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HD 4612


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The MAIA candidate star HD 208727
HD 208727 is a suspected member of the enigmatic MAIA variables andshows the largest yet observed amplitude in light variation for any ofthe potential members. Proven beyond doubt pulsation would pose aserious problem for stellar modelling and opacities, because eitheropacity source for driving pulsation has to be a different or newidentified, yet unkown, pulsation mechanism. We conclude from ourinvestigation that rotation is a more likely explanation for the lightvariability of HD 208727.

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Intensities of the resonance lines of neutral and ionized magnesium in stellar spectra
Empirical curves giving the dependence of the equivalent widths of thedoublet 2800 Mg II and the line 2852 Mg I on the spectral class havebeen plotted. Some features of the behavior of these lines in thespectra of stars of the spectral classes A-K have been analyzed. Thelines 2795 Mg II and 2852 Mg I have been used to determine the meanelectron concentration ne(Mg) in the atmospheres of 87 stars of thespectral classes B8-K4.

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Observation and Astrometry data

Constellation:Cassiopée
Right ascension:00h49m16.13s
Declination:+68°28'02.1"
Apparent magnitude:8.123
Distance:671.141 parsecs
Proper motion RA:-7.7
Proper motion Dec:-2.5
B-T magnitude:8.472
V-T magnitude:8.152

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 4612
TYCHO-2 2000TYC 4296-520-1
USNO-A2.0USNO-A2 1575-00493718
HIPHIP 3839

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