| 词条 | Rho Herculis |
| 释义 |
|epoch=J2000 |constell=Hercules |component1=ρ Her A |ra1={{RA|17|23|40.972}}[1] |dec1={{DEC|+37|08|45.33}}[1] |appmag_v1=4.510[1] |component2=ρ Her B |ra2={{RA|17|23|40.718}} |dec2={{DEC|+37|08|48.44}}[1] |appmag_v2=5.398[1] }}{{Starbox character |component1=ρ Her A |class=A0IIIpHgMn[2] |b-v=+0.00[3] |u-b=−0.06[3] |component2=ρ Her B |class2=B9.5IVn[2] }}{{Starbox astrometry |component1=ρ Her A |radial_v=−21.0 ± 2[4] |prop_mo_ra=−38.6[5] |prop_mo_dec=9.2[5] |parallax=8.3380 |p_error=0.3358 |parallax_footnote=[6] |component2=ρ Her B |radial_v2=−19.3 ± 2[4] |prop_mo_ra2=−38.6[1] |prop_mo_dec2=9.2[1] |parallax2=9.0354 |p_error2=0.1135 |parallax_footnote2=[7] }}{{Starbox detail |component1=A |mass=4.00/2.93[8] |radius= |temperature=9,118[6] |luminosity= |gravity= |rotational_velocity=75[9] |age_myr= |component2 = B |mass2=3.27[8] |temperature2=8,755[7] |rotational_velocity2=291[9] |gravity2=3.6[10] |metal_fe=0.0[10] }}{{Starbox catalog |names={{odlist|ADS=10526 AB|CCDM=J17236+3708AB|BD=+37° 2878|HIP=85112}} |component1=ρ Her A |names1={{odlist|HD=157779|HR=6485|SAO=66001}} |component2=ρ Her B |names2={{odlist|HD=157778|HR=6484|SAO=66000}} }}{{Starbox reference |Simbad=rho+Her|sn=ρ Her |Simbad2=rho+Her+A|sn2=ρ Her A |Simbad3=rho+Her+B|sn3=ρ Her B }}{{Starbox end}} Rho Herculis (ρ Her, ρ Herculis) is a double star in the constellation of Hercules. The apparent magnitudes of the components are 4.510 and 5.398, respectively. Parallax measurements published in Gaia Data Release 2 put the system at some 360-390 light-years (111-121 parsecs) away. The two stars of Rho Herculis are separated by four arcseconds, and are known as Rho Herculis A and B, respectively. A is an A-type giant star, while B is a B-type subgiant star.[2] They are also referred to, rarely, as Rho1 Herculis and Rho2 Herculis. Rho Herculis A is itself a close binary which has been resolved using speckle interferometry, with the two components separated by {{val|0.252|ul="}}.[11] The two visual components have very similar spectral types, between A0 and B9. Rho Herculis A is generally assigned a giant luminosity class, with Rho Herculis B most often considered to be a main sequence star.[12] Rho Herculis A has been considered to be an Ap star, with unusually strong silicon or mercury and manganese absorption lines in its spectrum,[2][13] but this is now considered to be dubious.[14] References1. ^1 2 3 4 5 6 {{cite journal|title=The Tycho-2 catalogue of the 2.5 million brightest stars|author=Høg, E.|display-authors=etal|date=2000|journal=Astronomy and Astrophysics|volume=355|pages=L27–L30|bibcode=2000A&A...355L..27H}} {{Stars of Hercules|state=collapsed}}2. ^1 2 3 {{cite journal|bibcode=1995ApJS...99..135A|doi=10.1086/192182|title=The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars|journal=The Astrophysical Journal Supplement Series|volume=99|pages=135|year=1995|last1=Abt|first1=Helmut A.|last2=Morrell|first2=Nidia I.}} 3. ^1 {{cite journal|title=UBVRIJKL Photometry of the Bright Stars|author1=Johnson, H. L.|journal=Communications of the Lunar and Planetary Laboratory|volume=4|pages=99|date=1966|bibcode=1966CoLPL...4...99J}} 4. ^1 {{cite journal|title=General catalogue of stellar radial velocities|journal=Carnegie Institute Washington D.c. Publication|pages=0|author=Wilson, Ralph Elmer|date=1953|bibcode=1953GCRV..C......0W}} 5. ^1 {{cite journal|author1=Zacharias, N.|title=The fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)|journal=VizieR On-line Data Catalog|date=2012|bibcode=2012yCat.1322....0Z}} 6. ^1 {{cite DR2|1337345927125084416}} 7. ^1 {{cite DR2|1337345922829546752}} 8. ^1 {{cite web|url=http://www.ctio.noao.edu/~atokovin/stars/stars.php?cat=HD&number=157779|title=Multiple Star Catalog|accessdate=2018-11-30}} 9. ^1 {{cite journal|bibcode=2002A&A...393..897R|title=Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin I|journal=Astronomy and Astrophysics|volume=393|issue=3|pages=897–911|last1=Royer|first1=F.|last2=Grenier|first2=S.|last3=Baylac|first3=M. -O.|last4=Gómez|first4=A. E.|last5=Zorec|first5=J.|year=2002|doi=10.1051/0004-6361:20020943}} 10. ^1 {{cite journal|bibcode=2016A&A...589A..83G|title=A new method for the inversion of atmospheric parameters of A/Am stars|journal=Astronomy and Astrophysics|volume=589|pages=A83|last1=Gebran|first1=M.|last2=Farah|first2=W.|last3=Paletou|first3=F.|last4=Monier|first4=R.|last5=Watson|first5=V.|year=2016|doi=10.1051/0004-6361/201528052}} 11. ^{{cite journal|bibcode=2009AJ....137.3358M|title=The High Angular Resolution Multiplicity of Massive Stars|journal=The Astronomical Journal|volume=137|issue=2|pages=3358|last1=Mason|first1=Brian D.|last2=Hartkopf|first2=William I.|last3=Gies|first3=Douglas R.|last4=Henry|first4=Todd J.|last5=Helsel|first5=John W.|year=2009}} 12. ^{{cite journal|bibcode=2014yCat....1.2023S|title=VizieR Online Data Catalog: Catalogue of Stellar Spectral Classifications (Skiff, 2009-2016)|journal=VizieR On-line Data Catalog|last1=Skiff|first1=B. A.|year=2014}} 13. ^{{cite journal|bibcode=1984ApJ...276..266A|title=The nature of the visual companions of AP and AM stars|journal=The Astrophysical Journal|volume=276|pages=266|last1=Abt|first1=H. A.|last2=Cardona|first2=O.|year=1984}} 14. ^{{cite journal|bibcode= 2009A&A...498..961R |title= Catalogue of Ap, HgMn and Am stars |journal= Astronomy and Astrophysics |volume= 498 |issue= 3 |pages= 961 |last1= Renson |first1= P. |last2= Manfroid |first2= J. |year= 2009 |doi= 10.1051/0004-6361/200810788 }} 10 : Hercules (constellation)|A-type giants|B-type subgiants|Double stars|Bayer objects|Flamsteed objects|Durchmusterung objects|Henry Draper Catalogue objects|Hipparcos objects|HR objects |
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