Hd 24975: A New Delta Scuti Star? (Or A Mild Ap Star with Short Photometric Variations?)
1986 ◽
Vol 90
◽
pp. 253-256
Keyword(s):
Ap Stars
◽
Looking in the literature for short period variations of Ap stars, we found the puzzling case of HD 24975. Used as a comparison star by Weiss (1978), it had been found then to present variations with a peak-to-peak amplitude of 0.01 in U, B and V with a period of about 45mn, but with no clear correlation between the three passbands.HD 24975 has the same spectral type A2 as 21 Com which seems to present photometric variations with P ⋍ 31mn and Δ V < 0,02m (Percy, 1973, 1975). Both stars are near the blue edge of the δ Scuti instability strip in the HR diagram. The lack of photo metric data, however, prevented the precise location of HD 24975 from being found on the HR diagram.
2000 ◽
Vol 176
◽
pp. 477-478
Keyword(s):
Keyword(s):
1993 ◽
Vol 134
◽
pp. 181-183
Keyword(s):
1980 ◽
Vol 92
◽
pp. 696
◽
1987 ◽
Vol 99
◽
pp. 425
◽
1986 ◽
Vol 98
◽
pp. 862
◽
2016 ◽
Vol 466
(1)
◽
pp. 122-128
◽