New CCD Photometric Study of AM Cnc

TL;DR

This study provides a detailed photometric analysis of the RRab star AM Cnc, revealing the shortest observed Blazhko modulation period and detecting subtle changes in its physical parameters.

Contribution

It presents new observational data on AM Cnc, including the shortest Blazhko period and physical parameter variations, expanding understanding of RRab star behavior.

Findings

Shortest Blazhko modulation period observed: 0.559233 days

Detected small but definite changes in temperature and radius

Compared results with previous literature, confirming new phenomena

Abstract

We present in this paper the new study of variable star AM Cnc, a short period RRab star, in orther to determine, through the light curve and the physical parameters. The Star were observed for a total of 293 sessions shooting, and exhibits light curve modulation, the so called Blazhko effect with the shortest modulation Period=0d.559233 ever observed. We observed this star with the 0,6 mt telescope of the Astronomical Observatory of Andrate (OAA) - To and the result detect small but definite modification in temperature and mean radius of the star itself. All results are compared with previously published literature values and discussed.