Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Valiviita , Jussi"'
Current and future B-mode polarization data are the most powerful observables to constrain gravitational waves from the early Universe. We set conservative constraints on tensor modes when relaxing the inflationary consistency condition $n_t=-r/8$ be
Externí odkaz:
http://arxiv.org/abs/2208.10482
Autor:
Challinor, Anthony, Allison, Rupert, Carron, Julien, Errard, Josquin, Feeney, Stephen, Kitching, Thomas, Lesgourgues, Julien, Lewis, Antony, Zubeldía, Íñigo, Achucarro, Ana, Ade, Peter, Ashdown, Mark, Ballardini, Mario, Banday, A. J., Banerji, Ranajoy, Bartlett, James, Bartolo, Nicola, Basak, Soumen, Baumann, Daniel, Bersanelli, Marco, Bonaldi, Anna, Bonato, Matteo, Borrill, Julian, Bouchet, François, Boulanger, François, Brinckmann, Thejs, Bucher, Martin, Burigana, Carlo, Buzzelli, Alessandro, Cai, Zhen-Yi, Calvo, Martino, Carvalho, Carla-Sofia, Castellano, Gabriella, Chluba, Jens, Clesse, Sebastien, Colantoni, Ivan, Coppolecchia, Alessandro, Crook, Martin, d'Alessandro, Giuseppe, de Bernardis, Paolo, de Gasperis, Giancarlo, De Zotti, Gianfranco, Delabrouille, Jacques, Di Valentino, Eleonora, Diego, Jose-Maria, Fernandez-Cobos, Raul, Ferraro, Simone, Finelli, Fabio, Forastieri, Francesco, Galli, Silvia, Genova-Santos, Ricardo, Gerbino, Martina, González-Nuevo, Joaquin, Grandis, Sebastian, Greenslade, Joshua, Hagstotz, Steffen, Hanany, Shaul, Handley, Will, Hernandez-Monteagudo, Carlos, Hervías-Caimapo, Carlos, Hills, Matthew, Hivon, Eric, Kiiveri, Kimmo, Kisner, Ted, Kunz, Martin, Kurki-Suonio, Hannu, Lamagna, Luca, Lasenby, Anthony, Lattanzi, Massimiliano, Liguori, Michele, Lindholm, Valtteri, López-Caniego, Marcos, Luzzi, Gemma, Maffei, Bruno, Martinez-González, Enrique, Martins, C. J. A. P., Masi, Silvia, McCarthy, Darragh, Melchiorri, Alessandro, Melin, Jean-Baptiste, Molinari, Diego, Monfardini, Alessandro, Natoli, Paolo, Negrello, Mattia, Notari, Alessio, Paiella, Alessandro, Paoletti, Daniela, Patanchon, Guillaume, Piat, Michel, Pisano, Giampaolo, Polastri, Linda, Polenta, Gianluca, Pollo, Agnieszka, Poulin, Vivian, Quartin, Miguel, Remazeilles, Mathieu, Roman, Matthieu, Rubino-Martin, Jose-Alberto, Salvati, Laura, Tartari, Andrea, Tomasi, Maurizio, Tramonte, Denis, Trappe, Neil, Trombetti, Tiziana, Tucker, Carole, Valiviita, Jussi, Van de Weijgaert, Rien, van Tent, Bartjan, Vennin, Vincent, Vielva, Patricio, Vittorio, Nicola, Young, Karl, Zannoni, Mario
Lensing of the CMB is now a well-developed probe of large-scale clustering over a broad range of redshifts. By exploiting the non-Gaussian imprints of lensing in the polarization of the CMB, the CORE mission can produce a clean map of the lensing def
Externí odkaz:
http://arxiv.org/abs/1707.02259
Autor:
Valiviita, Jussi
Publikováno v:
JCAP 04 (2017) 014
Compensated isocurvature perturbations (CIP), where the baryon and cold dark matter perturbations cancel, do not cause total matter isocurvature perturbation. Consequently, at the linear order in the baryon density contrast $\Delta$, CIP is not detec
Externí odkaz:
http://arxiv.org/abs/1701.07039
Publikováno v:
JCAP 04 (2016) 050
We constrain deviations of the form $T\propto (1+z)^{1+\epsilon}$ from the standard redshift-temperature relation, corresponding to modifying distance duality as $D_L=(1+z)^{2(1+\epsilon)} D_A$. We consider a consistent model, in which both the backg
Externí odkaz:
http://arxiv.org/abs/1512.05346
Autor:
Valiviita, Jussi, Palmgren, Elina
Publikováno v:
JCAP 1507 (2015) 015
We employ the Planck 2013 CMB temperature anisotropy and lensing data, and baryon acoustic oscillation (BAO) data to constrain a phenomenological $w$CDM model, where dark matter and dark energy interact. We assume time-dependent equation of state par
Externí odkaz:
http://arxiv.org/abs/1504.02464
Autor:
Savelainen, Matti, Valiviita, Jussi, Walia, Parampreet, Rusak, Stanislav, Kurki-Suonio, Hannu
Publikováno v:
Phys. Rev. D 88, 063010 (2013)
We use WMAP 9-year and other CMB data to constrain cosmological models where the primordial perturbations have both an adiabatic and a (possibly correlated) neutrino density (NDI), neutrino velocity (NVI), or cold dark matter density (CDI) isocurvatu
Externí odkaz:
http://arxiv.org/abs/1307.4398
Autor:
Valiviita, Jussi, Savelainen, Matti, Talvitie, Marianne, Kurki-Suonio, Hannu, Rusak, Stanislav
Publikováno v:
Astrophys.J. 753 (2012) 151
We constrain cosmological models where the primordial perturbations have both an adiabatic and a (possibly correlated) cold dark matter (CDM) or baryon isocurvature component. We use both a phenomenological approach, where the primordial power spectr
Externí odkaz:
http://arxiv.org/abs/1202.2852
Publikováno v:
Phys.Rev.D80:123516,2009
We present posterior likelihoods and Bayesian model selection analysis for generalized cosmological models where the primordial perturbations include correlated adiabatic and cold dark matter isocurvature components. We perform nested sampling with f
Externí odkaz:
http://arxiv.org/abs/0909.5190
Publikováno v:
Mon. Not. R. Astron. Soc. 402, 2355-2368 (2010)
We use observations of cosmic microwave background anisotropies, supernova luminosities and the baryon acoustic oscillation signal in the galaxy distribution to constrain the cosmological parameters in a simple interacting dark energy model with a ti
Externí odkaz:
http://arxiv.org/abs/0907.4987
Publikováno v:
Mon. Not. R. Astron. Soc. 402, 2344-2354 (2010)
We present a new systematic analysis of the early radiation era solution in an interacting dark energy model to find the adiabatic initial conditions for the Boltzmann integration. In a model where the interaction is proportional to the dark matter d
Externí odkaz:
http://arxiv.org/abs/0907.4981