“Kappa Coronae Borealis”的意思、由来-开放百科全书

In March 2013, it was announced that resolved images of at least one dust disk surrounding Kappa Coronae Borealis were captured, making it the first subgiant to host such circumstellar belt.^[2] The disk extends out to 120 AU.^[1]

Planetary system

In October 2007, a giant planet was found by Johnson et al., who used the radial velocity method.^[3] In 2012 it was confirmed.^[1]

This planet was assumed to be outside the habitable zone on the assumption that the star is K1IVa.^[4] Given the star's luminosity, the planet is more likely on the zone's inner edge.^[5]

The width of the circumstellar belt suggests the presence of a second planetary companion of the star, either within it or between two narrower belts.^[2]

See also

References

1. ^¹{{cite journal|author1=Pawellek, Nicole |author2=Krivov, Alexander V. |author3=Marshall, Jonathan P. |author4=Montesinos, Benjamin |author5=Ábrahám, Péter |author6=Moór, Attila |author7=Bryden, Geoffrey |author8=Eiroa, Carlos |date=2014|title=Disk Radii and Grain Sizes in Herschel-resolved Debris Disks|journal=The Astrophysical Journal|volume=792|issue=1|id=65|pages=19|bibcode=2014ApJ...792...65P | doi=10.1088/0004-637X/792/1/65|arxiv = 1407.4579 }}
2. ^¹²{{cite journal |last=Bonsor |first=Amy |display-authors=etal |date=2013 |title=Spatially resolved images of dust belt(s) around the planet-hosting subgiant κ CrB |journal=MNRAS |volume=431 |issue= 4|pages=3025–3035 |doi=10.1093/mnras/stt367 |arxiv = 1302.7000 |bibcode = 2013MNRAS.431.3025B }}
3. ^{{cite journal | url=http://www.iop.org/EJ/article/0004-637X/675/1/784/73002.html | author=Johnson | title=Retired A Stars and Their Companions. II. Jovian Planets Orbiting κ CrB and HD 167042 | journal=The Astrophysical Journal | date=2008 | volume=675 | issue=1 | pages=784–789 | doi=10.1086/526453 | last2=Marcy | first2=Geoffrey W. | last3=Fischer | first3=Debra A. | last4=Wright | first4=Jason T. | last5=Reffert | first5=Sabine | last6=Kregenow | first6=Julia M. | last7=Williams | first7=Peter K. G. | last8=Peek | first8=Kathryn M. G. | bibcode=2008ApJ...675..784J | display-authors=1|arxiv = 0711.4367 }}
4. ^{{cite web |url=http://exoplanet.hanno-rein.de/system.php?id=kappa+CrB+b |title=Planet kappa CrB b }}{{dead link|date=January 2018 |bot=InternetArchiveBot |fix-attempted=yes }}
5. ^An earth-analogue should be slightly more than 3 AU away: square root of luminosity 12.9.
6. ^¹²³⁴⁵⁶{{cite journal | title=Substellar Companions to Seven Evolved Intermediate-Mass Stars | url=https://academic.oup.com/pasj/article/64/6/135/1422181 | last1=Sato | first1=Bun'ei | last2=Omiya | first2=Masashi | last3=Harakawa | first3=Hiroki | last4=Izumiura | first4=Hideyuki | last5=Kambe | first5=Eiji | last6=Takeda | first6=Yoichi | last7=Yoshida | first7=Michitoshi | last8=Itoh | first8=Yoichi | last9=Ando | first9=Hiroyasu | last10=Kokubo | first10=Eiichiro | last11=Ida | first11=Shigeru | display-authors=1 | journal=Publications of the Astronomical Society of Japan | volume=64 | issue=6 | at=135 | year=2012 | arxiv=1207.3141 | bibcode=2012PASJ...64..135S | doi=10.1093/pasj/64.6.135 }}

