摘要
对29颗Be星作了近红外JHK宽波段测光。所选对象多少有些特殊性。其中19颗有或可能有快周期光变,6颗是Be/x射线双星。观测用光学天文开放实验室北台兴隆站1.26米红外望远镜。观测结果表明相当多的星有较大的红外超,其中8颗星的J-K值大于0.5;有3颗星有较明显变化,△(J-K)大于0.4。
Near-infrared photometry in the JHK broadbands is presented for 29 Be stars including 19 stars with rapid variability and 6 stars belonging to Be / X-ray binaries. The observations were obtained with 126cm infrared telescope using a liquid nitrogen cooled InSb photometer at Beijing observatory in Nov. 1992 and Nov. 1993. The results of the measurements are listed in Table 1. The star names and MK spectral types are given in columns 1 and 2. The Julian dates correspend to the times of mid observations are given in column 3. The JHK magnitudes are listed in columns 5-6 and the calculated J-K values are listed in column 7. It is interested to point out that there are 8 stars: KX And, HD 1389(?), HD 14422, X Per, HD 39340, Psi Per, LSI 61303 and HD 245770, of which the values of J-K were more than 0.5 and there are 3 stars: HD 13890, X Per and 17 Tau, of which the variabilities of J-K were more than 0.4.
