| 词条 | Psi Phoenicis |
| 释义 |
| name = ψ 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=Psi Phoenicis |x=226|y=308 }} |caption=Location of ψ Phoenicis (circled) }}{{Starbox observe | epoch = J2000 | constell = Phoenix | ra = {{RA|01|53|38.74103}}[1] | dec = {{DEC|-46|18|09.6048}}[1] | appmag_v = 4.41[2] (4.3 - 4.5[3]) }}{{Starbox character | class = M4III[4] | b-v = +1.59[2] | u-b = +1.71[2] | variable = SR[3] }}{{Starbox astrometry | radial_v = +2.90[5] | prop_mo_ra = -93.16[1] | prop_mo_dec = -91.17[1] | parallax = 9.54 | p_error = 0.19 | parallax_footnote = [1] | absmag_v = -0.71[4] }}{{Starbox detail |mass=1.3 ± 0.2[14]|radius=86 ± 3[14] | temperature = 3,586[6] | luminosity = 1050{{±|150|140}}[14] | gravity = 0.68{{±|0.10|0.11}}[14] | metal_fe = −1.24 ± 0.39[19] |rotational_velocity=3.9 ± 0.9[20] | age_gyr = 4.9[6] }}{{Starbox catalog | names = CD−46°552, FK5 67, GC 2303, HIP 8837, HR 555, HD 11695, SAO 215696 }}{{Starbox reference | Simbad = Psi+Phoenicis }}{{Starbox end}}Psi Phoenicis (ψ Phoenicis) is a star in the constellation Phoenix. Its apparent magnitude varies from 4.3 to 4.5 with a period of about 30 days[3] and it is approximately 342 light years away based on parallax.[1] Psi Phoenicis is a red giant in the asymptotic branch with a spectral type of M4III, indicating it is an evolved star in the last evolutionary stage before becoming a white dwarf. In 1973 astronomer Olin J. Eggen discovered it is a variable star, varying in magnitude between 4.3 and 4.5 with an approximate period of 30 days.[25] A more recent study identified two possible periods of 43.7 and 48.1 days, with amplitudes of 0.038 and 0.023 magnitudes.[26] The star is classified as a semiregular variable, of no specific subtype.[3] In 2001, Psi Phoenicis was observed by the VLT Interferometer with the test instrument VINCI. The observations, in combination with stellar atmospheric models, detected the limb darkening effect on the star's disk and found an angular diameter of {{val|8.13|0.2|ul=mas}}, corresponding to a stellar radius of {{val|86|3|ul=solar radii}}. From the radius and estimating an effective temperature of {{val|3,550|ul=K}}, a luminosity of 1,000 times the solar luminosity was calculated.[14] A 2008 study reanalyzed the interferometric data with a new atmospheric model, finding an angular diameter of {{val|10.15|0.15|u=mas}} and a radius of {{val|85|1.6|ul=solar radius}}.[29] By having directly measured distance, radius and luminosity, Psi Phoenicis was included in a list of 34 well characterized stars to be used as a reference. This program made the first measurement of the metallicity of Psi Phoenicis, showing it is a metal-poor star with only 5% the amount of iron of the Sun ([Fe/H] = {{val|-1.24|0.39}}). This value has a large uncertainty due to the difficulties in modeling the spectra of cool stars, which have strong molecular absorption. The evolutionary state and poorly constrained metallicity result in an uncertain mass of {{val|1.0|0.4|ul=solar mass}}.[19][31] Assuming a metallicity closer to solar, a mass of {{val|1.3|0.2|u=solar mass}} is derived.[14] Psi Phoenicis is considered a single star, and has no known companions.[14][34] It has been considered a possible spectroscopic binary, including in the Hipparcos Catalogue, which stems from spectroscopic observations in 1919 which showed a possibly variable radial velocity. More recent data, however, showed the velocity to be constant.[14] References1. ^1 2 3 4 5 {{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=653–664 | year=2007 | last1=Van Leeuwen | first1=F. }} Vizier catalog entry [7][8][9][10][11][12][13][14]2. ^1 2 {{cite journal |bibcode=2002yCat.2237....0D |title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system |journal=CDS/ADC Collection of Electronic Catalogues |volume=2237 |author1=Ducati |first1=J. R. |year=2002 }} 3. ^1 2 3 {{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}} 4. ^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 5. ^{{Cite journal | doi=10.1134/S1063773706110065 | bibcode=2006AstL...32..759G| title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system| journal=Astronomy Letters| volume=32| issue=11| pages=759–771| year=2006| last1=Gontcharov| first1=G. A.