A hot mini-Neptune in the radius valley orbiting solar analogue HD 110113

H. P. Osborn; D. J. Armstrong; V. Adibekyan; K. A. Collins; E. Delgado-Mena; S. B. Howell; C. Hellier; G. W. King; J. Lillo-Box; L. D. Nielsen; J. F. Otegi; N. C. Santos; C. Ziegler; D. R. Anderson; C. Briceno; C. Burke; D. Bayliss; D. Barrado; E. M. Bryant; D. J.A. Brown; S. C.C. Barros; F. Bouchy; D. A. Caldwell; D. M. Conti; R. F. Diaz; D. Dragomir; M. Deleuil; O. D.S. Demangeon; C. Dorn; T. Daylan; P. Figueira; R. Helled; S. Hoyer; J. M. Jenkins; E. L.N. Jensen; D. W. Latham; N. Law; D. R. Louie; A. W. Mann; A. Osborn; D. L. Pollacco; D. R. Rodriguez; B. V. Rackham; G. Ricker; N. J. Scott; S. G. Sousa; S. Seager; K. G. Stassun; J. C. Smith; P. Strm; S. Udry; J. Villasenor; R. Vanderspek; R. West; P. J. Wheatley; J. N. Winn

doi:10.1093/mnras/stab182

A hot mini-Neptune in the radius valley orbiting solar analogue HD 110113

H. P. Osborn, D. J. Armstrong, V. Adibekyan, K. A. Collins, E. Delgado-Mena, S. B. Howell, C. Hellier, G. W. King, J. Lillo-Box, L. D. Nielsen, J. F. Otegi, N. C. Santos, C. Ziegler, D. R. Anderson, C. Briceno, C. Burke, D. Bayliss, D. Barrado, E. M. Bryant, D. J.A. BrownS. C.C. Barros, F. Bouchy, D. A. Caldwell, D. M. Conti, R. F. Diaz, D. Dragomir, M. Deleuil, O. D.S. Demangeon, C. Dorn, T. Daylan, P. Figueira, R. Helled, S. Hoyer, J. M. Jenkins, E. L.N. Jensen, D. W. Latham, N. Law, D. R. Louie, A. W. Mann, A. Osborn, D. L. Pollacco, D. R. Rodriguez, B. V. Rackham, G. Ricker, N. J. Scott, S. G. Sousa, S. Seager, K. G. Stassun, J. C. Smith, P. Strm, S. Udry, J. Villasenor, R. Vanderspek, R. West, P. J. Wheatley, J. N. Winn

Astrophysical Sciences

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Abstract

We report the discovery of HD 110113 b (TESS object of interest-755.01), a transiting mini-Neptune exoplanet on a 2.5-d orbit around the solar-analogue HD 110113 (Teff = 5730 K). Using TESS photometry and High Accuracy Radial velocity Planet Searcher (HARPS) radial velocities gathered by the NCORES program, we find that HD 110113 b has a radius of 2.05 ± 0.12 R⊕ and a mass of 4.55 ± 0.62 M⊕. The resulting density of $2.90^{+0.75}_{-0.59}$ g cm-3 is significantly lower than would be expected from a pure-rock world; therefore HD 110113 b must be a mini-Neptune with a significant volatile atmosphere. The high incident flux places it within the so-called radius valley; however, HD 110113 b was able to hold on to a substantial (0.1-1 per cent) H-He atmosphere over its ∼4 Gyr lifetime. Through a novel simultaneous Gaussian process fit to multiple activity indicators, we were also able to fit for the strong stellar rotation signal with period 20.8 ± 1.2 d from the RVs and confirm an additional non-transiting planet, HD 110113 c, which has a mass of 10.5 ± 1.2 M⊕ and a period of $6.744^{+0.008}_{-0.009}$ d.

Original language	English (US)
Pages (from-to)	4842-4857
Number of pages	16
Journal	Monthly Notices of the Royal Astronomical Society
Volume	502
Issue number	4
DOIs	https://doi.org/10.1093/mnras/stab182
State	Published - Apr 1 2021

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

planets and satellites: detection
stars: individual: HD110113

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10.1093/mnras/stab182

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Osborn, H. P., Armstrong, D. J., Adibekyan, V., Collins, K. A., Delgado-Mena, E., Howell, S. B., Hellier, C., King, G. W., Lillo-Box, J., Nielsen, L. D., Otegi, J. F., Santos, N. C., Ziegler, C., Anderson, D. R., Briceno, C., Burke, C., Bayliss, D., Barrado, D., Bryant, E. M., ... Winn, J. N. (2021). A hot mini-Neptune in the radius valley orbiting solar analogue HD 110113. Monthly Notices of the Royal Astronomical Society, 502(4), 4842-4857. https://doi.org/10.1093/mnras/stab182

