SIMBAD references

2006BaltA..15..363A - Baltic Astronomy, 15, 363-381 (2006/September-0)

Bvri photometry of NZ Gem, HD 73017, HD 77247, RT Vir and 104 Her.

ADELMAN S.J. and HARRELL W.L.

Abstract (from CDS):

We examined single channel differential BVRI photometry of the cool stars NZ Gem, HD 73017, HD 77247, RT Vir and 104 Her obtained by the first author with the Four College Automated Photoelectric Telescope with of order 100 observations taken over two or more years. Four of these stars are Small-Amplitude Red Variables (SARVs). The primary period of NZ Gem (M3II-IIIs) is about 33.70 days. HD 77247, the shortest period barium star with spectral type K0, has a photometric period of about 82 days which is close to its binary period of 80.53 days. Its check star HD 73017, a non-variable in B, V and R, is variable in I due most likely to a previously unknown cooler companion. RT Vir (M8III) is found to be a multiperiodic star whose observations are consistent with the 155 day primary period of Lebzelter & Hinkle (2002). 104 Her (M3III) is also multiperiodic with a primary period of 21.48 days.

Abstract Copyright:

Journal keyword(s): stars: variable: general - stars: individual (NZ Gem, HD 73017, HD 77247, RT Vir, 104 Her) - stars: binaries

Simbad objects: 12

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2020.09.19-18:54:19

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