His initial research was on the spectroscopy of chemically peculiar stars, whose surface compositions differ markedly from that of the Sun, with the aim of understanding the origin of their anomalies.
22.
"' 49 Arietis "'( abbreviated "'49 Ari "') is a star in the northern constellation of Am, or chemically peculiar star, which means the spectrum displays abnormal abundances of certain heavier elements.
23.
Studies from RAVE either concentrate on peculiar stars and objects or overall trends for the different components of our Galaxy, with a main focus of the structure and formation of the Milky Way.
24.
Many of the cooler chemically peculiar stars are the result of the mixing of nuclear fusion products from the interior of the star to its surface; these include most of the carbon stars and S-type stars.
25.
It is reported as an ??CVn variable with a period of 2.125 days and a magnitude ranging from 4.77 to 4.87, as well as a chemically peculiar star with strong metallic lines in its spectrum.
26.
These hot peculiar stars have been divided into 4 main classes on the basis of their spectra, although two classification systems are sometimes used : mercury-manganese ( HgMn, CP3 ) and helium-weak ( He-weak, CP4 ).
27.
These four came to replace the previous ( up to 2010 ) division in seven sectors : " Sun ", " Solar system ", " Non-stationary stars ", " Stellar atmospheres and envelopes ", " Chemically peculiar stars ", " Stellar clusters ", and " Galaxies ".
