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词条 K2-19
释义

  1. Planetary system

     Discovery  Characteristics 

  2. References

{{short description|K-type main sequence star}}{{Starbox begin
| name = K2-19
}}{{Starbox observe
| epoch = J2000
| constell = Virgo[1]
| ra = {{RA|11|39|50.4804}}[2]
| dec = {{DEC|+00|36|12.8773}}[2]
| appmag_v = {{val|13.002|0.009}}
}}{{Starbox character
| class = K0 V[5]
| appmag_1_passband = J
| appmag_1 = {{val|11.596|0.024}}[6]
| appmag_2_passband = H
| appmag_2 = {{val|11.208|0.022}}[6]
| appmag_3_passband = K
| appmag_3 = {{val|11.161|0.026}}[6]
| b-v =
| u-b =
| variable = Planetary transit variable[9]
}}{{Starbox astrometry
| radial_v =
| prop_mo_ra = {{val|−18.788|0.104}}[2]
| prop_mo_dec = {{val|4.415|0.066}}[2]
| parallax = 3.4230
| p_error = 0.0658
| parallax_footnote = [2]
| absmag_v =
}}{{Starbox detail
| source = [5]
| mass = {{val|0.918|0.064}}
| radius = {{val|0.881|0.111}}
| luminosity =
| gravity = {{val|4.50|0.10}}
| temperature = {{val|5250|70}}
| metal_fe = {{val|0.10|0.05}}
| rotation = {{val|20.54|0.30|u=days}}
| rotational_velocity = {{val|3.00|0.50}}
| age_gyr =
}}{{Starbox catalog
| names = {{odlist | name=EPIC 201505350 | name2=Gaia DR2 3798833775141351552 | name3=UCAC4 454-050261 }}[14]
}}{{Starbox end}}

K2-19 is a K-type main sequence star[5] that is magnetically active, and has a light curve that exhibits variations in brightness of ~1%.[16] Three confirmed transiting exoplanets are known to orbit this star.

Planetary system

Discovery

The two outer planets were reported as planet candidates during analysis of data from Campaign 1 of the Kepler spacecrafts K2 extended mission.[17] Both planets were confirmed by David J. Armstrong and collaborators, who used ground-based telescopes to detect additional transits and measure hour-long transit-timing variations for K2-19b.[9] They were independently validated along with 20 other planets by Benjamin T. Montet and team.[19]

K2-19d was first reported as a planet candidate during a search for candidates from the first year of the K2 Mission[20] and was later validated by Sinukoff et al.[16]

Characteristics

K2-19 has a planetary system with three known planets, of which the two larger ones, K2-19b and K2-19c, are close to the 3:2 mean motion resonance. All three planets orbit closer to their star than the planet Mercury does to the Sun.[5][23]

{{OrbitboxPlanet begin
| table_ref = [5][25][16]
}}{{OrbitboxPlanet
| exoplanet = K2-19b
| mass_earth = {{val|54.4|8.9}}
| semimajor = {{val|0.0762|0.0022}}
| period = {{val|7.91951|0.00040|0.00012}}
| eccentricity = {{val|0.023|0.240|0.020}}
| inclination = {{val|88.87|0.16|0.60}}
| radius_earth = {{val|7.16|0.91}}
}}{{OrbitboxPlanet
| exoplanet = K2-19c
| mass_earth = {{val|7.5|3.0|1.4}}
| semimajor = {{val|0.1001|0.0029}}
| period = {{val|11.9066|0.0021|0.0014}}
| eccentricity = {{val|0.183|0.283|0.003}}
| inclination = {{val|88.92|0.14|0.41}}
| radius_earth = {{val|4.34|0.55}}
}}{{OrbitboxPlanet
| exoplanet = K2-19d
| mass_earth = ?
| semimajor = {{val|0.0344|0.0006}}
| period = {{val|2.50856|0.00041}}
| eccentricity = ?
| inclination = {{val|85.83|2.97|4.74}}
| radius_earth = {{val|1.14|0.13}}
}}{{Orbitbox end}}

