Photometric monitoring of PMS stars with the telescopes at Rozhen Observatory. (arXiv:2311.11627v1 [astro-ph.SR])
<a href="http://arxiv.org/find/astro-ph/1/au:+Semkov_E/0/1/0/all/0/1">Evgeni Semkov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ibryamov_S/0/1/0/all/0/1">Sunay Ibryamov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Peneva_S/0/1/0/all/0/1">Stoyanka Peneva</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mutafov_A/0/1/0/all/0/1">Asen Mutafov</a>
For several decades we have been performing photometric monitoring of some of
the star formation regions. Significant place in our program take observations
of objects of the type FU Orionis, EX Lupi, UX Orionis and other similar but
unclassified objects. These three types of young variable objects show changes
in brightness with large amplitudes and attract the attention of star formation
researchers. But it is not always possible to distinguish them from each other
without the presence of long-term multicolor photometric data. For this reason,
we collect data from current CCD observations and supplement them with data
from the photographic plates archives. In this paper, we show the latest data
from optical photometric studies of four PMS objects (V2493 Cyg, V582 Aur, V733
Cep and V1180 Tau) made at the Rozhen Observatory. Our monitoring is carried
out in $BVRI$ filters, which allows studying the variability in color indexes
also. By analysis the historical light curves of these objects we are trying to
obtain information about the processes associated with the early stages of
stellar evolution.
For several decades we have been performing photometric monitoring of some of
the star formation regions. Significant place in our program take observations
of objects of the type FU Orionis, EX Lupi, UX Orionis and other similar but
unclassified objects. These three types of young variable objects show changes
in brightness with large amplitudes and attract the attention of star formation
researchers. But it is not always possible to distinguish them from each other
without the presence of long-term multicolor photometric data. For this reason,
we collect data from current CCD observations and supplement them with data
from the photographic plates archives. In this paper, we show the latest data
from optical photometric studies of four PMS objects (V2493 Cyg, V582 Aur, V733
Cep and V1180 Tau) made at the Rozhen Observatory. Our monitoring is carried
out in $BVRI$ filters, which allows studying the variability in color indexes
also. By analysis the historical light curves of these objects we are trying to
obtain information about the processes associated with the early stages of
stellar evolution.
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