2 papers
astro-ph.HE2025
Some problems associated with the standardization of the light curve of type 1a supernovae
A. P. Mahtessian, G. S. Karapetian, H. F. Khachatryan +4
We show that the parameters used to standardize the luminosity of Type 1a supernovae in the SALT2 and SiFTO models are strongly dependent on the redshift z. Consequently, when stan…
astro-ph.GA2017
Merging or division. I. Dependencies between the magnitude gap of groups and the morphology of two brightest galaxies
Abraham P. Mahtessian, Vardan H. Movsisyan, Lazar A. Mahtessian
In the present study, the dependences of the morphological types of the first and second ranked group galaxies on the magnitude gap were studied. It is shown that there is no incre…