Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Options for cosmology at redshifts above one   We show that detailed exploration of the $1<z<2$ redshift region can provide
for definitive testing not only of the standard inflationary cosmological
paradigm with its fine-tuned cosmological constant and its mysteriously late
($z<1$) onset of cosmic acceleration, but also for the non fine-tuned,
alternate conformal cosmological model, a cosmology which accelerates both
above and below $z=1$. In particular we confront both of these models with the
currently available type Ia supernovae standard candle and extended FRII radio
source standard yardstick data, with these latter data being particularly
pertinent as they already include a sizeable number of points in the $1<z<2$
region. We find that both models are able to account for all available $0<z<2$
data equally well; and with the conformal model explicitly being able to fit
the data while being an accelerating one in the $z>1$ region, one is thus
currently unable to ascertain whether the universe is accelerating or
decelerating between $z=1$ and $z=2$. To be able to visualize the supernovae
and radio galaxy data simultaneously, we present a representation of the radio
galaxy data in terms of an equivalent apparent magnitude Hubble diagram. We
discuss briefly some implications of the anisotropies in the cosmic microwave
background for the conformal theory, and show that in that theory fluctuations
which set in at around nucleosynthesis can readily generate the first peak in
the anisotropy data.

23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th