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Updated reduced CMB data and constraints on cosmological parameters
Cai, Rong-Gen; Guo, Zong-Kuan; Tang, Bo
We obtain the reduced CMB data {lA, R, z∗} from WMAP9, WMAP9+BKP, Planck+WP and Planck+WP+BKP for the ΛCDM and wCDM models with or without spatial curvature. We then use these reduced CMB data in combination with low-redshift observations to put constraints on cosmological parameters. We find that including BKP results in a h…
General dissipative coefficient in warm intermediate inflation in Loop Quantum Cosmology in light of Planck and BICEP2
Videla, Nelson; Herrera, Ramón; Olivares, Marco
In this paper, we study a warm intermediate inflationary model with a general form for the dissipative coefficient Γ(T, ϕ) = CϕTm/ϕm-1 in the context of Loop Quantum Cosmology (LQC). We examine this model in the weak and strong dissipative regimes. In general, we discuss in great detail the characteristics of this …
UV surface brightness of galaxies from the local universe to z ~ 5
Scarpa, Riccardo; Falomo, Renato; Lerner, Eric J.
The Tolman test for surface brightness (SB) dimming was originally proposed as a test for the expansion of the universe. The test, which is independent of the details of the assumed cosmology, is based on comparisons of the SB of identical objects at different cosmological distances. Claims have been made that the Tolman test provides compelling e…
BICEP2 constrains composite inflation
Channuie, Phongpichit
In light of BICEP2, we re-examine single field inflationary models in which the inflation is a composite state stemming from various four-dimensional strongly coupled theories. We study in the Einstein frame a set of cosmological parameters, the primordial spectral index ns and tensor-to-scalar ratio r, predicted by such models. We conf…
Recent Developments in Astrophysical and Cosmological Exploitation of Microwave Surveys
Khatri, Rishi; Pointecouteau, Etienne; Toffolatti, Luigi +13 more
In this paper, we focus on the astrophysical results and the related cosmological implications derived from recent microwave surveys, with emphasis to those coming from the Planck mission. We critically discuss the impact of systematic effects and the role of methods to separate the cosmic microwave background (CMB) signal from the astrophysical e…
The Planck Mission: Recent Results, Cosmological and Fundamental Physics Perspectives
Burigana, Carlo; Gruppuso, Alessandro; Natoli, Paolo +1 more
We provide a description of the latest status and performance of the Planck satellite, focusing on the final predicted sensitivity of Planck. The optimization of the observational strategy for the additional surveys following the nominal 15 months of integration (about two surveys) originally allocated and the limitation represented by astrophysic…
Modeling X-Ray Emission of a Straight Jet:. PKS 0920-397
Siemiginowska, A.; Birkinshaw, M.; Worrall, D. M. +14 more
We summarize a study of PKS 0920-397 using our 42 ks Chandra observation in conjunction with our ATCA 20GHz image, and HST/ACS F814W and F475W images. We investigate the hypothesis that the jet X-ray emission is due to inverse-Compton (IC) scattering on the cosmic microwave background (CMB) from the same population of relativistic electrons that g…
Counterpart Candidates to the Unidentified Fermi Source 0FGL J1848.6-0138
Combi, J. A.; Luque-Escamilla, P. L.; Martí, J. +3 more
Here we report the finding of a few counterpart candidates inside the 95% confidence error box of the Fermi LAT unidentified gamma-ray source 0FGL J1848.6-0138. Among them, the globular cluster GLIMPSE-C01 is specially remarkable. It offers a conceivable physical scenario for gamma-ray production and if confirmed to be counterpart it would be the …
Pulse Characterization of GRBs with Known Redshift
Kawai, Nobuyuki; Vasquez, Nicolas
Gamma-ray Bursts (GRBs) are one of the most promising tools in the study of cosmology. The luminosity, energy, light curve parameters and spectral measures could yield to the calibration of standard candles in the Universe. Nevertheless, cosmological and non-cosmological effects are not well understood. Aiming to clarify the possible effects, we s…
X-Ray and Gamma-Ray Observations of the Inner Region of Mgro J2019+37
Paredes, J. M.; Zabalza, V.
In order to better understand the puzzling extended TeV source MGRO J2019+37, we have performed a multiwavelength campaign from radio to X-ray covering most of its extent. Here we present an X-ray mosaic including a new observation and two archival observations performed by the X-ray observatory XMM-Newton. We have also observed the source with th…