30 September 2015 to 3 October 2015
Yerevan, Armenia
Etc/GMT+4 timezone

Pulsars with more exactly measured masses as possible candidates of strange stars

3 Oct 2015, 09:40
40m
Main Hall, Guesthouse ()

Main Hall, Guesthouse

Speaker

Prof. Yuri VARTANYAN (Yerevan State University)

Description

The strange quark matter $(SQM)$ has been studied for which the bag model was used. For considered case, it is shown that neutron stars with small mass and configurations consisted of $SQM$ form one family on the curve of dependence of equilibrium superdense star mass on central density of energy $ρ_c$. The groups of the values of constants for bag model were determined, which application results in maximal mass of equilibrium configurations $M_{max}$, that are bigger compared with the recently precisely determined mass of binary radio pulsar $PSR\ \ J0348\div 0432$ equal to $2.01M_{\odot }$. For each series with $M_{max}>2.01M_{\odot }$, for configurations with masses equal to $M_{max}$, and 2.01, 1.97 and 1.44 sun masses, which were determined from observations with high precision, the values of radius, entire number of baryons as well as red sift from the strange star surface depending on $ρ_c$ were calculated. In this case it turns out that all three pulsars with more accurately measured masses may be possible candidates for strange stars.

Primary author

Prof. Yuri VARTANYAN (Yerevan State University)

Co-authors

Dr Alexander GRIGORYAN (Yerevan State University) Hasmik SHAHINYAN (Yerevan State University)

Presentation Materials

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