Alpha Corvi

{{Starbox begin

| name=Alpha Corvi

}}

{{Starbox observe

| epoch=J2000

| ra={{RA|12|08|24.81727}}

| dec={{DEC|−24|43|43.9521}}

| appmag_v=4.03

| constell=Corvus

}}

{{Starbox character

| class=F1 V + M4 V

| b-v=+0.34

| u-b=+0.00

| variable=Gamma Doradus?

}}

{{Starbox astrometry

| radial_v=+3.0

| prop_mo_ra=+96.976

| prop_mo_dec={{val|-40.023}}

| pm_footnote=

| parallax=66.7696

| p_error=0.1804

| parallax_footnote=

| absmag_v=3.25

}}

{{Starbox detail

| source =

| mass= {{Val|1.34|0.06|0.04}}

| radius={{Val|1.42|0.03}}

| luminosity={{Val|4.31|0.23}}

| temperature={{Val|6985|66|64|fmt=commas}}

| metal_fe={{val|-0.04}}

| gravity= {{Val|4.192|0.030}}

| rotational_velocity={{val|16.9|1.5}}

| age_gyr={{val|1.2|-|1.58}}

}}

{{Starbox catalog

| names=Alchiba, Al Minliar al Ghurab, Al Chiba, 1 Crv, CD−24°10174, GCTP 2796.00, GJ 455.3, GJ 9389, HD 105452, HIP 59199, HR 4623, SAO 180505

}}

{{Starbox reference

|Simbad=alf+Crv

}}

Alpha Corvi (α Corvi, abbreviated Alpha Crv, α Crv), also named Alchiba {{IPAc-en|'|æ|l|k|ɪ|b|ə}}, is an F-type main-sequence star and, despite its "alpha" designation, is the fifth-brightest star in the constellation of Corvus. Based on parallax measurements made by the Gaia mission, it is approximately 49 light-years from the Sun.

Nomenclature

α Corvi (Latinised to Alpha Corvi) is the star's Bayer designation.

It bore the traditional names Al Chiba ({{langx|ar|ألخبا}} {{lang|ar-Latn|al-xibā}}, 'tent') and Al Minliar al Ghurab (Arabic {{lang|ar|منقار الغراب}} {{lang|ar-Latn|al-manxar al-ghurab}}) or Minkar al Ghurab. The latter appeared in the catalogue of stars in the Calendarium of Al Achsasi al Mouakket, which was translated into Latin as {{Lang|la|Rostrum Corvi}}, 'beak of the crow'. In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) to catalogue and standardize proper names for stars. The WGSN approved the name Alchiba for this star on 12 September 2016 and it is now so included in the List of IAU-approved Star Names.

In Chinese astronomy, Alchiba is called {{lang|zh|右轄}}, Pinyin: {{lang|zh-Latn|yòuxiá}}, meaning 'right linchpin', because it stands alone in the 'right linchpin' asterism, Chariot mansion (see: Chinese constellations),{{in lang|zh}} [http://aeea.nmns.edu.tw/2006/0607/ap060722.html AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 22 日] {{Webarchive|url=https://web.archive.org/web/20210225112418/http://aeea.nmns.edu.tw/2006/0607/ap060722.html |date=2021-02-25 }} {{lang|zh|右轄}}, {{lang|zh-Latn|yòuxiá}} was westernized into Yew Hea by R.H. Allen.

=Namesake=

{{USS|Alchiba|AKA-6}} is a former United States Navy ship.

Properties

Alchiba has a spectral class F1V, classifying it as a main sequence star fusing hydrogen into helium at its core. This star exhibits periodic changes in its spectrum over a three-day period, which suggests it is either a spectroscopic binary or (more likely) a pulsating Gamma Doradus-type variable. Alchiba has 34% more mass and is 42% larger than the Sun. It is 4.3 times more luminous and has a surface effective temperature of 6,985 K, giving it the yellow-white hue of an F-type star. The abundance of chemical elements other than hydrogen and helium, what astronomers name metallicity, is slightly lower than that of the Sun.

Alpha Corvi has a common proper motion companion, named Alpha Corvi B (or Alchiba B), located about 3.1 arcsec away. It is a red dwarf with a spectral type of M4V.