@article{e61d45a11c8144f8b0d106b07e2782cc,

title = "A hot mini-Neptune in the radius valley orbiting solar analogue HD 110113",

abstract = "We report the discovery of HD 110113 b (TESS object of interest-755.01), a transiting mini-Neptune exoplanet on a 2.5-d orbit around the solar-analogue HD 110113 (Teff = 5730 K). Using TESS photometry and High Accuracy Radial velocity Planet Searcher (HARPS) radial velocities gathered by the NCORES program, we find that HD 110113 b has a radius of 2.05 ± 0.12 R⊕ and a mass of 4.55 ± 0.62 M⊕. The resulting density of $2.90^{+0.75}_{-0.59}$ g cm-3 is significantly lower than would be expected from a pure-rock world; therefore HD 110113 b must be a mini-Neptune with a significant volatile atmosphere. The high incident flux places it within the so-called radius valley; however, HD 110113 b was able to hold on to a substantial (0.1-1 per cent) H-He atmosphere over its ∼4 Gyr lifetime. Through a novel simultaneous Gaussian process fit to multiple activity indicators, we were also able to fit for the strong stellar rotation signal with period 20.8 ± 1.2 d from the RVs and confirm an additional non-transiting planet, HD 110113 c, which has a mass of 10.5 ± 1.2 M⊕ and a period of $6.744^{+0.008}_{-0.009}$ d.",

keywords = "planets and satellites: detection, stars: individual: HD110113",

author = "Osborn, {H. P.} and Armstrong, {D. J.} and V. Adibekyan and Collins, {K. A.} and E. Delgado-Mena and Howell, {S. B.} and C. Hellier and King, {G. W.} and J. Lillo-Box and Nielsen, {L. D.} and Otegi, {J. F.} and Santos, {N. C.} and C. Ziegler and Anderson, {D. R.} and C. Briceno and C. Burke and D. Bayliss and D. Barrado and Bryant, {E. M.} and Brown, {D. J.A.} and Barros, {S. C.C.} and F. Bouchy and Caldwell, {D. A.} and Conti, {D. M.} and Diaz, {R. F.} and D. Dragomir and M. Deleuil and Demangeon, {O. D.S.} and C. Dorn and T. Daylan and P. Figueira and R. Helled and S. Hoyer and Jenkins, {J. M.} and Jensen, {E. L.N.} and Latham, {D. W.} and N. Law and Louie, {D. R.} and Mann, {A. W.} and A. Osborn and Pollacco, {D. L.} and Rodriguez, {D. R.} and Rackham, {B. V.} and G. Ricker and Scott, {N. J.} and Sousa, {S. G.} and S. Seager and Stassun, {K. G.} and Smith, {J. C.} and P. Strm and S. Udry and J. Villasenor and R. Vanderspek and R. West and Wheatley, {P. J.} and Winn, {J. N.}",

note = "Publisher Copyright: {\textcopyright} 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.",

year = "2021",

month = apr,

day = "1",

doi = "10.1093/mnras/stab182",

language = "English (US)",

volume = "502",

pages = "4842--4857",

journal = "Monthly Notices of the Royal Astronomical Society",

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publisher = "Oxford University Press",

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Osborn, HP, Armstrong, DJ, Adibekyan, V, Collins, KA, Delgado-Mena, E, Howell, SB, Hellier, C, King, GW, Lillo-Box, J, Nielsen, LD, Otegi, JF, Santos, NC, Ziegler, C, Anderson, DR, Briceno, C, Burke, C, Bayliss, D, Barrado, D, Bryant, EM, Brown, DJA, Barros, SCC, Bouchy, F, Caldwell, DA, Conti, DM, Diaz, RF, Dragomir, D, Deleuil, M, Demangeon, ODS, Dorn, C, Daylan, T, Figueira, P, Helled, R, Hoyer, S, Jenkins, JM, Jensen, ELN, Latham, DW, Law, N, Louie, DR, Mann, AW, Osborn, A, Pollacco, DL, Rodriguez, DR, Rackham, BV, Ricker, G, Scott, NJ, Sousa, SG, Seager, S, Stassun, KG, Smith, JC, Strm, P, Udry, S, Villasenor, J, Vanderspek, R, West, R, Wheatley, PJ & Winn, JN 2021, 'A hot mini-Neptune in the radius valley orbiting solar analogue HD 110113', Monthly Notices of the Royal Astronomical Society, vol. 502, no. 4, pp. 4842-4857. https://doi.org/10.1093/mnras/stab182

TY - JOUR

T1 - A hot mini-Neptune in the radius valley orbiting solar analogue HD 110113

AU - Osborn, H. P.