References

1. ^1 2 {{cite journal | title=One of the closest exoplanet pairs to the 3:2 mean motion resonance: K2-19b and c | url=https://www.aanda.org/articles/aa/full_html/2015/10/aa26008-15/aa26008-15.html | last1=Armstrong | first1=David J. | last2=Santerne | first2=Alexandre | last3=Veras | first3=Dimitri | last4=Barros | first4=Susana C. C. | last5=Demangeon | first5=Olivier | last6=Lillo-Box | first6=Jorge | last7=McCormac | first7=James | last8=Osborn | first8=Hugh P. | last9=Tsantaki | first9=Maria | last10=Almenara | first10=José-Manuel | last11=Barrado | first11=David | last12=Boisse | first12=Isabelle | last13=Bonomo | first13=Aldo S. | last14=Brown | first14=David J. A. | last15=Bruno | first15=Giovanni | last16=Cerda | first16=Javiera Rey | last17=Courcol | first17=Bastien | last18=Deleuil | first18=Magali | last19=Díaz | first19=Rodrigo F. | last20=Doyle | first20=Amanda P. | last21=Hébrard | first21=Guillaume | last22=Kirk | first22=James | last23=Lam | first23=Kristine W. F. | last24=Pollacco | first24=Don L. | last25=Rajpurohit | first25=Arvind | last26=Spake | first26=Jessica | last27=Walker | first27=Simon R. | display-authors=1 | journal=Astronomy and Astrophysics | volume=582 | at=A33 | year=2015 | arxiv=1503.00692 | bibcode=2015A&A...582A..33A | doi=10.1051/0004-6361/201526008 }}
2. ^1 {{cite journal | title=Photodynamical mass determination of the multiplanetary system K2-19 | url=https://academic.oup.com/mnras/article/454/4/4267/1001265 | last1=Barros | first1=S. C. C. | last2=Almenara | first2=J. M. | last3=Demangeon | first3=O. | last4=Tsantaki | first4=M. | last5=Santerne | first5=A. | last6=Armstrong | first6=D. J. | last7=Barrado | first7=D. | last8=Brown | first8=D. | last9=Deleuil | first9=M. | last10=Lillo-Box | first10=J. | last11=Osborn | first11=H. | last12=Pollacco | first12=D. | last13=Abe | first13=L. | last14=Andre | first14=P. | last15=Bendjoya | first15=P. | last16=Boisse | first16=I. | last17=Bonomo | first17=A. S. | last18=Bouchy | first18=F. | last19=Bruno | first19=G. | last20=Cerda | first20=J. Rey | last21=Courcol | first21=B. | last22=Díaz | first22=R. F. | last23=Hébrard | first23=G. | last24=Kirk | first24=J. | last25=Lachurié | first25=J. C. | last26=Lam | first26=K. W. F. | last27=Martinez | first27=P. | last28=McCormac | first28=J. | last29=Moutou | first29=C. | last30=Rajpurohit | first30=A. | displayauthors=1 | journal=Monthly Notices of the Royal Astronomical Society | volume=454 | issue=4 | pages=4267–4276 | year=2015 | arxiv=1510.01047 | bibcode=2015MNRAS.454.4267B | doi=10.1093/mnras/stv2271 }}
3. ^1 {{cite journal | title=A Systematic Search for Transiting Planets in the K2 Data | url=http://iopscience.iop.org/article/10.1088/0004-637X/806/2/215/meta | last1=Foreman-Mackey | first1=Daniel | last2=Montet | first2=Benjamin T. | last3=Hogg | first3=David W. | last4=Morton | first4=Timothy D. | last5=Wang | first5=Dun | last6=Schölkopf | first6=Bernhard | display-authors=1 | journal=The Astrophysical Journal | volume=806 | issue=2 | at=215 | year=2015 | arxiv=1502.04715 | bibcode=2015ApJ...806..215F | doi=10.1088/0004-637X/806/2/215 }}
4. ^1 2 3 4 5 {{Cite Gaia DR2|3798833775141351552}}
5. ^1 {{cite web | title=Mercury Fact Sheet | url=http://nssdc.gsfc.nasa.gov/planetary/factsheet/mercuryfact.html | last=Williams | first=David R. | publisher=NASA | date=2018-09-27 | accessdate=2019-01-12 }}
6. ^1 {{cite journal | title=Stellar and Planetary Properties of K2 Campaign 1 Candidates and Validation of 17 Planets, Including a Planet Receiving Earth-like Insolation | url=http://iopscience.iop.org/article/10.1088/0004-637X/809/1/25/meta | last1=Montet | first1=Benjamin T. | last2=Morton | first2=Timothy D. | last3=Foreman-Mackey | first3=Daniel | last4=Johnson | first4=John Asher | last5=Hogg | first5=David W. | last6=Bowler | first6=Brendan P. | last7=Latham | first7=David W. | last8=Bieryla | first8=Allyson | last9=Mann | first9=Andrew W. | display-authors=1 | journal=The Astrophysical Journal | volume=809 | issue=1 | at=25 | year=2015 | arxiv=1503.07866 | bibcode=2015ApJ...809...25M | doi=10.1088/0004-637X/809/1/25 }}