References

{{reflist|refs=

{{cite journal | last1=Elgarøy | first1=Øystein | last2=Engvold | first2=Oddbjørn | last3=Lund | first3=Niels | title=The Wilson-Bappu effect of the MgII K line - dependence on stellar temperature, activity and metallicity | journal=Astronomy and Astrophysics | volume=343 | pages=222–228 |date=March 1999 | bibcode=1999A&A...343..222E }}

{{cite web| title=The Colour of Stars | date=December 21, 2004 | work=Australia Telescope, Outreach and Education | publisher=Commonwealth Scientific and Industrial Research Organisation | url=http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html | accessdate=2012-01-16 | archive-date=2013-12-03 | archive-url=https://web.archive.org/web/20131203222826/http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html | url-status=dead }}

{{cite journal

| title=Setting the Stage for the Search for Life with the Habitable Worlds Observatory: Properties of 164 Promising Planet-survey Targets

| last1=Harada | first1=Caleb K. | last2=Dressing | first2=Courtney D.

| last3=Kane | first3=Stephen R. | last4=Ardestani | first4=Bahareh Adami

| journal=The Astrophysical Journal Supplement Series

| volume=272 | issue=2 | at=id. 30 | date=June 2024

| doi=10.3847/1538-4365/ad3e81 | doi-access=free | arxiv=2401.03047

| bibcode=2024ApJS..272...30H | display-authors=1 }}

{{Cite journal |last=Luck |first=R. Earle |date=2017-01-01 |title=Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants |bibcode=2017AJ....153...21L |journal=The Astronomical Journal |volume=153 |issue=1 |pages=21 |doi=10.3847/1538-3881/153/1/21 |doi-access=free |arxiv=1611.02897 |issn=0004-6256}}

{{cite journal|last1=Fuhrmann|first1=K.|last2=Chini |first2=R.|date=2012|title=Multiplicity among F-type Stars|journal=The Astrophysical Journal Supplement|volume=203|issue=2|pages=20|id=30|doi=10.1088/0067-0049/203/2/30 |bibcode=2012ApJS..203...30F|doi-access=free}}

{{cite journal | last=Knobel | first=E. B. | title=Al Achsasi Al Mouakket, on a catalogue of stars in the Calendarium of Mohammad Al Achsasi Al Mouakket | journal=Monthly Notices of the Royal Astronomical Society | volume=55 | page=429 |date=June 1895 | bibcode=1895MNRAS..55..429K | doi=10.1093/mnras/55.8.429 | doi-access=free}}

{{cite book | url=https://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Corvus*.html| first1=Richard Hinckley | last1=Allen | title=Star Names — Their Lore and Meaning: Corvus }}

{{cite journal | display-authors=1 | last1=Gray | first1=R. O. | last2=Corbally | first2=C. J. | last3=Garrison | first3=R. F. | last4=McFadden | first4=M. T. | last5=Bubar | first5=E. J. | last6=McGahee | first6=C. E. | last7=O'Donoghue | first7=A. A. | last8=Knox | first8=E. R. | title=Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample | journal=The Astronomical Journal | volume=132 | issue=1 | pages=161–170 | date=July 2006 | doi=10.1086/504637 | bibcode=2006AJ....132..161G | arxiv=astro-ph/0603770 | s2cid=119476992 }}

{{cite journal | display-authors=1 | last1=Nordström | first1=B. | last2=Andersen | first2=J. | last3=Holmberg | first3=J. | last4=Jørgensen | first4=B. R. | last5=Mayor | first5=M. | last6=Pont | first6=F. | title=The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ~14000 F and G dwarfs | date=2004 | journal=Publications of the Astronomical Society of Australia | volume=21 | issue=2 | pages=129–133 | doi=10.1071/AS04013 | bibcode=2004PASA...21..129N | arxiv=0811.3982| s2cid=123457673}}

{{cite journal | last1=Ammler-von Eiff | first1=Matthias | last2=Reiners | first2=Ansgar | title=New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars? | journal=Astronomy & Astrophysics | arxiv=1204.2459 | volume=542 | page=A116 | date=June 2012 | doi=10.1051/0004-6361/201118724 | bibcode=2012A&A...542A.116A | s2cid=53666672}}

{{cite journal | last=Mermilliod|first=J.-C. | title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) | journal=Catalogue of Eggen's UBV Data | date=1986 | publisher=SIMBAD | bibcode=1986EgUBV........0M }}

{{cite web | url=https://www.iau.org/public/themes/naming_stars/ | title=Naming Stars |publisher=IAU.org |accessdate=16 December 2017}}

{{cite web | url=https://www.iau.org/science/scientific_bodies/working_groups/280/ | title=IAU Working Group on Star Names (WGSN) | publisher=International Astronomical Union | accessdate=22 May 2016 }}

{{cite journal|doi=10.3847/2515-5172/abea23|title= Gaia EDR3 Confirms a Red Dwarf Companion of the nearby F1 Star HD 105452 and Reveals a New Brown Dwarf Companion of the M4.5 Dwarf SCR J1214-2345|last1=Scholz|first1=Ralf-Dieter|journal= Research Notes of the AAS|volume=5|issue=3|id=40|date=2021|page= 40|arxiv=2103.00144|bibcode=2021RNAAS...5...40S|s2cid= 232075955|doi-access= free}}

}}