Tverberg's theorem: Difference between revisions

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{{Starbox begin
The author is called Irwin Wunder but it's not the most masucline title out there. He is truly fond of doing ceramics but he is having difficulties to find time for it. For a whilst she's been in South Dakota. For many years I've been operating as a payroll clerk.<br><br>Here is my page over the counter std test ([http://drupal.12thirty4.com/gmaps/node/4991 why not look here])
| name = Epsilon Corvi
}}
{{Starbox image
| image =
    <div style="position: relative">[[File:Corvus IAU.svg|250px|alt=Diagram showing star positions and boundaries of the Corvus constellation and its surroundings]]
    <div style="position: absolute; left: 58.5%; top: 51.5%">[[File:Cercle rouge 100%.svg|12px]]</div>
    </div>
| caption=Location of ε Corvi (circled)
}}
{{Starbox observe
| epoch    = J2000
| ra      = {{RA|12|10|07.48058}}<ref name=aaa474_2_653/>
| dec      = {{DEC|–22|37|11.1620}}<ref name=aaa474_2_653/>
| appmag_v = +3.024<ref name=aaass22_9/>
| constell = [[Corvus (constellation)|Corvus]]
}}
{{Starbox character
| class    = K2&nbsp;III<ref name=houk1979/>
| b-v      = +1.318<ref name=aaass22_9/>
| u-b      = +1.458<ref name=aaass22_9/>
| variable =
}}
{{Starbox astrometry
| radial_v = +4.9<ref name=scfs/>
| prop_mo_ra  = –71.74
| prop_mo_dec = +10.25
| parallax = 10.26
| p_error  = 0.16
| parallax_footnote = <ref name=aaa474_2_653/>
| absmag_v = –1.82{{+-|0.15|0.14}}<ref name=aj135_3_892/>
}}
{{Starbox detail
| mass    = 3.2<ref name=aaa439_1_227/>
| radius  = 52<ref name=lang2006/>
| luminosity  =
| gravity  = 2.16<ref name=ajss74_1075/>
| temperature = 4,320<ref name=ajss74_1075/>
| metal_fe = –0.13<ref name=ajss74_1075/>
| rotational_velocity = 1.0<ref name=aaa439_1_227/>
| rotation =
| age_myr  =
}}
{{Starbox catalog
| names = 2&nbsp;Crv, [[FK5]]&nbsp;453, [[Henry Draper Catalogue|HD]]&nbsp;105707, [[Hipparcos|HIP]]&nbsp;59316, [[Star catalogue#BS, BSC, HR|HR]]&nbsp;4630, [[Star catalogue#SAO|SAO]]&nbsp;180531.<ref name=SIMBAD/>
}}
{{Starbox end}}
'''Epsilon Corvi''' (ε Crv, ε Corvi) is a [[star]] in the southern [[constellation]] of [[Corvus (constellation)|Corvus]]. It has the traditional name '''Minkar''', from [[Arabic]] '''المنخر''' ''al-mánxar'' meaning "the nostril of the crow"<ref>[http://www.constellationsofwords.com/stars/Minkar.html Constellations of Words - Corvi (Minkar)]</ref> The [[apparent visual magnitude]] is +3.0<ref name=aaass22_9/> and it is located at a distance of {{Convert|318|ly|pc|abbr=off|lk=on}} from [[Earth]].<ref name=aaa474_2_653/>
 
In [[Chinese language|Chinese]], {{lang|zh|軫宿}} ({{lang|zh-Latn|Zhěn Sù}}), meaning ''[[Chariot (Chinese constellation)|Chariot]] (asterism)'', refers to an asterism consisting of ε Corvi, [[Gamma Corvi|γ Corvi]], [[Delta Corvi|δ Corvi]] and [[Beta Corvi|β Corvi]].<ref>{{zh icon}} ''中國星座神話'', written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.</ref> Consequently, ε Corvi itself is known as {{lang|zh|軫宿二}} ({{lang|zh-Latn|Zhěn Sù èr}}, {{lang-en|the Second Star of Chariot}}.).<ref>{{zh icon}} [http://www.lcsd.gov.hk/CE/Museum/Space/Research/StarName/c_research_chinengstars_m.htm 香港太空館 - 研究資源 - 亮星中英對照表], Hong Kong Space Museum. Accessed on line November 23, 2010.</ref>
 
Epsilon Corvi is a [[giant star]] with a [[stellar classification]] of K2&nbsp;III, having consumed the hydrogen at its core and [[stellar evolution|evolved]] away from the [[main sequence]]. It has about three times the Sun's mass.<ref name=aaa439_1_227/> The [[interferometry]]-measured [[angular diameter]] of this star is about 4.99&nbsp;[[milliarcseconds|mas]],<ref name=aaa431_773/> which, at its estimated distance, equates to a physical radius of about 52 times the [[Solar radius|radius of the Sun]].<ref name=lang2006/> The [[effective temperature]] of the outer envelope is 4,320&nbsp;K,<ref name=ajss74_1075/> giving it an orange hue that is characteristic of a K-type star.<ref name=csiro/>
 
