Wolf 424
{{Short description|Star in constellation of Virgo}}
{{Sky|12|33|17.38|+|09|01|15.8|14.59}}
{{Starbox begin}}
{{Starbox image
|image={{Location map|100x100|AlternativeMap=Virgo_constellation_map.svg
|alt=Wolf 424 is located in the constellation Virgo.
|caption=Location of Wolf 424 in the constellation Virgo|border=infobox|mark=Red_pog.png|width=300
|label=
Wolf 424
|position=left
|lat=67.3
|long=64.6
}}|caption=
}}
{{Starbox observe
| constell=Virgo
| epoch=J2000
| appmag_v={{nowrap|A: 13.22 ± 0.01}}
{{nowrap|B: 13.21 ± 0.01}}
}}
{{Starbox character
| b-v=
| u-b=
| variable=Flare stars
}}
{{Starbox astrometry
| parallax = 227.041
| p_error = 0.389
}}
{{Starbox astrometry|no_heading=y
| component1 = Wolf 424 A
| prop_mo_ra={{val|-1795.661|fmt=commas}}
| prop_mo_dec={{val|217.789}}
| component2 = Wolf 424 B
| prop_mo_ra2={{val|-1710.468|fmt=commas}}
| prop_mo_dec2={{val|203.098}}
}}
{{Starbox visbin
| primary=Wolf 424 A
| name=Wolf 424 B
| period={{val|{{convert|5772.3|day|year|disp=number}}|{{convert|9.4|day|year|disp=number}}}}
| axis_unitless={{val|0.9167|0.0017|ul="}}
({{val|4.062|0.098|ul=AU}})
| eccentricity={{val|0.301|0.002}}
| inclination={{val|103.3|0.7}}
| node={{val|143.5|0.1}}
| periarg={{val|350.7|0.5}}
| periastron={{val|1992.297|0.056|fmt=none}}
}}
{{Starbox detail
| component1= A
| radius = {{val|0.150|0.019}}
| temperature = {{Val|2966|7|fmt=commas}}
| component2 = B
| mass2 = {{val|0.1258|0.0022}}
| radius2 = {{val|0.153|0.019}}
| temperature2 = {{Val|2966|7|fmt=commas}}
}}
{{Starbox catalog
| names= {{odlist | V=FL Vir | Ci 20=716 | G=12-43 | G2=60-14 | GCRV=7553 | GJ=473 | GSC=00874-00306 | LFT=923 | LHS=333 | LTT=13546 | PLX=2890 | Wolf=424}}, Cl* Melotte 25 EGG 43, USNO-B1.0 0990-00217846, VVO 74, 2E 2769, JP11 5148, JP11 5149
}}
{{Starbox reference
| Simbad=Wolf+424|sn=The system
| Simbad2=Wolf+424+A|sn2=A
| Simbad3=Wolf+424+B|sn3=B
| ARICNS=00975|an=A
| ARICNS2=00976|an2=B
}}
{{Starbox end}}
Wolf 424 is a binary star system comprising two red dwarf stars. The stars are located at a distance of 14.37 light-years and hence are among the nearest stars, but due to their faint intrinsic brightness, they are not visible to the naked eye. Wolf 424 is located in the constellation Virgo, between the stars ε Virginis and ο Virginis.
Description
Image:FLVirLightCurve.png light curve for FL Virginis, adapted from Moffett (1972). The plot shows intensity above the star's quiescent intensity.]]
The close binary nature of this star was discovered by Dutch American astronomer Dirk Reuyl in 1941, based upon an elongation of the star found in photographs. The two stars in the Wolf 424 system orbit about each other with a semi-major axis of 4.1 AU and an eccentricity of 0.3. The stars have an orbital period of 15.5 years and have a combined apparent magnitude of about 12.5.
Wolf 424A and Wolf 424B are similar-spectrum and similar-size stars, both red dwarfs with masses of {{solar mass|link=y|0.138 and 0.126}} and radii of {{solar radius|0.150 and 0.153}}, respectively. In 1967, it was discovered that both are flare stars that undergo random increases in luminosity. The system has been designated FL Virginis, and may experience sunspot activity. The stars may undergo variation in the level of flare activity over periods lasting several years.
{{clear left}}
References
{{reflist|refs=
{{cite simbad|title=V* FL Vir}}
{{Cite Gaia DR3|3902874650602495232}}
{{Cite Gaia DR3|3902874650601954816}}
{{cite constellation|Wolf 424}}
{{cite journal | title=Flare variability in the close binary FL Vir | last=Pettersen | first=B. R. |date=May 2006 | journal=Monthly Notices of the Royal Astronomical Society | volume=368 | issue=3 | pages=1392–1394 | doi=10.1111/j.1365-2966.2006.10210.x | bibcode=2006MNRAS.368.1392P | doi-access=free }}
{{cite web | author=Staff | date=January 1, 2010 | url=http://www.recons.org/TOP100.posted.htm | title=List of the Nearest 100 Stellar Systems | publisher=Research Consortium on Nearby Stars | access-date=2011-07-01 }}
{{cite journal |last1=Chevalier |first1=S. |last2=Babusiaux |first2=C. |display-authors=etal |date=October 2023 |title=Binary masses and luminosities with Gaia DR3 |journal=Astronomy & Astrophysics |volume=678 |issue= |pages=A19 |doi=10.1051/0004-6361/202347111 |arxiv=2307.16719 |bibcode=2023A&A...678A..19C}}
}}
Further reading
- W. D. Heintz, "Astrometric study of 4 binary stars", 1972, Astronomical Journal, 77, 160.
- {{cite book | last = Cohen | first = E. Richard |author2=David R. Lide |author3=George L. Trigg | title = AIP Physics Desk Reference | publisher = Birkhäuser | date = 2003 | pages = 100 | url = https://books.google.com/books?id=JStYf6WlXpgC&pg=PA100 | isbn = 0-387-98973-0}}
External links
- [https://archive.today/20010611082957/http://nemesis.stsci.edu/~kochte/wolf-page.html Wolf 424 Data page]
- [http://www.solstation.com/stars/wolf424.htm Wolf 424 AB]
- [http://www.solstation.com/stars/wolf424.jpg A NASA image of Wolf 424 AB]
{{nearest systems|2}}
{{Virgo}}
{{DEFAULTSORT:Wolf 424}}
Category:M-type main-sequence stars