Search Publications
Warm λ 4 ϕ 4
Videla, Nelson; Panotopoulos, Grigorios
In the present work we show that warm chaotic inflation characterized by a simple
The evolved circumbinary disk of AC Herculis: a radiative transfer, interferometric, and mineralogical study
Min, M.; de Vries, B. L.; Van Winckel, H. +3 more
Context. Many post-asymptotic giant branch (post-AGB) stars in binary systems have an infrared (IR) excess arising from a dusty circumbinary disk. The disk formation, current structure, and further evolution are, however, poorly understood.
Aims: We aim to constrain the structure of the circumstellar material around the post-AGB binary and RV…
C2H observations toward the Orion Bar
Ossenkopf, V.; Nagy, Z.; Bergin, E. A. +3 more
Context. The ethynyl radical (C2H) is one of the first radicals to be detected in the interstellar medium. Its higher rotational transitions have recently become available with the Herschel Space Observatory.
Aims: We aim to constrain the physical parameters of the C2H emitting gas toward the Orion Bar.
Methods: We …
How well can we really determine the scale of inflation?
Özsoy, Ogan; Sinha, Kuver; Watson, Scott
A detection of primordial B modes has been heralded not only as a smoking gun for the existence of inflation, but also as a way to establish the scale at which inflation took place. In this paper we critically reinvestigate the connection between a detection of primordial gravity waves and the scale of inflation. We consider whether the presence o…
First Results from the VIRIAL Survey: The Stellar Content of UVJ-selected Quiescent Galaxies at 1.5 < z < 2 from KMOS
van Dokkum, Pieter G.; Bender, Ralf; Mendel, J. Trevor +14 more
We investigate the stellar populations of 25 massive galaxies (log [{{M}*}/{{M}⊙ }]≥slant 10.9) at 1.5\lt z\lt 2 using data obtained with the K-band Multi-Object Spectrograph (KMOS) on the ESO VLT. Targets were selected to be quiescent based on their broadband colors and redshifts using data from the 3D-HST grism survey. The …
Saturn's variable thermosphere from Cassini/UVIS occultations
Sandel, B. R.; Erwin, J. T.; Strobel, D. F. +3 more
We retrieved the density and temperature profiles in Saturn's thermosphere from 26 stellar occultations observed by the Cassini/UVIS instrument. These results expand upon and complement the previous analysis of 15 Cassini/UVIS solar occultations by Saturn's upper thermosphere. We find that the exospheric temperatures based on the stellar occultati…
The Innermost Mass Distribution of the Gravitational Lens SDP.81 from ALMA Observations
Matsushita, Satoki; Wong, Kenneth C.; Suyu, Sherry H.
The central image of a strongly lensed background source places constraints on the foreground lens galaxy’s inner mass profile slope, core radius, and mass of its nuclear supermassive black hole. Using high-resolution long-baseline Atacama Large Millimeter/submillimeter Array (ALMA) observations and archival Hubble Space Telescope (HST) imaging, w…
Magnetosheath plasma stability and ULF wave occurrence as a function of location in the magnetosheath and upstream bow shock parameters
Escoubet, C. Philippe; Grison, Benjamin; Soucek, Jan
We present the results of a statistical study of the distribution of mirror and Alfvén-ion cyclotron (AIC) waves in the magnetosheath together with plasma parameters important for the stability of ULF waves, specifically ion temperature anisotropy and ion beta. Magnetosheath crossings registered by Cluster spacecraft over the course of 2 years ser…
Catalog of Positions and B Magnitudes of Stars in the Circumpolar Region of Northen Sky Survey (fon) Project
Andruk, V. M.; Pakuliak, L. K.; Golovnia, V. V. +4 more
The catalog of star positions and B-magnitudes for the circumpolar region (from 58° to 90° in declination) of Northern Sky Survey project has been created under the motto of the rational use of resources accumulated in UkrVO JDA (Joint Digital Archive) in MAO NASU. The total amount of processed plates is 477. Digitizing of astronegatives has been …
Contribution of domain wall networks to the CMB power spectrum
Shellard, E. P. S.; Martins, C. J. A. P.; Lazanu, A.
We use three domain wall simulations from the radiation era to the late-time dark energy domination era based on the PRS algorithm to calculate the energy-momentum tensor components of domain wall networks in an expanding universe. Unequal time correlators in the radiation, matter and cosmological constant epochs are calculated using the scaling r…