词条	Kappa Coronae Borealis
释义	Dust disk Planetary system See also References {{Starbox begin \| name = κ Coronae Borealis }}{{Starbox image \| image ={{Location mark \|image=Corona Borealis constellation map.svg\|alt=\|float=center\|width=260 \|label=\|position=right \|mark=Red circle.svg\|mark_width=10\|mark_link=κ CrB \|x=472\|y=292 }} \|caption=Location of κ Coronae Borealis (circled) }}{{Starbox observe \| epoch = J2000.0 \| constell = Corona Borealis \| ra = {{RA\|15\|51\|13.9315}} \| dec = {{DEC\|+35\|39\|26.575}} \| appmag_v = +4.79^[1] \| absmag_v = +2.35 }}{{Starbox character \| class= K0 III-IV^[1] }}{{Starbox astrometry \| parallax=32.13±0.61^[1] \| dist_ly = 101.51 \| dist_pc = 31.12 \| absmag_v = +2.37 }}{{Starbox detail \| source = {{cn\|date=October 2017}} \| mass = 1.51 (1.32–1.70)^[1] \| radius = 5.0 (4.8–5.2) \| gravity = 3.21±0.08 \| metal_fe= {{Val\|0.08\|0.02}} \| age_myr = \| luminosity = 13.6 \| temperature = {{Val\|4877\|25\|fmt=commas}} \| rotational_velocity = }}{{Starbox catalog \| names = κ CrB, 11 CrB, HD 142091, HIP 77655, HR 5901, SAO 64948 }}{{Starbox reference \| Simbad = Kappa+Coronae+Borealis \| EPE = kappa+CrB }}{{Starbox end }}Kappa Coronae Borealis, Latinized from κ Coronae Borealis, is a star approximately 102 light years away in the constellation of Corona Borealis. The apparent magnitude is +4.82 (4.17 trillion times fainter than the Sun) and the absolute magnitude is +2.35 (9.82 times brighter than the Sun). It is an orange K-type subgiant star of spectral type K1IV, meaning it has nearly completely exhausted its hydrogen supply in its core. It is 1.94 times as massive as the Sun yet has brightened to 12.5 times its luminosity.^[1] Around 2.5 billion years old, it was formerly an A-type main sequence star.^[9] Dust disk In March 2013, it was announced that resolved images of at least one dust disk surrounding Kappa Coronae Borealis were captured, making it the first subgiant to host such circumstellar belt.^[2] The disk extends out to 120 AU.^[1] Planetary system In October 2007, a giant planet was found by Johnson et al., who used the radial velocity method.^[3] In 2012 it was confirmed.^[1] This planet was assumed to be outside the habitable zone on the assumption that the star is K1IVa.^[4] Given the star's luminosity, the planet is more likely on the zone's inner edge.^[5] The width of the circumstellar belt suggests the presence of a second planetary companion of the star, either within it or between two narrower belts.^[2] {{OrbitboxPlanet begin \| table_ref = ^[1] }}{{OrbitboxPlanet \| exoplanet = b \| mass = >1.6 \| period = 1251 ± 15 \| semimajor = 2.6 \| eccentricity = 0.073 ± 0.049 }}{{Orbitbox end}} See also HD 16175 HD 167042 List of extrasolar planets Rho Coronae Borealis References 1. ^¹{{cite journal\|author1=Pawellek, Nicole \|author2=Krivov, Alexander V. \|author3=Marshall, Jonathan P. \|author4=Montesinos, Benjamin \|author5=Ábrahám, Péter \|author6=Moór, Attila \|author7=Bryden, Geoffrey \|author8=Eiroa, Carlos \|date=2014\|title=Disk Radii and Grain Sizes in Herschel-resolved Debris Disks\|journal=The Astrophysical Journal\|volume=792\|issue=1\|id=65\|pages=19\|bibcode=2014ApJ...792...65P \| doi=10.1088/0004-637X/792/1/65\|arxiv = 1407.4579 }} 2. ^¹²{{cite journal \|last=Bonsor \|first=Amy \|display-authors=etal \|date=2013 \|title=Spatially resolved images of dust belt(s) around the planet-hosting subgiant κ CrB \|journal=MNRAS \|volume=431 \|issue= 4\|pages=3025–3035 \|doi=10.1093/mnras/stt367 \|arxiv = 1302.7000 \|bibcode = 2013MNRAS.431.3025B }} 3. ^{{cite journal \| url=http://www.iop.org/EJ/article/0004-637X/675/1/784/73002.html \| author=Johnson \| title=Retired A Stars and Their Companions. II. Jovian Planets Orbiting κ CrB and HD 167042 \| journal=The Astrophysical Journal \| date=2008 \| volume=675 \| issue=1 \| pages=784–789 \| doi=10.1086/526453 \| last2=Marcy \| first2=Geoffrey W. \| last3=Fischer \| first3=Debra A. \| last4=Wright \| first4=Jason T. \| last5=Reffert \| first5=Sabine \| last6=Kregenow \| first6=Julia M. \| last7=Williams \| first7=Peter K. G. \| last8=Peek \| first8=Kathryn M. G. \| bibcode=2008ApJ...675..784J \| display-authors=1\|arxiv = 0711.4367 }} 4. ^{{cite web \|url=http://exoplanet.hanno-rein.de/system.php?id=kappa+CrB+b \|title=Planet kappa CrB b }}{{dead link\|date=January 2018 \|bot=InternetArchiveBot \|fix-attempted=yes }} 5. ^An earth-analogue should be slightly more than 3 AU away: square root of luminosity 12.9. 6. ^¹²³⁴⁵⁶{{cite journal \| title=Substellar Companions to Seven Evolved Intermediate-Mass Stars \| url=https://academic.oup.com/pasj/article/64/6/135/1422181 \| last1=Sato \| first1=Bun'ei \| last2=Omiya \| first2=Masashi \| last3=Harakawa \| first3=Hiroki \| last4=Izumiura \| first4=Hideyuki \| last5=Kambe \| first5=Eiji \| last6=Takeda \| first6=Yoichi \| last7=Yoshida \| first7=Michitoshi \| last8=Itoh \| first8=Yoichi \| last9=Ando \| first9=Hiroyasu \| last10=Kokubo \| first10=Eiichiro \| last11=Ida \| first11=Shigeru \| display-authors=1 \| journal=Publications of the Astronomical Society of Japan \| volume=64 \| issue=6 \| at=135 \| year=2012 \| arxiv=1207.3141 \| bibcode=2012PASJ...64..135S \| doi=10.1093/pasj/64.6.135 }} ^[6] }}{{Sky\|15\|51\|13.9315\|+\|35\|39\|26.575\|101.51}}{{Stars of Corona Borealis}} 9 : Bayer objects\|Corona Borealis\|Flamsteed objects\|Henry Draper Catalogue objects\|Hipparcos objects\|HR objects\|K-type subgiants\|Planetary systems\|Durchmusterung objects
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Dust disk

Planetary system

See also

References