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Chemical Analysis of Asymptotic Giant Branch Stars in M62
Dalessandro, E.; Massari, D.; Mucciarelli, A. +4 more
We have collected UVES-FLAMES high-resolution spectra for a sample of 6 asymptotic giant branch (AGB) and 13 red giant branch (RGB) stars in the Galactic globular cluster (GC) M62 (NGC 6266). Here we present the detailed abundance analysis of iron, titanium, and light elements (O, Na, Mg, and Al). For the majority (five out of six) of the AGB targ…
A Compton-thin solution for the Suzaku X-ray spectrum of the Seyfert 2 galaxy Mkn 3
Turner, T. J.; Yaqoob, T.; Tatum, M. M. +2 more
Mkn 3 is a Seyfert 2 galaxy that is widely regarded as an exemplary Compton-thick Active Galactic Nucleus (AGN). We study the Suzaku X-ray spectrum using models of the X-ray reprocessor that self-consistently account for the Fe Kα fluorescent emission line and the associated Compton-scattered, or reflection, continuum. We find a solution in which …
Resolving structure of the disc around HD100546 at 7 mm with ATCA
Wilner, D. J.; van Dishoeck, E. F.; Pinilla, P. +7 more
There is much evidence that planet formation is occurring in the disc around the Herbig Be star HD100546. To learn more about the processes occurring in this disc, we conducted high-resolution imaging at 43/45 GHz with the Australia Telescope Compact Array. Multiple array configurations were used, providing a best spatial resolution of ∼0.15 arcse…
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…