PREDNASAJUCI / LECTURER :

Viktoriia Krushevska

(1) Astronomical Institute, Slovak Academy of Sciences,
059 60 Tatranská Lomnica

NAZOV / TITLE :

Investigation of classical nova V615 Vul

ABSTRAKT / ABSTRACT :

This work presents the results of a study of the classical nova V615 Vul which experienced
an outburst in July 29, 2024. The data analysis is based on our multicolour UBVRI photometric
observations obtained at AI SAS, MAO NASU, and the M. R. Štefánik Observatory in Hlohovec,
supplemented by data from the AAVSO and ASAS-SN databases.
From the resulting light curves, we determined the brightness decline times of the nova by 2
and 3 magnitudes, yielding values of t2(V) = 5 d, t3(V) = 10 d, and t3(B) = 13 days which
corresponds to fast novae.
We also examined short-term brightness fluctuations observed on the 35th day after the
eruption and identified a periodicity of 0.224 days, which we interpret as the orbital period
of nova V615 Vul.
In addition, we calculated color indices, constructed tracks of the nova on two-color diagrams
and provided their interpretation, determined the absolute magnitude, as well as estimated
the mass of the white dwarf and the distance to the nova.