197 CANDIDATES and 104 VALIDATED PLANETS in K2's FIRST FIVE FIELDS

Ian J M Crossfield; David R. Ciardi; Erik A. Petigura; Evan Sinukoff; Joshua E. Schlieder; Andrew W. Howard; Charles A. Beichman; Howard Isaacson; Courtney D. Dressing; Jessie L. Christiansen; Benjamin J. Fulton; Sébastien Lépine; Lauren Weiss; Lea Hirsch; John Livingston; Christoph Baranec; Nicholas M. Law; Reed Riddle; Carl Ziegler; Steve B. Howell; Elliott Horch; Mark Everett; Johanna Teske; Arturo O. Martinez; Christian Obermeier; Björn Benneke; Nic Scott; Niall Deacon; Kimberly M. Aller; Brad M S Hansen; Luigi Mancini; Simona Ciceri; Rafael Brahm; Andrés Jordán; Heather A. Knutson; Thomas Henning; Michaël Bonnefoy; Michael C. Liu; Justin R. Crepp; Joshua Lothringer; Phil Hinz; Vanessa Bailey; Andrew Skemer; Denis Defrere

doi:10.3847/0067-0049/226/1/7

197 CANDIDATES and 104 VALIDATED PLANETS in K2's FIRST FIVE FIELDS

Ian J M Crossfield, David R. Ciardi, Erik A. Petigura, Evan Sinukoff, Joshua E. Schlieder, Andrew W. Howard, Charles A. Beichman, Howard Isaacson, Courtney D. Dressing, Jessie L. Christiansen, Benjamin J. Fulton, Sébastien Lépine, Lauren Weiss, Lea Hirsch, John Livingston, Christoph Baranec, Nicholas M. Law, Reed Riddle, Carl Ziegler, Steve B. HowellElliott Horch, Mark Everett, Johanna Teske, Arturo O. Martinez, Christian Obermeier, Björn Benneke, Nic Scott, Niall Deacon, Kimberly M. Aller, Brad M S Hansen, Luigi Mancini, Simona Ciceri, Rafael Brahm, Andrés Jordán, Heather A. Knutson, Thomas Henning, Michaël Bonnefoy, Michael C. Liu, Justin R. Crepp, Joshua Lothringer, Phil Hinz, Vanessa Bailey, Andrew Skemer, Denis Defrere

Centre for Astrophysics Research (CAR)

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Abstract

We present 197 planet candidates discovered using data from the first year of the NASA K2 mission (Campaigns 0-4), along with the results of an intensive program of photometric analyses, stellar spectroscopy, high-resolution imaging, and statistical validation. We distill these candidates into sets of 104 validated planets (57 in multi-planet systems), false positives, and 63 remaining candidates. Our validated systems span a range of properties, with median values of R_P= 2.3 R⊕, P = 8.6 days, T_eff = 5300 K, and Kp = 12.7mag. Stellar spectroscopy provides precise stellar and planetary parameters for most of these systems. We show that K2 has increased by 30% the number of small planets known to orbit moderately bright stars (1-4 R R⊕, Kp = 9-13 mag). Of particular interest are planets smaller than 2 R_⊕, orbiting stars brighter than Kp = 11.5 mag, 5 receiving Earth-like irradiation levels, and several multi-planet systems - including 4 planets orbiting the M dwarf K2-72 near mean-motion resonances. By quantifying the likelihood that each candidate is a planet we demonstrate that our candidate sample has an overall false positive rate of 15%-30%, with rates substantially lower for small candidates (8 R⊕ and/or with P

Original language	English
Article number	7
Number of pages	20
Journal	Astrophysical Journal, Supplement Series
Volume	226
Issue number	1
DOIs	https://doi.org/10.3847/0067-0049/226/1/7
Publication status	Published - 2 Sept 2016

Keywords

catalogs
planets and satellites: fundamental parameters
planets and satellites: general
techniques: high angular resolution
techniques: photometric
techniques: spectroscopic

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10.3847/0067-0049/226/1/7

Crossfield_2016_ApJS_226_7Final published version, 2.53 MB

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Crossfield, I. J. M., Ciardi, D. R., Petigura, E. A., Sinukoff, E., Schlieder, J. E., Howard, A. W., Beichman, C. A., Isaacson, H., Dressing, C. D., Christiansen, J. L., Fulton, B. J., Lépine, S., Weiss, L., Hirsch, L., Livingston, J., Baranec, C., Law, N. M., Riddle, R., Ziegler, C., ... Defrere, D. (2016). 197 CANDIDATES and 104 VALIDATED PLANETS in K2's FIRST FIVE FIELDS. Astrophysical Journal, Supplement Series, 226(1), Article 7. https://doi.org/10.3847/0067-0049/226/1/7

