Photoelectric observation of AD Canis Minoris and the change in its period

Details Photoelectric observation of AD Canis Minoris and the change in its period Photoelectric observation of AD Canis Minoris and the change in its period

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987cha%26a..11..343j&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 11, Issue 4, p. 343-347.

Astronomy and Astrophysics

Astrophysics

9

Scientific paper

I have carried out a large amount of photoelectric observation in the V-band on AD CMi. Small variations in maximum and minimum lights are found. A combined analysis of the 12 maximum times I determined and those by previous workers shows that the pulsation period of this star is continually increasing at a rate equal to (1.89 +/- 0.09) × 10-8 d/yr. From its position in the ``amplitude-period'' diagram, it is inferred that this star has been pulsating for at least 8.6 million years.

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