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词条 39 Andromedae
释义

  1. References

  2. External links

{{Starbox begin
| name = 39 Andromedae
}}{{Starbox observe
| epoch = J2000
| constell = Andromeda
| ra = {{RA|01|02|54.25356}}[1]
| dec = {{DEC|+41|20|42.7673}}[1]
| appmag_v = 5.95[3]
}}{{Starbox character
| type =
| class = kA3hA7VmA9[4]
| b-v = {{Val|+0.161|0.009}}[3]
| u-b =
| variable =
}}{{Starbox astrometry
| radial_v = {{Val|+3.1|0.9}}[6]
| prop_mo_ra = −17.558[1]
| prop_mo_dec = −18.400[1]
| parallax = 9.5725
| p_error = 0.0805
| parallax_footnote = [1]
| absmag_v = 0.80[3]
}}{{Starbox detail
| source =
| mass =
| radius = 1.2[11]
| luminosity = 39.95[3]
| temperature = 8,073[13]
| gravity = 3.93[13]
| metal_fe = +0.13[13]
| rotational_velocity = 34[13]
| age_myr =
}}{{Starbox catalog
| names = {{odlist | F=39 And | BD=+40° 209 | FK5= | HD=6116 | HIP=4903 | HR=290 | SAO=36874 | WDS=J01029+4121A }}
}}{{Starbox reference
| Simbad = 39+And
}}{{Starbox end}}39 Andromedae, abbreviated 39 And, is a double star in the northern constellation Andromeda. 39 Andromedae is the Flamsteed designation. Its apparent visual magnitude is 5.95,[3] which indicates it is near the lower limit on visibility to the naked eye. The distance to this star, as estimated from its annual parallax shift of {{Val|9.57|ul=mas}},[1] is 341 light years. It is a suspected member of the Ursa Major Moving Group, although King et al. (2003) list it as a probable non-member.[20]

The brighter component is a confirmed Am star[21] with a stellar classification of kA3hA7VmA9.[4] This notation indicates its spectrum displays the calcium K line of an A3 star, the hydrogen lines of an A7 V, or A-type main-sequence star, and the metal lines of an A9 star. It is radiating 40[3] times the Sun's luminosity from its photosphere at an effective temperature of 8,073 K.[13] As of 2015, the magnitude 12.48 companion star is located at an angular separation of {{Val|20.5|ul=arcsecond}} along a position angle of 3° from the primary.[25]

References

1. ^{{cite DR2}}
2. ^{{citation | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | postscript=. }}
3. ^{{citation | postscript=. | title=Spectral types in the Ursa Major stream | last1=Levato | first1=H. | last2=Abt | first2=H. A. | journal=Publications of the Astronomical Society of the Pacific | volume=90 | pages=429−433 | date=August 1978 | doi=10.1086/130352 | bibcode=1978PASP...90..429L }}
4. ^{{citation | last1=Monier | first1=R. | title=Abundances of a sample of A and F-type dwarf members of the Ursa Major Group | journal=Astronomy and Astrophysics | postscript=. | volume=442 | issue=2 | pages=563–566 | date=November 2005 | doi=10.1051/0004-6361:20053222 | bibcode=2005A&A...442..563M }}
5. ^{{citation | title=Stellar Kinematic Groups. II. A Reexamination of the Membership, Activity, and Age of the Ursa Major Group | journal=The Astronomical Journal | postscript=. | display-authors=1 | last1=King | first1=Jeremy R. | last2=Villarreal | first2=Adam R. | last3=Soderblom | first3=David R. | last4=Gulliver | first4=Austin F. | last5=Adelman | first5=Saul J. | volume=125 | issue=4 | pages=1980 | year=2003 | bibcode=2003AJ....125.1980K | doi=10.1086/368241 }}
6. ^{{citation | last1=de Bruijne | first1=J. H. J. | last2=Eilers | first2=A.-C. | title=Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project | journal=Astronomy & Astrophysics | volume=546 | id=A61 | pages=14 | date=October 2012 | doi=10.1051/0004-6361/201219219 | bibcode=2012A&A...546A..61D | arxiv=1208.3048 | postscript=. }}
7. ^{{citation | last1=Renson | first1=P. | last2=Manfroid | first2=J. | title=Catalogue of Ap, HgMn and Am stars | journal=Astronomy and Astrophysics | postscript=. | volume=498 | issue=3 | pages=961–966 | date=May 2009 | doi=10.1051/0004-6361/200810788 | bibcode=2009A&A...498..961R }}
8. ^{{citation | display-authors=1 | last1=Pasinetti Fracassini | first1=L. E. | last2=Pastori | first2=L. | last3=Covino | first3=S. | last4=Pozzi | first4=A. | title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) | edition=3rd | journal=Astronomy and Astrophysics | volume=367 | pages=521–524 | date=February 2001 | doi=10.1051/0004-6361:20000451 | bibcode=2001A&A...367..521P | arxiv=astro-ph/0012289 | postscript=. }}
9. ^{{citation | display-authors=1 | last1=Mason | first1=B. D. | last2=Wycoff | first2=G. L. | last3=Hartkopf | first3=W. I. | last4=Douglass | first4=G. G. | last5=Worley | first5=C. E. | title=The Washington Visual Double Star Catalog | year=2014 | bibcode=2001AJ....122.3466M | doi=10.1086/323920 }}
[1][2][3][4][5][6][7][8][9]
}}

External links

  • Image ADS 863
{{Stars of Andromeda}}

7 : Double stars|Andromeda (constellation)|Durchmusterung objects|Flamsteed objects|Henry Draper Catalogue objects|Hipparcos objects|HR objects

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