@article{c68259821a604229a8d710aab19a334d,

title = "197 CANDIDATES and 104 VALIDATED PLANETS in K2's FIRST FIVE FIELDS",

abstract = "We present 197 planet candidates discovered using data from the first year of the NASA K2 mission (Campaigns 0-4), along with the results of an intensive program of photometric analyses, stellar spectroscopy, high-resolution imaging, and statistical validation. We distill these candidates into sets of 104 validated planets (57 in multi-planet systems), false positives, and 63 remaining candidates. Our validated systems span a range of properties, with median values of RP= 2.3 R⊕, P = 8.6 days, Teff = 5300 K, and Kp = 12.7mag. Stellar spectroscopy provides precise stellar and planetary parameters for most of these systems. We show that K2 has increased by 30% the number of small planets known to orbit moderately bright stars (1-4 R R⊕, Kp = 9-13 mag). Of particular interest are planets smaller than 2 R⊕, orbiting stars brighter than Kp = 11.5 mag, 5 receiving Earth-like irradiation levels, and several multi-planet systems - including 4 planets orbiting the M dwarf K2-72 near mean-motion resonances. By quantifying the likelihood that each candidate is a planet we demonstrate that our candidate sample has an overall false positive rate of 15%-30%, with rates substantially lower for small candidates (8 R⊕ and/or with P",

keywords = "catalogs, planets and satellites: fundamental parameters, planets and satellites: general, techniques: high angular resolution, techniques: photometric, techniques: spectroscopic",

author = "Crossfield, {Ian J M} and Ciardi, {David R.} and Petigura, {Erik A.} and Evan Sinukoff and Schlieder, {Joshua E.} and Howard, {Andrew W.} and Beichman, {Charles A.} and Howard Isaacson and Dressing, {Courtney D.} and Christiansen, {Jessie L.} and Fulton, {Benjamin J.} and S{\'e}bastien L{\'e}pine and Lauren Weiss and Lea Hirsch and John Livingston and Christoph Baranec and Law, {Nicholas M.} and Reed Riddle and Carl Ziegler and Howell, {Steve B.} and Elliott Horch and Mark Everett and Johanna Teske and Martinez, {Arturo O.} and Christian Obermeier and Bj{\"o}rn Benneke and Nic Scott and Niall Deacon and Aller, {Kimberly M.} and Hansen, {Brad M S} and Luigi Mancini and Simona Ciceri and Rafael Brahm and Andr{\'e}s Jord{\'a}n and Knutson, {Heather A.} and Thomas Henning and Micha{\"e}l Bonnefoy and Liu, {Michael C.} and Crepp, {Justin R.} and Joshua Lothringer and Phil Hinz and Vanessa Bailey and Andrew Skemer and Denis Defrere",

year = "2016",

month = sep,

day = "2",

doi = "10.3847/0067-0049/226/1/7",

language = "English",

volume = "226",

journal = "Astrophysical Journal, Supplement Series",

issn = "0067-0049",

publisher = "IOP Publishing Ltd.",

number = "1",

}

Crossfield, IJM, Ciardi, DR, Petigura, EA, Sinukoff, E, Schlieder, JE, Howard, AW, Beichman, CA, Isaacson, H, Dressing, CD, Christiansen, JL, Fulton, BJ, Lépine, S, Weiss, L, Hirsch, L, Livingston, J, Baranec, C, Law, NM, Riddle, R, Ziegler, C, Howell, SB, Horch, E, Everett, M, Teske, J, Martinez, AO, Obermeier, C, Benneke, B, Scott, N, Deacon, N, Aller, KM, Hansen, BMS, Mancini, L, Ciceri, S, Brahm, R, Jordán, A, Knutson, HA, Henning, T, Bonnefoy, M, Liu, MC, Crepp, JR, Lothringer, J, Hinz, P, Bailey, V, Skemer, A & Defrere, D 2016, '197 CANDIDATES and 104 VALIDATED PLANETS in K2's FIRST FIVE FIELDS', Astrophysical Journal, Supplement Series, vol. 226, no. 1, 7. https://doi.org/10.3847/0067-0049/226/1/7

TY - JOUR

T1 - 197 CANDIDATES and 104 VALIDATED PLANETS in K2's FIRST FIVE FIELDS

AU - Crossfield, Ian J M

AU - Ciardi, David R.

