Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An exact solution of the observable universe in Bianchi V space-time   In this paper we investigate an observable universe in Bianchi type V
space-time by taking into account the cosmological constant as the source of
energy. We have performed a $\chi^{2}$ test to obtain the best fit values of
the model parameters of the universe in the derived model. We have used two
types of data sets, viz: i) 31 values of the Hubble parameter and ii) the 1048
Phanteon data set of various supernovae distance moduli and apparent
magnitudes. From both the data sets, we have estimated the current values of
the Hubble constant, density parameters $(\Omega_{m})_{0}$ and
$(\Omega_{\Lambda})_{0}$. The present value of deceleration parameter of the
universe in derived model is obtained as $q_{0} = 0.59^{+0.04}_{-0.03}$ and
$0.59^{+0.02}_{-0.03}$ in accordance with $H(z)$ and Pantheon data
respectively. Also we observe that there is a signature flipping in the sign of
deceleration parameter from positive to negative and transition red-shift
exists. Thus, the universe in derived model represents a transitioning universe
which is in accelerated phase of expansion at present epoch. We have estimated
the current age of the universe $(t_{0})$ and present value of jerk parameter
$(j_{0})$. Our obtained values of $t_{0}$ and $j_{0}$ are in good agreement
with its values estimated by Plank collaborations and WMAP observations.

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The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
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The categories of this paper are: econ
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The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
37
The categories of this paper are: supr-con