|arxiv = 1606.08053 }} 6. ^1 {{cite journal | bibcode=2014MNRAS.443..698S | doi=10.1093/mnras/stu1072 |arxiv=1311.5558 | title=Fundamental stellar parameters and metallicities from Bayesian spectroscopy: Application to low- and high-resolution spectra | journal=Monthly Notices of the Royal Astronomical Society | volume=443 | issue=1 | pages=698 | year=2014 | last1=Schonrich | first1=R. | last2=Bergemann | first2=M. }} 7. ^1 {{citation | title=The classification of intrinsic variables. IV. Very-small-amplitude, very-short-period red variables | last1=Eggen | first1=O. J. | postscript=. | journal=Astrophysical Journal | volume=184 | page=793 | year=1973 | doi=10.1086/152371 | bibcode=1973ApJ...184..793E }} 8. ^1 {{citation | display-authors=1 | last1=Tabur | first1=V. | last2=Bedding | first2=T. R. | last3=Kiss | first3=L. L. | last4=Moon | first4=T. T. | last5=Szeidl | first5=B. | last6=Kjeldsen | first6=H. | title=Long-term photometry and periods for 261 nearby pulsating M giants | journal=Monthly Notices of the Royal Astronomical Society | volume=400 | issue=4 | pages=1945–1961 | doi=10.1111/j.1365-2966.2009.15588.x | bibcode=2009MNRAS.400.1945T | postscript=. |arxiv = 0908.3228 |date=December 2009}} 9. ^1 2 3 4 5 6 7 8 {{cite journal|bibcode=2004A&A...413..711W|title=Tests of stellar model atmospheres by optical interferometry. VLTI/VINCI limb-darkening measurements of the M4 giant ψ Phe|journal=Astronomy and Astrophysics|volume=413|issue=2|pages=711–723|last1=Wittkowski|first1=M.|last2=Aufdenberg|first2=J. P.|last3=Kervella|first3=P.|year=2004|arxiv=astro-ph/0310128|doi=10.1051/0004-6361:20034149}} 10. ^1 {{cite journal | author=Neilson, Hilding R. | author2=Lester, John B. | date=2008 | title=Determining parameters of cool giant stars by modeling spectrophotometric and interferometric observations using the SAtlas program | journal= Astronomy and Astrophysics | volume=490|issue=2 | pages=807–10 | bibcode=2008A&A...490..807N | doi=10.1051/0004-6361:200810627|arxiv = 0809.1875 }} 11. ^1 {{citation | title=Gaia FGK benchmark stars: Effective temperatures and surface gravities | journal=Astronomy & Astrophysics | last1=Heiter | first1=U. | last2=Jofré | first2=P. | last3=Gustafsson | first3=B. | last4=Korn | first4=A. J. | last5=Soubiran | first5=C. | last6=Thévenin | first6=F. | volume=582 | pages=A49 | year=2015 | doi=10.1051/0004-6361/201526319 | bibcode=2015A&A...582A..49H | arxiv=1506.06095 | postscript=. }} 12. ^1 2 {{cite journal|bibcode=2014A&A...564A.133J|title=Gaia FGK benchmark stars: Metallicity|journal=Astronomy and Astrophysics|volume=564|pages=A133|last1=Jofré|first1=P.|last2=Heiter|first2=U.|last3=Soubiran|first3=C.|last4=Blanco-Cuaresma|first4=S.|last5=Worley|first5=C. C.|last6=Pancino|first6=E.|last7=Cantat-Gaudin|first7=T.|last8=Magrini|first8=L.|last9=Bergemann|first9=M.|last10=González Hernández|first10=J. I.|last11=Hill|first11=V.|last12=Lardo|first12=C.|last13=De Laverny|first13=P.|last14=Lind|first14=K.|last15=Masseron|first15=T.|last16=Montes|first16=D.|last17=Mucciarelli|first17=A.|last18=Nordlander|first18=T.|last19=Recio Blanco|first19=A.|last20=Sobeck|first20=J.|last21=Sordo|first21=R.|last22=Sousa|first22=S. G.|last23=Tabernero|first23=H.|last24=Vallenari|first24=A.|last25=Van Eck|first25=S.|year=2014|arxiv=1309.1099|doi=10.1051/0004-6361/201322440}} 13. ^1 {{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 |date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E | postscript=. |arxiv = 0806.2878 }} 14. ^1 {{citation | display-authors=1 | title=Rotational velocities of the giants in symbiotic stars - III. Evidence of fast rotation in S-type symbiotics | last1=Zamanov | first1=R. K. | last2=Bode | first2=M. F. | last3=Melo | first3=C. H. F. | last4=Stateva | first4=I. K. | last5=Bachev | first5=R. | last6=Gomboc | first6=A. | last7=Konstantinova-Antova | first7=R. | last8=Stoyanov | first8=K. A. | journal=Monthly Notices of the Royal Astronomical Society | volume=390 | issue=1 | pages=377–382 | date=October 2008 | doi=10.1111/j.1365-2966.2008.13751.x | bibcode=2008MNRAS.390..377Z | arxiv=0807.3817 | postscript=. }} }}{{Stars of Phoenix}} 8 : Phoenix (constellation)|M-type giants|Semiregular variable stars|Bayer objects|Durchmusterung objects|Hipparcos objects|HR objects|Henry Draper Catalogue objects |
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