HD 30963
HD 30963 or HIP22588 is a star with unusual element composition. Compared to the sun, it has 150,000 times more mercury. Manganese is 50×, yttrium 1,000×, zirconium 150× and platinum 2,500× the solar concentration. On the other hand helium is only a fifth the solar abundance, and nickel is down to 10% that of the sun. The classification of the star is a HgMn late B9 type.[1]
HD 30963 has visual magnitude 7.23. It has a slow rotation rate, causing the spectrum to be sharp. The radius is somewhere between 3 and 4 solar radii.[2]
HD 30963 is close to the orbit that the solar system is traversing in the Milky Way. The sun will be close to the current location of HD30963 in about 18.5 million years. Interstellar absorption lines for Na I are present for velocities lower than 10 km/s.[3]
References
- ^ Nowakowski, Tomasz (14 September 2016). "HD 30963 is a chemically peculiar star, study finds".
- ^ Monier, R.; Gebran, M.; Royer, F. (12 September 2016). "HD 30963: A NEW HGMN STAR". arXiv:1609.03542v1.
{{cite journal}}: Cite journal requires|journal=(help) - ^ Wyman, Katherine; Redfield, Seth (20 August 2013). "PROBING OUR HELIOSPHERIC HISTORY. I. HIGH-RESOLUTION OBSERVATIONS OF Na I AND Ca II ALONG THE SOLAR HISTORICAL TRAJECTORY". The Astrophysical Journal. 773 (2): 96. doi:10.1088/0004-637X/773/2/96.