Science Archives Publication System

67P/Churyumov-Gerasimenko: Activity between March and June 2014 as observed from Rosetta/OSIRIS

DOI: 10.1051/0004-6361/201424735 Bibcode: 2015A&A...573A..62T

Jorda, L.; Lamy, P. L.; Bertaux, J. -L. +47 more

Aims: 67P/Churyumov-Gerasimenko is the target comet of the ESA's Rosetta mission. After commissioning at the end of March 2014, the Optical, Spectroscopic, and Infrared Remote Imaging System (OSIRIS) onboard Rosetta, started imaging the comet and its dust environment to investigate how they change and evolve while approaching the Sun.
Me…

2015 • Astronomy and Astrophysics

Rosetta 64

Large-Eddy Simulations of Magnetohydrodynamic Turbulence in Heliophysics and Astrophysics

DOI: 10.1007/s11214-015-0190-7 Bibcode: 2015SSRv..194...97M

Brandenburg, Axel; Velli, Marco; Toomre, Juri +9 more

We live in an age in which high-performance computing is transforming the way we do science. Previously intractable problems are now becoming accessible by means of increasingly realistic numerical simulations. One of the most enduring and most challenging of these problems is turbulence. Yet, despite these advances, the extreme parameter regimes …

2015 • Space Science Reviews

Cluster 64

NuSTAR and Suzaku X-ray Spectroscopy of NGC 4151: Evidence for Reflection from the Inner Accretion Disk

DOI: 10.1088/0004-637X/806/2/149 Bibcode: 2015ApJ...806..149K

Harrison, F. A.; Stern, D.; Fabian, A. C. +19 more

We present X-ray timing and spectral analyses of simultaneous 150 ks Nuclear Spectroscopic Telescope Array (NuSTAR) and Suzaku X-ray observations of the Seyfert 1.5 galaxy NGC 4151. We disentangle the continuum emission, absorption, and reflection properties of the active galactic nucleus (AGN) by applying inner accretion disk reflection and absor…

2015 • The Astrophysical Journal

Suzaku 64

Extended hard-X-ray emission in the inner few parsecs of the Galaxy

DOI: 10.1038/nature14353 Bibcode: 2015Natur.520..646P

Hailey, Charles J.; Mori, Kaya; Bauer, Franz E. +19 more

The Galactic Centre hosts a puzzling stellar population in its inner few parsecs, with a high abundance of surprisingly young, relatively massive stars bound within the deep potential well of the central supermassive black hole, Sagittarius A* (ref. 1). Previous studies suggest that the population of objects emitting soft X-rays (less than 10 kilo…

2015 • Nature

XMM-Newton 64

Nested Shells Reveal the Rejuvenation of the Orion-Eridanus Superbubble

DOI: 10.1088/0004-637X/808/2/111 Bibcode: 2015ApJ...808..111O

Brown, Anthony G. A.; Bally, John; Ochsendorf, Bram B. +1 more

The Orion-Eridanus superbubble is the prototypical superbubble owing to its proximity and evolutionary state. Here we provide a synthesis of recent observational data from WISE and Planck with archival data, allowing us to draw a new and more complete picture on the history and evolution of the Orion-Eridanus region. We discuss the general morphol…

2015 • The Astrophysical Journal

Planck 64

Cosmic Evolution of Black Holes and Spheroids. V. The Relation between Black Hole Mass and Host Galaxy Luminosity for a Sample of 79 Active Galaxies

DOI: 10.1088/0004-637X/799/2/164 Bibcode: 2015ApJ...799..164P

Treu, Tommaso; Auger, Matthew W.; Malkan, Matthew A. +3 more

We investigate the cosmic evolution of the black hole (BH) mass-bulge luminosity relation using a sample of 52 active galaxies at z ~ 0.36 and z ~ 0.57 in the BH mass range of 10^7.4-10^9.1 M _⊙. By consistently applying multicomponent spectral and structural decomposition to high-quality Keck spectra and high-resolut…

2015 • The Astrophysical Journal

eHST 64

Beyond Ellipse(s): Accurately Modelling the Isophotal Structure of Galaxies with ISOFIT and CMODEL

DOI: 10.1088/0004-637X/810/2/120 Bibcode: 2015ApJ...810..120C

Ciambur, B. C.

This work introduces a new fitting formalism for isophotes that enables more accurate modeling of galaxies with non-elliptical shapes, such as disk galaxies viewed edge-on or galaxies with X-shaped/peanut bulges. Within this scheme, the angular parameter that defines quasi-elliptical isophotes is transformed from the commonly used, but inappropria…

2015 • The Astrophysical Journal

eHST 64

The Brightest Young Star Clusters in NGC 5253.

DOI: 10.1088/0004-637X/811/2/75 Bibcode: 2015ApJ...811...75C

Schaerer, D.; Östlin, G.; Herrero, A. +43 more

The nearby dwarf starburst galaxy NGC 5253 hosts a number of young, massive star clusters, the two youngest of which are centrally concentrated and surrounded by thermal radio emission (the “radio nebula”). To investigate the role of these clusters in the starburst energetics, we combine new and archival Hubble Space Telescope images of NGC 5253 w…

2015 • The Astrophysical Journal

eHST 64

Geomorphology of the Imhotep region on comet 67P/Churyumov-Gerasimenko from OSIRIS observations

DOI: 10.1051/0004-6361/201525947 Bibcode: 2015A&A...583A..35A

Jorda, L.; Lamy, P. L.; Lara, L. M. +48 more

Context. Since August 2014, the OSIRIS Narrow Angle Camera (NAC) onboard the Rosetta spacecraft has acquired high spatial resolution images of the nucleus of comet 67P/Churyumov-Gerasimenko, down to the decimeter scale. This paper focuses on the Imhotep region, located on the largest lobe of the nucleus, near the equator.
Aims: We map, invent…

2015 • Astronomy and Astrophysics

Rosetta 64

Strong C⁺ Emission in Galaxies at z ~ 1-2: Evidence for Cold Flow Accretion Powered Star Formation in the Early Universe

DOI: 10.1088/0004-637X/799/1/13 Bibcode: 2015ApJ...799...13B

Spoon, Henrik; Verma, Aprajita; Nikola, Thomas +5 more

We have recently detected the [C II] 157.7 µm line in eight star-forming galaxies at redshifts 1 to 2 using the redshift (z) Early Universe Spectrometer (ZEUS). Our sample targets star formation dominant sources detected in PAH emission. This represents a significant addition to [C II] observations during the epoch of peak star formation. We…

2015 • The Astrophysical Journal

Herschel 64