7. ^1 2 3 4 5 {{cite journal | title=Mass determination of K2-19b and K2-19c from radial velocities and transit timing variations | url=https://www.aanda.org/articles/aa/full_html/2017/05/aa28639-16/aa28639-16.html | last1=Nespral | first1=D. | last2=Gandolfi | first2=D. | last3=Deeg | first3=H. J. | last4=Borsato | first4=L. | last5=Fridlund | first5=M. C. V. | last6=Barragán | first6=O. | last7=Alonso | first7=R. | last8=Grziwa | first8=S. | last9=Korth | first9=J. | last10=Albrecht | first10=S. | last11=Cabrera | first11=J. | last12=Csizmadia | first12=Sz. | last13=Nowak | first13=G. | last14=Kuutma | first14=T. | last15=Saario | first15=J. | last16=Eigmüller | first16=P. | last17=Erikson | first17=A. | last18=Guenther | first18=E. W. | last19=Hatzes | first19=A. P. | last20=Montañés Rodríguez | first20=P. | last21=Palle | first21=E. | last22=Pätzold | first22=M. | last23=Prieto-Arranz | first23=J. | last24=Rauer | first24=H. | last25=Sebastian | first25=D. | display-authors=1 | journal=Astronomy and Astrophysics | volume=601 | at=A128 | year=2017 | arxiv=1604.01265 | bibcode=2017A&A...601A.128N | doi=10.1051/0004-6361/201628639 }}
8. ^1 {{cite journal | title=Identification of a Constellation From a Position | url=http://articles.adsabs.harvard.edu/full/1987PASP...99..695R | last1=Roman | first1=Nancy G. | journal=Publications of the Astronomical Society of the Pacific | volume=99 | issue=617 | pages=695–699 | year=1987 | bibcode=1987PASP...99..695R | doi=10.1086/132034 }} Vizier query form
9. ^1 {{cite simbad | title=K2-19 | accessdate=2018-12-31 }}
10. ^1 2 3 {{cite journal | title=Eleven Multiplanet Systems From K2 Campaigns 1 and 2 and the Masses of Two Hot Super-Earths | url=http://iopscience.iop.org/article/10.3847/0004-637X/827/1/78/meta | last1=Sinukoff | first1=Evan | last2=Howard | first2=Andrew W. | last3=Petigura | first3=Erik A. | last4=Schlieder | first4=Joshua E. | last5=Crossfield | first5=Ian J. M. | last6=Ciardi | first6=David R. | last7=Fulton | first7=Benjamin J. | last8=Isaacson | first8=Howard | last9=Aller | first9=Kimberly M. | last10=Baranec | first10=Christoph | last11=Beichman | first11=Charles A. | last12=Hansen | first12=Brad M. S. | last13=Knutson | first13=Heather A. | last14=Law | first14=Nicholas M. | last15=Liu | first15=Michael C. | last16=Riddle | first16=Reed | last17=Dressing | first17=Courtney D. | display-authors=1 | journal=The Astrophysical Journal | volume=827 | issue=1 | at=78 | year=2016 | arxiv=1511.09213 | bibcode=2016ApJ...827...78S | doi=10.3847/0004-637X/827/1/78 }}
11. ^1 2 3 {{cite journal | title=The Two Micron All Sky Survey (2MASS) | url=http://iopscience.iop.org/article/10.1086/498708/fulltext/ | last1=Skrutskie | first1=M. F. | last2=Cutri | first2=R. M. | last3=Stiening | first3=R. | last4=Weinberg | first4=M. D. | last5=Schneider | first5=S. | last6=Carpenter | first6=J. M. | last7=Beichman | first7=C. | last8=Capps | first8=R. | last9=Chester | first9=T. | last10=Elias | first10=J. | last11=Huchra | first11=J. | last12=Liebert | first12=J. | last13=Lonsdale | first13=C. | last14=Monet | first14=D. G. | last15=Price | first15=S. | last16=Seitzer | first16=P. | last17=Jarrett | first17=T. | last18=Kirkpatrick | first18=J. D. | last19=Gizis | first19=J. E. | last20=Howard | first20=E | last21=Evans | first21=T | last22=Fowler | first22=J | last23=Fullmer | first23=L | last24=Hurt | first24=R | last25=Light | first25=R | last26=Kopan | first26=E. L. | last27=Marsh | first27=K. A. | last28=McCallon | first28=H. L. | last29=Tam | first29=R. | last30=Van Dyk | first30=S. | display-authors=1 | journal=The Astronomical Journal | volume=131 | issue=2 | pages=1163–1183 | year=2006 | bibcode=2006AJ....131.1163S | doi=10.1086/498708 }}Vizier catalog entry
12. ^1 {{cite journal | title=Planetary Candidates from the First Year of the K2 Mission | url=http://iopscience.iop.org/article/10.3847/0067-0049/222/1/14/meta | last1=Vanderburg | first1=Andrew | last2=Latham | first2=David W. | last3=Buchhave | first3=Lars A. | last4=Bieryla | first4=Allyson | last5=Berlind | first5=Perry | last6=Calkins | first6=Michael L. | last7=Esquerdo | first7=Gilbert A. | last8=Welsh | first8=Sophie | last9=Johnson | first9=John Asher | display-authors=1 | journal=The Astrophysical Journal Supplement Series | volume=222 | issue=1 | at=14 | year=2016 | arxiv=1511.07820 | bibcode=2016ApJS..222...14V | doi=10.3847/0067-0049/222/1/14 }}
Vizier catalog entry[1][2][3][4][5][6][7][8][9][10][11][12]
}}{{Stars of Virgo}}{{exoplanets}}{{Sky|11|39|50.4804|+|00|36|12.8773}}

4 : K-type main-sequence stars|Planetary systems with three confirmed planets|Planetary transit variables|Virgo (constellation)
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