Przybylski's star

Starbox begin
name=HD 101065cite web
url=http://cdsweb.u-strasbg.fr/cgi-bin/bibobj?2004A%26A...415..661H&HD+101065
title=V* V816 Cen -- Variable Star
publisher=Centre de Données astronomiques de Strasbourg
accessdate=2008-06-06] Starbox observe
epoch=J2000
ra=RA|11|37|37.0406
dec=DEC|−46|42|34.882
appmag_v=8.02
constell=Centaurus Starbox character
class=B5p
b-v=+0.76cite journal
last=Wegner | first=G.
title=On the reddening and the effective temperature of HD 101065
journal=Monthly Notices of the Royal Astronomical Society
year=1976 | volume=177 | pages=99–108
url=http://adsabs.harvard.edu/abs/1997A&A...323L..49P%7D,
accessdate=2008-06-06 ]
u-b=+0.20
variable= Starbox astrometry
radial_v=10.2
prop_mo_ra=−47.30
prop_mo_dec=33.93
parallax=7.95
p_error=1.07
parallax_footnote= [cite journal
last=Perryman | first=M. A. C. | coauthors="et al"
title=The Hipparcos Catalogue
journal=Astronomy & Astrophysics
year=1997 | volume=323 | pages=L49–L52
url=http://adsabs.harvard.edu/abs/1997A&A...323L..49P%7D,
accessdate=2008-06-06 ]
absmag_v= Starbox detail
mass=
gravity=4.2cite journal
last=Cowley | first=C. R.
coauthors=Ryabchikova, T., Kupka, F., Bord, D. J., Mathys, G., & Bidelman, W. P.
title=Abundances in Przybylski's star
journal=Monthly Notices of the Royal Astronomical Society
year=2000 | volume=317 | issue=2 | pages=299–309
url=http://articles.adsabs.harvard.edu/abs/2000MNRAS.317..299C
accessdate=2008-06-06 ]
radius=
luminosity=
temperature=6,600
metal=
rotation=
age= Starbox catalog
names=V* V816 Cen, CD-46°7232, HD 101065, SAO 222918, HIP 56709.

Przybylski's Star (or HD 101065) is a peculiar star that is located about 410 light years from the Sun in the constellation Centaurus.

In 1961, the Polish-Australian astronomer Antoni Przybylski (pronounced ['anti ^p'blski] roughly equivalent to "jibilski") discovered that this star had a peculiar spectrum that would not fit into the standard framework for stellar classification. [cite journal
last=Przybylski | first=A. | coauthors=Kennedy, P. M.
title=The Spectrum of HD 101065
journal=Publications of the Astronomical Society of the Pacific
year=1963 | volume=74 | issue=445 | pages=349–353
url=http://articles.adsabs.harvard.edu/abs/1963PASP...75..349P
accessdate=2008-06-06 ] Przybylski's observations indicated unusually low amounts of iron and nickel in the star's spectrum, but higher amounts of unusual elements like strontium, niobium, scandium, yttrium, caesium, neodymium, praseodymium, thorium, ytterbium, and uranium. In fact, at first Przybylski doubted that iron was present in the spectrum at all. Modern work shows that the iron-group elements are somewhat below normal in abundance, but it's clear that the lanthanides and other exotic elements are highly overabundant.

According to the [http://www.daviddarling.info/encyclopedia/ETEmain.html Encyclopedia of Astrobiology, Astronomy, and Spaceflight] , Przybylski's Star is...

"One of the most chemically peculiar stars known; it is named informally after its discoverer, the Polish-Australian astronomer, Antoni Przybylski....Apart from the usual lines of hydrogen and the calcium H and K, the strongest lines in HD 101065 are due to singly ionized lanthanides, presenting a spectrum similar to that of an S star, a highly evolved object whose atmosphere is enriched with recently synthesized material from deep within its interior. Yet, in other respects, HD 101065 appears to be a main sequence star or subgiant. One possibility is that it is a cool, extreme Ap star, a theory supported by the discovery of a several kilogauss magnetic field in HD 101065 similar to that of many other Ap stars. The outstanding difficulty with HD 101065 as an Ap star was that its spectrum didn't look like the others. Lines of neutral and first ionized iron are prominent in the spectra of Ap stars, and in some cases, the iron is clearly overabundant." [http://www.daviddarling.info/encyclopedia/P/Przybylskis_Star.html (1)]

References

See also

*Peculiar star
*Normal star

External links

* [http://www.astro.lsa.umich.edu/~cowley/AAS0503CHB/ Actinides in HD 101065 (Przybylski's Star)] by C. R. Cowley, S. Hubrig, and D. J. Bord

* [http://www.astro.lsa.umich.edu/~cowley/przyb.html Przybylski's Most Unusual Star]