== References ==
{{reflist|30em|refs=
 
<ref name=aaa474_2_653>{{citation | first=F. | last=van Leeuwen |date=November 2007 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 |arxiv = 0708.1752 }}</ref>
 
<ref name=ajss74_1075>{{citation | last1=McWilliam | first1=Andrew | title=High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances | journal=Astrophysical Journal Supplement Series | volume=74 | pages=1075–1128 |date=December 1990 | doi=10.1086/191527 | bibcode=1990ApJS...74.1075M }}</ref>
 
<ref name=houk1979>{{citation | title=Michigan catalogue of two-dimensional spectral types for the HD stars | volume=4 | last1=Houk | first1=Nancy | publication-place=Ann Arbor, Michigan | publisher=Dept. of Astronomy, University of Michigan | year=1979 | bibcode=1988mcts.book.....H }}</ref>
 
<ref name=scfs>{{citation | display-authors=1 | title=Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions | last1=Wielen | first1=R. | last2=Schwan | first2=H. | last3=Dettbarn | first3=C. | last4=Lenhardt | first4=H. | last5=Jahreiß | first5=H. | last6=Jährling | first6=R. | publisher=Astronomisches Rechen-Institut Heidelberg | issue=35 | year=1999 | bibcode=1999VeARI..35....1W }}</ref>
 
<ref name=aaass22_9>{{citation | last1=Celis S. | first1=L. | title=Photoelectric photometry of late-type variable stars | journal=Astronomy and Astrophysics Supplement Series | volume=22 | pages=9–17 |date=October 1975 |bibcode = 1975A&AS...22....9C }}</ref>
 
<ref name=aaa439_1_227>{{citation | display-authors=1 | last1=Melo | first1=C. H. F. | last2=de Laverny | first2=P. | last3=Santos | first3=N. C. | last4=Israelian | first4=G. | last5=Randich | first5=S. | last6=Do Nascimento | first6=J. D., Jr. | last7=de Medeiros | first7=J. R. | title=On the nature of lithium-rich giant stars. Constraints from beryllium abundances | journal=Astronomy and Astrophysics | volume=439 | issue=1 | pages=227–235 |date=August 2005 | doi=10.1051/0004-6361:20041805 | bibcode=2005A&A...439..227M |arxiv = astro-ph/0504133 }}</ref>
 
<ref name=aaa431_773>{{citation | last1=Richichi | pages=A. | last2=Percheron | first2=I. | last3=Khristoforova | first3=M. | title=CHARM2: An updated Catalog of High Angular Resolution Measurements | journal=Astronomy and Astrophysics | volume=431 | pages=773–777 |date=February 2005 | doi=10.1051/0004-6361:20042039 | bibcode=2005A&A...431..773R }}</ref>
 
<ref name=lang2006>{{citation | first1=Kenneth R. | last1=Lang | title=Astrophysical formulae | volume=1 | series=Astronomy and astrophysics library | edition=3 | publisher=Birkhäuser | year=2006 | isbn=3-540-29692-1 | url=http://books.google.com/books?id=OvTjLcQ4MCQC&pg=PA41 }}. The radius (R<sub>*</sub>) is given by:
:<math>\begin{align} 2\cdot R_*
& = \frac{(10^{-3}\cdot 97\cdot 4.99)\ \text{AU}}{0.0046491\ \text{AU}/R_{\bigodot}} \\
& \approx 104\cdot R_{\bigodot}
\end{align}</math></ref>
 
<ref name=SIMBAD>{{citation | title=MINKAR -- Variable Star | work=SIMBAD | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Minkar | accessdate=2012-01-24-23 }}</ref>
 
<ref name=csiro>{{citation | 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 }}</ref>
 
<ref name=aj135_3_892>{{citation | display-authors=1 | last1=Carney | first1=Bruce W. | last2=Gray | first2=David F. | last3=Yong | first3=David | last4=Latham | first4=David W. | last5=Manset | first5=Nadine | last6=Zelman | first6=Rachel | last7=Laird | first7=John B. | title=Rotation and Macroturbulence in Metal-Poor Field Red Giant and Red Horizontal Branch Stars | journal=The Astronomical Journal | volume=135 | issue=3 | pages=892–906 |date=March 2008 | doi=10.1088/0004-6256/135/3/892 | bibcode=2008AJ....135..892C |arxiv = 0711.4984 }}</ref>
 
}}
 
{{Stars of Corvus}}
 
[[Category:Corvus (constellation)]]
[[Category:Bayer objects|Corvi, Epsilon]]
[[Category:Stars with proper names]]

Latest revision as of 15:19, 19 August 2014

The author is called Irwin Wunder but it's not the most masucline title out there. He is truly fond of doing ceramics but he is having difficulties to find time for it. For a whilst she's been in South Dakota. For many years I've been operating as a payroll clerk.

Here is my page over the counter std test (why not look here)