Search Publications
Missions
Journals
Publication Years
Parsec-scale Radio Emission from the Low-luminosity Active Galactic Nucleus in the Dwarf Starburst Galaxy Henize 2-10
Deller, Adam T.; Reines, Amy E.
A candidate accreting massive black hole (BH) with M BH ~ 106 M ⊙ has recently been identified at the center of the dwarf starburst galaxy Henize 2-10 (He 2-10). This discovery offers the first possibility of studying a growing BH in a nearby galaxy resembling those in the earlier universe, and opens up a new class…
Evidence for Environmental Changes in the Submillimeter Dust Opacity
Devlin, Mark J.; Halpern, Mark; Miville-Deschênes, Marc-Antoine +25 more
The submillimeter opacity of dust in the diffuse interstellar medium (ISM) in the Galactic plane has been quantified using a pixel-by-pixel correlation of images of continuum emission with a proxy for column density. We used multi-wavelength continuum data: three Balloon-borne Large Aperture Submillimeter Telescope bands at 250, 350, and 500 &micr…
The Link between the Hidden Broad Line Region and the Accretion Rate in Seyfert 2 Galaxies
Goulding, Andy D.; Nicastro, Fabrizio; Bianchi, Stefano +2 more
In the past few years, more and more pieces of evidence have been presented for a revision of the widely accepted unified model of active galactic nuclei. A model based solely on orientation cannot explain all the observed phenomenology. In the following, we will present evidence that accretion rate is also a key parameter for the presence of hidd…
"TNOs are Cool": A survey of the trans-Neptunian region. IV. Size/albedo characterization of 15 scattered disk and detached objects observed with Herschel-PACS
Fornasier, S.; Hartogh, P.; Lellouch, E. +20 more
Context. Physical characterization of trans-Neptunian objects, a primitive population of the outer solar system, may provide constraints on their formation and evolution.
Aims: The goal of this work is to characterize a set of 15 scattered disk (SDOs) and detached objects, in terms of their size, albedo, and thermal properties.
Methods: …
The GUMICS-4 global MHD magnetosphere-ionosphere coupling simulation
Janhunen, P.; Laitinen, T.; Facskó, G. +4 more
GUMICS-4 is a global magnetosphere-ionosphere coupling simulation based on global MHD magnetosphere and an electrostatic ionosphere. Here we review the development history, design and technical features of GUMICS-4 as well as a number of its postprocessing tools. We also compare GUMICS-4 predictions with observations for magnetopause distance, int…
Improved models for cosmic infrared background anisotropies: new constraints on the infrared galaxy population
Knox, Lloyd; Oh, S. Peng; Shang, Cien +1 more
The power spectrum of cosmic infrared background (CIB) anisotropies is sensitive to the connection between star formation and dark matter haloes over the entire cosmic star formation history. Here we develop a model that associates star-forming galaxies with dark matter haloes and their subhaloes. The model is based on a parametrized relation betw…
The enigmatic nature of the circumstellar envelope and bow shock surrounding Betelgeuse as revealed by Herschel. I. Evidence of clumps, multiple arcs, and a linear bar-like structure
Blommaert, J. A. D. L.; Gomez, H. L.; Barlow, M. J. +13 more
Context. The interaction between stellar winds and the interstellar medium (ISM) can create complex bow shocks. The photometers on board the Herschel Space Observatory are ideally suited to studying the morphologies of these bow shocks.
Aims: We aim to study the circumstellar environment and wind-ISM interaction of the nearest red supergiant,…
Applications of a new set of methane line parameters to the modeling of Titan’s spectrum in the 1.58 µm window
Drossart, Pierre; Bézard, Bruno; Lellouch, Emmanuel +11 more
In this paper we apply a recently released set of methane line parameters (Wang et al., 2011) to the modeling of Titan spectra in the 1.58 µm window at both low and high spectral resolution. We first compare the methane absorption based on this new set of methane data to that calculated from the methane absorption coefficients derived in sit…
Precision simulation of ground-based lensing data using observations from space
Leauthaud, Alexie; Rhodes, Jason; Mandelbaum, Rachel +2 more
Current and upcoming wide-field, ground-based, broad-band imaging surveys promise to address a wide range of outstanding problems in galaxy formation and cosmology. Several such uses of ground-based data, especially weak gravitational lensing, require highly precise measurements of galaxy image statistics with careful correction for the effects of…
Are Nuclear Star Clusters the Precursors of Massive Black Holes?
Neumayer, Nadine; Walcher, C. Jakob
We present new upper limits for black hole masses in extremely late type spiral galaxies. We confirm that this class of galaxies has black holes with masses less than 10^6 Msolar, if any. We also derive new upper limits for nuclear star cluster (NC) masses in massive galaxies with previously determined black hole masses. We use the newly derived u…