| 词条 | Gamma Phoenicis |
| 释义 |
| name = γ Phoenicis }}{{Starbox image |image={{Location mark |image=Phoenix constellation map.svg|alt=|float=center|width=280 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=Gamma Phoenicis |x=311|y=222 }} |caption=Location of γ Phoenicis (circled) }}{{Starbox observe | epoch = J2000 | constell = Phoenix | ra = {{RA|01|28|21.92727}}[1] | dec = {{DEC|-43|19|05.6502}}[1] | appmag_v = 3.41[2] }}{{Starbox character |class= M0III[3] | b-v = +1.57[4] | u-b = +1.85[4] | variable = Lb?[5] + Beta Lyrae variable(EB/GS)[8][6] }}{{Starbox astrometry | radial_v = +25.80[7] | prop_mo_ra = -18.06[1] | prop_mo_dec = -208.63[1] | parallax = 13.96 | p_error = 0.34 | parallax_footnote = [1] | absmag_v = -0.86[2] }}{{Starbox orbit |reference=[8] |period_unitless=193.8 d |axis_unitless=5.57 mas[9] |inclination=46.3 |node=340.2 |periastron=2419544.9 }}{{Starbox detail | source = [8] | component1 = Primary | mass = 1.3 | radius = 50 - 55 | temperature = 3,802 | luminosity = 562 | component2 = secondary | mass2 = 0.6 }}{{Starbox catalog | names = CPD−43° 449, FK5 49, GC 1787, HIP 6867, HR 429, HD 9053, SAO 215516 }}{{Starbox reference | Simbad = *+gam+Phe }}{{Starbox end}}Gamma Phoenicis is a star system in the constellation Phoenix, located around {{convert|71.63|pc|ly}} distant.[1] γ Phoenicis is a spectroscopic binary and a small amplitude variable star. The star system shows regular variations in brightness that were reported as a 97.5 day period in the Hipparcos catalogue,[1] but have since been ascribed to a 193-day orbital period with primary and secondary minima.[10] Although the light curve appears to show eclipses, the high orbital inclination suggests the variations are due to ellipsoidal stars as they rotate in their orbit.[11] γ Phoenicis is listed in the General Catalogue of Variable Stars as a possible slow irregular variable with a range from 3.39 to 3.49, the same as reported for the eclipses or ellipsoidal variations.[5] Only the primary star in the γ Phoenicis system is visible. The second is inferred solely from variations in the radial velocity of the primary star. The primary is a red giant of spectral type M0III, a star that has used up its core hydrogen, then expanded and cooled as it burns a shell of hydrogen around an inert helium core. The two stars are estimated to have masses of {{solar mass|1.3}} and {{solar mass|0.6}} respectively. The primary is over five hundred times more luminous than the sun. The system shows signs of hot coronal activity, although the primary star is too cool for this. It may originate on the secondary, possibly as material is accreted from the cool giant primary.[11] References1. ^1 2 3 4 5 6 {{cite journal | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653 | year=2007 | last1=Van Leeuwen | first1=F. }} Vizier catalog entry 2. ^1 {{cite journal | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | title=XHIP: An extended hipparcos compilation | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | last1=Anderson | first1=E. | last2=Francis | first2=Ch. }} Vizier catalog entry 3. ^{{cite journal | first1=P. | last1=Keenan | first2=R. | last2=McNeil | title=The Perkins catalog of revised MK types for the cooler stars | journal=Astrophysical Journal Supplement Series | volume=71 | pages=245–266 | date=October 1989 | bibcode=1989ApJS...71..245K | doi=10.1086/191373}} 4. ^1 {{cite journal | bibcode=2006yCat.2168....0M | title=VizieR Online Data Catalog: Homogeneous Means in the UBV System (Mermilliod 1991) | journal=VizieR On-line Data Catalog: II/168. Originally published in: Institut d'Astronomie | volume=2168 | author1=Mermilliod | first1=J. C. | year=2006 }}Vizier catalog entry 5. ^1 {{cite journal|bibcode=2009yCat....102025S|title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)|journal=VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S|volume=1|display-authors=etal|author1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009}} 6. ^{{cite web|title=Gam Phe |url =https://www.aavso.org/vsx/index.php?view=detail.top&oid=26328 |work=The International Variable Star Index |publisher=AAVSO – American Association of Variable Star Observers |access-date=29 January 2018 }} 7. ^{{cite journal | bibcode=1967IAUS...30...57E| title=The Revision of the General Catalogue of Radial Velocities| journal=Determination of Radial Velocities and their Applications| volume=30| pages=57| author1=Evans| first1=D. S.| year=1967}} 8. ^{{cite journal|title=Astrometric orbits of SB9 stars|date=2005|journal=Astronomy and Astrophysics|volume=442|issue=1|pages=365–380|bibcode=2005A&A...442..365J|doi=10.1051/0004-6361:20053003|arxiv=astro-ph/0507695}} 9. ^This is the photocentric semi-major axis, from the motion shown by the observed "star" relative to distant objects, and in practice relative to the barycentre. This is always smaller than the orbital semi-major axis, dramatically smaller when the primary star is much more massive than the secondary or when it is not much brighter. 10. ^{{cite journal | last1=Otero | first1=Sebastián A. | title=New Elements for 54 Eclipsing Binaries | journal=Open European Journal on Variable Stars | volume=72 | issue=1 | pages=1–19 |date=October 2007 | bibcode=2007OEJV...72....1O }} 11. ^1 2 3 {{cite journal|bibcode=2009A&A...498..489J|arxiv=0901.0938|title=Spectroscopic binaries among Hipparcos M giants. III. The eccentricity - period diagram and mass-transfer signatures|journal=Astronomy and Astrophysics|volume=498|issue=2|pages=489|author1=Jorissen|first1=A.|last2=Frankowski|first2=A.|last3=Famaey|first3=B.|last4=Van Eck|first4=S.|year=2009|doi=10.1051/0004-6361/200810703}} Notes{{reflist|group=note}}{{Stars of Phoenix}} 9 : Phoenix (constellation)|M-type giants|Beta Lyrae variables|Slow irregular variables|Bayer objects|Durchmusterung objects|Hipparcos objects|HR objects|Henry Draper Catalogue objects |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。