BV 690, a new bright Type II Cepheid

N.B.Sanwal; M.B.K.Sarma

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BV 690, a new bright Type II Cepheid

机译：BV 690，一种新的明亮的II型造父变星

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BandVobservations of the suspected variable BV 690 = NSV 04298 are reported. The star shows light variations with a period of ld.2400 and with amplitudes of 0m.27, 0m.36 and 0m.11 inV, B, andB-Vrespectively. The light curves show steeper rise than decline, and there is evidence for the presence of a bump in the descending branch around the phase of 0.35. From considerations of the period, spectral type, presence of the bump and high tangential velocity we conclude that BV 690 belongs to the BL Herculis class of TypenCepheids

机译：报告了可疑变量 BV 690 = NSV 04298 的 BandV 观测值。这颗恒星的光变化周期为ld.2400，振幅分别为0m.27、0m.36和0m.11 inV、B和B-V。光曲线显示上升比下降更陡峭，并且有证据表明在 0.35 相位附近存在下降分支的凸起。通过对周期、光谱类型、凸起的存在和高切向速度的考虑，我们得出结论，BV 690属于造父变星的BL大力神类

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《journal of astrophysics and astronomy》 |1991年第2期|119-131|共页
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N.B.Sanwal; M.B.K.Sarma;
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Osmania University;

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BV 690, a new bright Type II Cepheid

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