Balmer jump variations of HD 215441 (Babcock's star)
N. A. Sokolov
TL;DR
This study measures the variability of the Balmer jump in the peculiar star HD 215441 over its cycle, revealing temperature changes and providing insights into its atmospheric properties.
Contribution
It presents new measurements of Balmer jump variations in HD 215441 and compares them with model atmospheres to determine temperature changes.
Findings
Balmer jump varies by about 0.05 dex over the star's cycle.
Temperature estimates range from 14,750 K to 15,750 K at different phases.
The star's atmospheric parameters are characterized by log(g)=3.0.
Abstract
Balmer jump discontinuity of the peculiar star HD 215441 was measured on 14 continuous energy distributions obtained by S. J. Adelman at Kitt Peak National and Palomar Observatories. The results show that the Balmer jump vary by about 0.05 dex over the cycle of the star. A comparison with new Kurucz model atmospheres shown that the Balmer jump for the phase 0.5 corresponds to a 14750 K, log(g)=3.0 and for the phase 1.0 corresponds to a 15750 K, log(g)=3.0.
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomy and Astrophysical Research · Geophysics and Gravity Measurements