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A remarkably large depleted core in the Abell 2029 BCG IC 1101
Graham, Alister W.; Knapen, Johan H.; Dullo, Bililign T.
We report the discovery of an extremely large (Rb ∼2.77 arcsec ≈ 4.2 kpc) core in the brightest cluster galaxy, IC 1101, of the rich galaxy cluster Abell 2029. Luminous core-Sérsic galaxies contain depleted cores - with sizes (Rb) typically 20-500 pc - that are thought to be formed by coalescing black hole binaries. We fit a …
Aeronomy of the Venus Upper Atmosphere
Pätzold, M.; López-Valverde, M. A.; Drossart, P. +3 more
We present aeronomical observations collected using remote sensing instruments on board Venus Express, complemented with ground-based observations and numerical modeling. They are mostly based on VIRTIS and SPICAV measurements of airglow obtained in the nadir mode and at the limb above 90 km. They complement our understanding of the behavior of Ve…
VALES I: the molecular gas content in star-forming dusty H-ATLAS galaxies up to z = 0.35
Rodighiero, G.; Ivison, R. J.; Cooray, A. +24 more
We present an extragalactic survey using observations from the Atacama Large Millimeter/submillimeter Array (ALMA) to characterize galaxy populations up to z = 0.35: the Valparaíso ALMA Line Emission Survey (VALES). We use ALMA Band-3 CO(1-0) observations to study the molecular gas content in a sample of 67 dusty normal star-forming galaxies selec…
Decadal timescale variability of the Enceladus plumes inferred from Cassini images
Ingersoll, Andrew P.; Ewald, Shawn P.
The brightness of the Enceladus plumes varies with position in the satellite's eccentric orbit, with altitude above the surface, and with time from one year to the next. Hedman et al. (2013, hereinafter H13) were the first to report these variations. They used data from Cassini's Visible and Infrared Mapping Spectrometer (VIMS). Here we present br…
Star formation and AGN activity in a sample of local luminous infrared galaxies through multiwavelength characterization
Mattila, Seppo; Alberdi, Antxon; Väisänen, Petri +8 more
Nuclear starbursts and active galactic nucleus (AGN) activity are the main heating processes in luminous infrared galaxies (LIRGs) and their relationship is fundamental to understand galaxy evolution. In this paper, we study the star formation and AGN activity of a sample of 11 local LIRGs imaged with subarcsecond angular resolution at radio (8.4 …
Massive Star Cluster Formation and Destruction in Luminous Infrared Galaxies in GOALS
Kim, D. -C.; Surace, J. A.; Inami, H. +17 more
We present the results of a Hubble Space Telescope ACS/HRC FUV, ACS/WFC optical study into the cluster populations of a sample of 22 Luminous Infrared Galaxies in the Great Observatories All-Sky LIRG Survey. Through integrated broadband photometry, we have derived ages and masses for a total of 484 star clusters contained within these systems. Thi…
Radial and local time structure of the Saturnian ring current, revealed by Cassini
Krupp, N.; Dougherty, M. K.; Thomsen, M. F. +6 more
We analyze particle and magnetic field data obtained between July 2004 and December 2013 in the equatorial magnetosphere of Saturn, by the Cassini spacecraft. The radial and local time distribution of the total (thermal and suprathermal) particle pressure and total plasma beta (ratio of particle to magnetic pressure) over radial distances from 5 t…
X-Ray and Optical Study of the Gamma-ray Source 3FGL J0838.8-2829: Identification of a Candidate Millisecond Pulsar Binary and an Asynchronous Polar
Thorstensen, John R.; Bogdanov, Slavko; Halpern, Jules P.
We observed the field of the Fermi source 3FGL J0838.8-2829 in optical and X-rays, initially motivated by the cataclysmic variable (CV) 1RXS J083842.1-282723 that lies within its error circle. Several X-ray sources first classified as CVs have turned out to be γ-ray emitting millisecond pulsars (MSPs). We find that 1RXS J083842.1-282723 is in fact…
Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars
Gontcharov, George A.; Mosenkov, Aleksandr V.
We compare eight sources of reddening and extinction estimates for approximately 60 000 Gaia DR1 Tycho-Gaia Astrometric Solution (TGAS) main sequence stars younger than 3 Gyr with a relative error of the Gaia parallax less than 0.1. For the majority of the stars, the best 2D dust emission-based reddening maps show considerable differences between …
Massive 70 µm quiet clumps I: evidence of embedded low/intermediate-mass star formation activity
Peretto, N.; Schisano, E.; Billot, N. +5 more
Massive clumps, prior to the formation of any visible protostars, are the best candidates to search for the elusive massive starless cores. In this work, we investigate the dust and gas properties of massive clumps selected to be 70 µm quiet, therefore good starless candidates. Our sample of 18 clumps has masses 300 ≲ M ≲ 3000 M⊙,…