Biplob Sarkar

9 Questions 22 Answers 0 Followers

Questions related from Biplob Sarkar

This question is on X-ray data analysis of the low-mass X-ray binary neutron star sources?

Suppose, in a particular X-ray observation data set for a particular low-mass X-ray binary neutron star source, we find no QPO features, thermonuclear burst features or strong X-ray...

29 April 2020 7,958 0 View

What are the popular plotting softwares that astromomers and astrophysicists use for publication? I am using XMGRACE and GNUPLOT? What about Matlab?

Supermongo and IDL are also very popular among astrophysicists. Are Matlab, Mathematica, Xmgrace, Gnuplot also popular among some groups?

23 January 2015 4,596 12 View

Are jets in AGNs or X-ray binaries leptonic e- - e+, or they can they be also baryonic?

In the literature we find that relativistic e- - e+ jets are not possible. For truly relativistic jests, we need to have e- - p pairs.

23 September 2014 1,291 3 View

What is the Rayleigh Taylor Stability criterion in the case of a rotating viscous fluid?

Why does the outward increase of angular momentum in an accretion disk make the disk Rayleigh stable? Since the density profile in an accretion disk increases inward in the case of constant...

08 March 2014 4,974 3 View

When we receive X-ray data in our satellite sensors, what is the probability density function of the error involved in the raw data?

What will be the statistical properties of the error present in the signal?

17 February 2014 5,147 3 View

What is the order of number density of electrons in the plasma of accretion disks around compact objects?

It is of the order of 1 m^−3 (intergalactic medium) to 10^30 m^-3 (stellar core). My calculations show that it should be of the order of 10^23 m^-3. Is my order of magnitude alright?

22 January 2014 1,173 1 View

What is the typical order of strength of the magnetic field in Gauss in a black hole Accretion Disk?

It may be a binary black hole accretion disk or an AGN.

31 October 2013 9,160 6 View

Could someone explain what causes the high/soft to low/hard and vice versa state transitions in black hole candidates?

How does the mass accretion rate affect these transitions? Further can the hardening or softening of the spectrum in the accretion be related to the changes in the shock properties in accretion...

03 October 2013 8,986 2 View

In a collapsar accretion disk or in binary accretion disks, what can be the magnitude of the gas and radiation pressure measured in cgs or SI units?

Also, in the accretion disks dominated by magnetic pressure what is the order of this magnetic pressure in cgs units? Also what is the order of the magentic field in Gauss? And finally are the...

24 September 2013 8,814 1 View