AU - Petigura, Erik A.

AU - Sinukoff, Evan

AU - Schlieder, Joshua E.

AU - Howard, Andrew W.

AU - Beichman, Charles A.

AU - Isaacson, Howard

AU - Dressing, Courtney D.

AU - Christiansen, Jessie L.

AU - Fulton, Benjamin J.

AU - Lépine, Sébastien

AU - Weiss, Lauren

AU - Hirsch, Lea

AU - Livingston, John

AU - Baranec, Christoph

AU - Law, Nicholas M.

AU - Riddle, Reed

AU - Ziegler, Carl

AU - Howell, Steve B.

AU - Horch, Elliott

AU - Everett, Mark

AU - Teske, Johanna

AU - Martinez, Arturo O.

AU - Obermeier, Christian

AU - Benneke, Björn

AU - Scott, Nic

AU - Deacon, Niall

AU - Aller, Kimberly M.

AU - Hansen, Brad M S

AU - Mancini, Luigi

AU - Ciceri, Simona

AU - Brahm, Rafael

AU - Jordán, Andrés

AU - Knutson, Heather A.

AU - Henning, Thomas

AU - Bonnefoy, Michaël

AU - Liu, Michael C.

AU - Crepp, Justin R.

AU - Lothringer, Joshua

AU - Hinz, Phil

AU - Bailey, Vanessa

AU - Skemer, Andrew

AU - Defrere, Denis

PY - 2016/9/2

Y1 - 2016/9/2

N2 - We present 197 planet candidates discovered using data from the first year of the NASA K2 mission (Campaigns 0-4), along with the results of an intensive program of photometric analyses, stellar spectroscopy, high-resolution imaging, and statistical validation. We distill these candidates into sets of 104 validated planets (57 in multi-planet systems), false positives, and 63 remaining candidates. Our validated systems span a range of properties, with median values of RP= 2.3 R⊕, P = 8.6 days, Teff = 5300 K, and Kp = 12.7mag. Stellar spectroscopy provides precise stellar and planetary parameters for most of these systems. We show that K2 has increased by 30% the number of small planets known to orbit moderately bright stars (1-4 R R⊕, Kp = 9-13 mag). Of particular interest are planets smaller than 2 R⊕, orbiting stars brighter than Kp = 11.5 mag, 5 receiving Earth-like irradiation levels, and several multi-planet systems - including 4 planets orbiting the M dwarf K2-72 near mean-motion resonances. By quantifying the likelihood that each candidate is a planet we demonstrate that our candidate sample has an overall false positive rate of 15%-30%, with rates substantially lower for small candidates (8 R⊕ and/or with P

AB - We present 197 planet candidates discovered using data from the first year of the NASA K2 mission (Campaigns 0-4), along with the results of an intensive program of photometric analyses, stellar spectroscopy, high-resolution imaging, and statistical validation. We distill these candidates into sets of 104 validated planets (57 in multi-planet systems), false positives, and 63 remaining candidates. Our validated systems span a range of properties, with median values of RP= 2.3 R⊕, P = 8.6 days, Teff = 5300 K, and Kp = 12.7mag. Stellar spectroscopy provides precise stellar and planetary parameters for most of these systems. We show that K2 has increased by 30% the number of small planets known to orbit moderately bright stars (1-4 R R⊕, Kp = 9-13 mag). Of particular interest are planets smaller than 2 R⊕, orbiting stars brighter than Kp = 11.5 mag, 5 receiving Earth-like irradiation levels, and several multi-planet systems - including 4 planets orbiting the M dwarf K2-72 near mean-motion resonances. By quantifying the likelihood that each candidate is a planet we demonstrate that our candidate sample has an overall false positive rate of 15%-30%, with rates substantially lower for small candidates (8 R⊕ and/or with P

KW - catalogs

KW - planets and satellites: fundamental parameters

KW - planets and satellites: general

KW - techniques: high angular resolution

KW - techniques: photometric

KW - techniques: spectroscopic

UR - http://www.scopus.com/inward/record.url?scp=84989865648&partnerID=8YFLogxK

U2 - 10.3847/0067-0049/226/1/7

DO - 10.3847/0067-0049/226/1/7

M3 - Article

AN - SCOPUS:84989865648

SN - 0067-0049

VL - 226

JO - Astrophysical Journal, Supplement Series

JF - Astrophysical Journal, Supplement Series

IS - 1

M1 - 7

ER -

197 CANDIDATES and 104 VALIDATED PLANETS in K2's FIRST FIVE FIELDS

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