Howell, {Steve B.} and Henry, {Gregory W.} and Howard Isaacson and Benjamin Fulton and Weiss, {Lauren M.} and Petigura, {Erik A.} and Aida Behmard and Hirsch, {Lea A.} and Johanna Teske and Burt, {Jennifer A.} and Mills, {Sean M.} and Ashley Chontos and Teo Mocnik and Howard, {Andrew W.} and Michael Werner and Livingston, {John H.} and Jessica Krick and Charles Beichman and Varoujan Gorjian and Laura Kreidberg and Caroline Morley and Christiansen, {Jessie L.} and Morales, {Farisa Y.} and Scott, {Nicholas J.} and Crane, {Jeffrey D.} and Wang, {Sharon Xuesong} and Shectman, {Stephen A.} and Rosenthal, {Lee J.} and Grunblatt, {Samuel K.} and Rubenzahl, {Ryan A.} and Dalba, {Paul A.} and Steven Giacalone and Villanueva, {Chiara Dane} and Qingtian Liu and Fei Dai and Hill, {Michelle L.} and Malena Rice and Kane, {Stephen R.} and Mayo, {Andrew W.}",
year = "2021",
doi = "10.3847/1538-3881/abca39",
language = "English",
volume = "161",
journal = "The Astronomical Journal",
issn = "0004-6256",
publisher = "Institute of Physics Publishing, Inc",
number = "1",

}

RIS

TY - JOUR

T1 - Physical Parameters of the Multiplanet Systems HD 106315 and GJ 9827*dagger

AU - Kosiarek, Molly R.

AU - Berardo, David A.

AU - Crossfield, Ian J. M.

AU - Laguna, Cesar

AU - Piaulet, Caroline

AU - Akana Murphy, Joseph M.

AU - Howell, Steve B.

AU - Henry, Gregory W.

AU - Isaacson, Howard

AU - Fulton, Benjamin

AU - Weiss, Lauren M.

AU - Petigura, Erik A.

AU - Behmard, Aida

AU - Hirsch, Lea A.

AU - Teske, Johanna

AU - Burt, Jennifer A.

AU - Mills, Sean M.

AU - Chontos, Ashley

AU - Mocnik, Teo

AU - Howard, Andrew W.

AU - Werner, Michael

AU - Livingston, John H.

AU - Krick, Jessica

AU - Beichman, Charles

AU - Gorjian, Varoujan

AU - Kreidberg, Laura

AU - Morley, Caroline

AU - Christiansen, Jessie L.

AU - Morales, Farisa Y.

AU - Scott, Nicholas J.

AU - Crane, Jeffrey D.

AU - Wang, Sharon Xuesong

AU - Shectman, Stephen A.

AU - Rosenthal, Lee J.

AU - Grunblatt, Samuel K.

AU - Rubenzahl, Ryan A.

AU - Dalba, Paul A.

AU - Giacalone, Steven

AU - Villanueva, Chiara Dane

AU - Liu, Qingtian

AU - Dai, Fei

AU - Hill, Michelle L.

AU - Rice, Malena

AU - Kane, Stephen R.

AU - Mayo, Andrew W.

PY - 2021

Y1 - 2021

N2 - HD 106315 and GJ 9827 are two bright, nearby stars that host multiple super-Earths and sub-Neptunes discovered by K2 that are well suited for atmospheric characterization. We refined the planets' ephemerides through Spitzer transits, enabling accurate transit prediction required for future atmospheric characterization through transmission spectroscopy. Through a multiyear high-cadence observing campaign with Keck/High Resolution Echelle Spectrometer and Magellan/Planet Finder Spectrograph, we improved the planets' mass measurements in anticipation of Hubble Space Telescope transmission spectroscopy. For GJ 9827, we modeled activity-induced radial velocity signals with a Gaussian process informed by the Calcium II H&K lines in order to more accurately model the effect of stellar noise on our data. We measured planet masses of M-b = 4.87 0.37 M-circle plus, M-c = 1.92 0.49 M-circle plus, and M-d = 3.42 0.62 M-circle plus. For HD 106315, we found that such activity radial velocity decorrelation was not effective due to the reduced presence of spots and speculate that this may extend to other hot stars as well (T-eff > 6200 K). We measured planet masses of M-b = 10.5 3.1 M-circle plus and M-c = 12.0 3.8 M-circle plus. We investigated all of the planets' compositions through comparison of their masses and radii to a range of interior models. GJ 9827 b and GJ 9827 c are both consistent with a 50/50 rock-iron composition, GJ 9827 d and HD 106315 b both require additional volatiles and are consistent with moderate amounts of water or hydrogen/helium, and HD 106315 c is consistent with a similar to 10% hydrogen/helium envelope surrounding an Earth-like rock and iron core.

AB - HD 106315 and GJ 9827 are two bright, nearby stars that host multiple super-Earths and sub-Neptunes discovered by K2 that are well suited for atmospheric characterization. We refined the planets' ephemerides through Spitzer transits, enabling accurate transit prediction required for future atmospheric characterization through transmission spectroscopy. Through a multiyear high-cadence observing campaign with Keck/High Resolution Echelle Spectrometer and Magellan/Planet Finder Spectrograph, we improved the planets' mass measurements in anticipation of Hubble Space Telescope transmission spectroscopy. For GJ 9827, we modeled activity-induced radial velocity signals with a Gaussian process informed by the Calcium II H&K lines in order to more accurately model the effect of stellar noise on our data. We measured planet masses of M-b = 4.87 0.37 M-circle plus, M-c = 1.92 0.49 M-circle plus, and M-d = 3.42 0.62 M-circle plus. For HD 106315, we found that such activity radial velocity decorrelation was not effective due to the reduced presence of spots and speculate that this may extend to other hot stars as well (T-eff > 6200 K). We measured planet masses of M-b = 10.5 3.1 M-circle plus and M-c = 12.0 3.8 M-circle plus. We investigated all of the planets' compositions through comparison of their masses and radii to a range of interior models. GJ 9827 b and GJ 9827 c are both consistent with a 50/50 rock-iron composition, GJ 9827 d and HD 106315 b both require additional volatiles and are consistent with moderate amounts of water or hydrogen/helium, and HD 106315 c is consistent with a similar to 10% hydrogen/helium envelope surrounding an Earth-like rock and iron core.

KW - Radial velocity

KW - Exoplanets

KW - Mini Neptunes

KW - Transit photometry

KW - Gaussian Processes regression

KW - Super Earths

KW - PRECISION

KW - PLANETS

KW - ARRAY

U2 - 10.3847/1538-3881/abca39

DO - 10.3847/1538-3881/abca39

M3 - Journal article

VL - 161

JO - The Astronomical Journal

JF - The Astronomical Journal

SN - 0004-6256

IS - 1

M1 - 47

ER -

ID: 256162421