Mixed cold - hot dark matter model with falling and quasiflat initial perturbation spectra

Pogosian, Dimitri Yu; Starobinsky, Alexei A.

doi:10.1086/175890

Mixed cold - hot dark matter model with falling and quasiflat initial perturbation spectra

Sep, 1994

18 pages

Published in:

Astrophys.J. 447 (1995) 465

e-Print:

astro-ph/9409074 [astro-ph]

DOI:

10.1086/175890

Report number:

YITP-U-94-26,
CITA-94-48

View in:

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Abstract: (arXiv)

The mixed cold-hot dark matter cosmological model (CHDM) with

\Omega_{tot}=1

and a falling power-law initial spectrum of Gaussian adiabatic perturbations (

n>1

) is tested using recent obserbational data. It is shown that its fit to the data becomes worse with the growth of

n-1

, and may be considered as unreasonable for

n>1.1

for all possible values of the Hubble constant. Thus, the CHDM model with a falling initial spectrum is worse than the same model with the approximately flat

(|n-1|<0.1)

spectrum. On the other hand, the CHDM model provides a rather good fit to the data if

n

lies in the range

(0.9-1.0)

, the Hubble constant

H_0 < 60

km/s/Mpc (

H_0 < 55

for

n=1

) and the neutrino energy density

\Omega_{\nu}< 0.25

. So, the CHDM model provides the best possibility for the realization of the simplest variants of the inflationary scenario having the effective slope

n\approx (0.95-0.97)

between galaxy and horizon scales, including a modest contribution of primordial gravitational wave background to large-angle

\Delta T/T

fluctuations of the cosmic microwave background (resulting in the increase of their total {\it rms} amplitude by

(5-10)\%

) expected in some variants. A classification of cosmological models according to the number of fundamental parameters used to fit observational data is presented, too.

References(34)

Figures(0)

Cosmology for Grand Unified Theories with Radiatively Induced Symmetry Breaking

- Phys.Rev.Lett. 48 (1982) 1220-1223,
- Adv.Ser.Astrophys.Cosmol. 3 (1987) 158-161 (reprint)
•
DOI:
- 10.1103/PhysRevLett.48.1220

The Statistics of Peaks of Gaussian Random Fields

James M. Bardeen
(
- Washington U., Seattle and
- Santa Barbara, KITP
)
,
J.R. Bond
(
- Stanford U., Phys. Dept. and
- Santa Barbara, KITP
)
,
Nick Kaiser
(
)
,
A.S. Szalay
(
- Fermilab and
- Santa Barbara, KITP
)

- Astrophys.J. 304 (1986) 15-61
•
DOI:
- 10.1086/164143

- Astrophys.J. 364 370

- Astrophys.J. 420 33

- Mon.Not.Roy.Astron.Soc. 265 145

- Mon.Not.Roy.Astron.Soc. 267 323

The statistics of cosmic background radiation fluctuations

J.R. Bond
(
- Toronto U. and
- Cambridge U. and
- Princeton, Inst. Advanced Study
)
,
G. Efstathiou
(
- Toronto U. and
- Cambridge U. and
- Princeton, Inst. Advanced Study
)

- Mon.Not.Roy.Astron.Soc. 226 (1987) 655-687

- Astrophys.J. 405 L5

A Hydrodynamic approach to cosmology: The mixed dark matter cosmological scenario

- Astrophys.J. 431 (1994) 451
•
e-Print:
- astro-ph/9404011
•
DOI:
- 10.1086/174499

- Astrophys.J. 412 L51

High-redshift quasars in the Cold Dark Matter cosmogony

G. Efstathiou
(
- Cambridge U.
)
,
M.J. Rees
(
- Cambridge U.
)

- Mon.Not.Roy.Astron.Soc. 230 (1988) 5-11

On determining the spectrum of primordial inhomogeneity from the COBE dmr sky maps. 2. Results of two year data analysis

K.M. Gorski
(
- NASA, Goddard
)
,
G. Hinshaw
(
- Hughes STX, Greenbelt
)
,
a.J. Banday
(
- NASA, Goddard
)
,
C.L. Bennett
(
- NASA, Goddard
)
,
E.L. Wright
(
- UCLA
)

et al.

- Astrophys.J.Lett. 430 (1994) L89-L92
•
e-Print:
- astro-ph/9403067
•
DOI:
- 10.1086/187445

- Mon.Not.Roy.Astron.Soc. 265 727

- Nature 367 333

Power spectrum constraints from spectral distortions in the cosmic microwave background

Wayne Hu
(
- UC, Berkeley, CfPA
)
,
Douglas Scott
(
- UC, Berkeley, CfPA
)
,
Joseph Silk
(
- UC, Berkeley, CfPA
)

- Astrophys.J.Lett. 430 (1994) L5-L8
•
e-Print:
- astro-ph/9402045
•
DOI:
- 10.1086/187424

Clustering in real space and in redshift space

N. Kaiser
(
- Cambridge U.
)

- Mon.Not.Roy.Astron.Soc. 227 (1987) 1-27
•
DOI:
- 10.1093/mnras/227.1.1

Constraints on models of galaxy formation from the evolution of damped Lyman alpha absorption systems

- Astrophys.J.Lett. 430 (1994) L97
•
e-Print:
- astro-ph/9402015
•
DOI:
- 10.1086/187447

Structure formation with cold plus hot dark matter

- Astrophys.J. 416 (1993) 1-16
•
e-Print:
- astro-ph/9305011
•
DOI:
- 10.1086/173210

Inflation and mixed dark matter models

Andrew R. Liddle
(
- Sussex U.
)
,
David H. Lyth
(
- Lancaster U.
)

- Mon.Not.Roy.Astron.Soc. 265 (1993) 379
•
e-Print:
- astro-ph/9304017
•
DOI:
- 10.1093/mnras/265.2.379

- Phys.Lett.B 108 384

Chaotic Inflation

Andrei D. Linde
(
- Lebedev Inst.
)

- Phys.Lett.B 129 (1983) 177-181,
- Reprinted in *Abbott, L.F. (ed.), Pi, S.Y. (ed.): Inflationary cosmology*, 37-41
•
DOI:
- 10.1016/0370-2693(83)90837-7

Hybrid inflation

Andrei D. Linde
(
- Stanford U., Phys. Dept.
)

- Phys.Rev.D 49 (1994) 748-754
•
e-Print:
- astro-ph/9307002
•
DOI:
- 10.1103/PhysRevD.49.748

- Astrophys.J. 400 L43

Damped Lyman-alpha systems and galaxy formation

H.J. Mo
(
- Cambridge U.
)
,
J. Miralda-Escude
(
- Cambridge U. and
- Princeton, Inst. Advanced Study
)

- Astrophys.J.Lett. 430 (1994) L25
•
e-Print:
- astro-ph/9402014
•
DOI:
- 10.1086/187429

- Mon.Not.Roy.Astron.Soc. 265 507

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