AU - Armstrong, D. J.

AU - Adibekyan, V.

AU - Collins, K. A.

AU - Delgado-Mena, E.

AU - Howell, S. B.

AU - Hellier, C.

AU - King, G. W.

AU - Lillo-Box, J.

AU - Nielsen, L. D.

AU - Otegi, J. F.

AU - Santos, N. C.

AU - Ziegler, C.

AU - Anderson, D. R.

AU - Briceno, C.

AU - Burke, C.

AU - Bayliss, D.

AU - Barrado, D.

AU - Bryant, E. M.

AU - Brown, D. J.A.

AU - Barros, S. C.C.

AU - Bouchy, F.

AU - Caldwell, D. A.

AU - Conti, D. M.

AU - Diaz, R. F.

AU - Dragomir, D.

AU - Deleuil, M.

AU - Demangeon, O. D.S.

AU - Dorn, C.

AU - Daylan, T.

AU - Figueira, P.

AU - Helled, R.

AU - Hoyer, S.

AU - Jenkins, J. M.

AU - Jensen, E. L.N.

AU - Latham, D. W.

AU - Law, N.

AU - Louie, D. R.

AU - Mann, A. W.

AU - Osborn, A.

AU - Pollacco, D. L.

AU - Rodriguez, D. R.

AU - Rackham, B. V.

AU - Ricker, G.

AU - Scott, N. J.

AU - Sousa, S. G.

AU - Seager, S.

AU - Stassun, K. G.

AU - Smith, J. C.

AU - Strm, P.

AU - Udry, S.

AU - Villasenor, J.

AU - Vanderspek, R.

AU - West, R.

AU - Wheatley, P. J.

AU - Winn, J. N.

PY - 2021/4/1

Y1 - 2021/4/1

N2 - We report the discovery of HD 110113 b (TESS object of interest-755.01), a transiting mini-Neptune exoplanet on a 2.5-d orbit around the solar-analogue HD 110113 (Teff = 5730 K). Using TESS photometry and High Accuracy Radial velocity Planet Searcher (HARPS) radial velocities gathered by the NCORES program, we find that HD 110113 b has a radius of 2.05 ± 0.12 R⊕ and a mass of 4.55 ± 0.62 M⊕. The resulting density of $2.90^{+0.75}_{-0.59}$ g cm-3 is significantly lower than would be expected from a pure-rock world; therefore HD 110113 b must be a mini-Neptune with a significant volatile atmosphere. The high incident flux places it within the so-called radius valley; however, HD 110113 b was able to hold on to a substantial (0.1-1 per cent) H-He atmosphere over its ∼4 Gyr lifetime. Through a novel simultaneous Gaussian process fit to multiple activity indicators, we were also able to fit for the strong stellar rotation signal with period 20.8 ± 1.2 d from the RVs and confirm an additional non-transiting planet, HD 110113 c, which has a mass of 10.5 ± 1.2 M⊕ and a period of $6.744^{+0.008}_{-0.009}$ d.

AB - We report the discovery of HD 110113 b (TESS object of interest-755.01), a transiting mini-Neptune exoplanet on a 2.5-d orbit around the solar-analogue HD 110113 (Teff = 5730 K). Using TESS photometry and High Accuracy Radial velocity Planet Searcher (HARPS) radial velocities gathered by the NCORES program, we find that HD 110113 b has a radius of 2.05 ± 0.12 R⊕ and a mass of 4.55 ± 0.62 M⊕. The resulting density of $2.90^{+0.75}_{-0.59}$ g cm-3 is significantly lower than would be expected from a pure-rock world; therefore HD 110113 b must be a mini-Neptune with a significant volatile atmosphere. The high incident flux places it within the so-called radius valley; however, HD 110113 b was able to hold on to a substantial (0.1-1 per cent) H-He atmosphere over its ∼4 Gyr lifetime. Through a novel simultaneous Gaussian process fit to multiple activity indicators, we were also able to fit for the strong stellar rotation signal with period 20.8 ± 1.2 d from the RVs and confirm an additional non-transiting planet, HD 110113 c, which has a mass of 10.5 ± 1.2 M⊕ and a period of $6.744^{+0.008}_{-0.009}$ d.

KW - planets and satellites: detection

KW - stars: individual: HD110113

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UR - http://www.scopus.com/inward/citedby.url?scp=85105241422&partnerID=8YFLogxK

U2 - 10.1093/mnras/stab182

DO - 10.1093/mnras/stab182

M3 - Article

AN - SCOPUS:85105241422

SN - 0035-8711

VL - 502

SP - 4842

EP - 4857

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

A hot mini-Neptune in the radius valley orbiting solar analogue HD 110113

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Keywords

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