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[C II] and 12CO(1-0) Emission Maps in HLSJ091828.6+514223: A Strongly Lensed Interacting System at z = 5.24
Smail, I.; Kneib, J. -P.; Altieri, B. +25 more
We present Submillimeter Array [C II] 158 µm and Karl G. Jansky Very Large Array 12CO(1-0) line emission maps for the bright, lensed, submillimeter source at z = 5.2430 behind A 773: HLSJ091828.6+514223 (HLS0918). We combine these measurements with previously reported line profiles, including multiple 12CO rotational tr…
An unbiased study of debris discs around A-type stars with Herschel
Duchêne, G.; Wyatt, M. C.; Phillips, N. +8 more
The Herschel DEBRIS (Disc Emission via a Bias-free Reconnaissance in the Infrared/Submillimetre) survey brings us a unique perspective on the study of debris discs around main-sequence A-type stars. Bias-free by design, the survey offers a remarkable data set with which to investigate the cold disc properties. The statistical analysis of the 100 a…
The SPoCA-suite: Software for extraction, characterization, and tracking of active regions and coronal holes on EUV images
Verbeeck, C.; Delouille, V.; Mampaey, B. +1 more
Context. Precise localization and characterization of active regions (AR) and coronal holes (CH) as observed by extreme ultra violet (EUV) imagers are crucial for a wide range of solar and helio-physics studies.
Aims: We introduce a set of segmentation procedures (known as the SPoCA-suite) that allows one to retrieve AR and CH properties on E…
The L-σ relation for massive bursts of star formation
Terlevich, E.; Terlevich, R.; Bresolin, F. +4 more
The validity of the emission-line luminosity versus ionized gas velocity dispersion (L-σ) correlation for H II galaxies (HIIGx) and its potential as an accurate distance estimator are assessed. For a sample of 128 local (0.02 ≲ z ≲ 0.2) compact HIIGx with high equivalent widths of their Balmer emission lines, we obtained the ionized gas velocity d…
How Dead are Dead Galaxies? Mid-infrared Fluxes of Quiescent Galaxies at Redshift 0.3 < z < 2.5: Implications for Star Formation Rates and Dust Heating
Franx, Marijn; Labbé, Ivo; Quadri, Ryan +17 more
We investigate star formation rates (SFRs) of quiescent galaxies at high redshift (0.3 < z < 2.5) using 3D-HST WFC3 grism spectroscopy and Spitzer mid-infrared data. We select quiescent galaxies on the basis of the widely used UVJ color-color criteria. Spectral energy distribution (SED) fitting (rest-frame optical and near-IR) indicates very…
Imaging and Spectroscopic Observations of a Filament Channel and the Implications for the Nature of Counter-streamings
Chen, P. F.; Harra, L. K.; Fang, C.
The dynamics of a filament channel are observed with imaging and spectroscopic telescopes before and during the filament eruption on 2011 January 29. The extreme ultraviolet (EUV) spectral observations reveal that there are no EUV counterparts of the Hα counter-streamings in the filament channel, implying that the ubiquitous Hα counter-streamings …
Constraints on modified Newtonian dynamics theories from radio tracking data of the Cassini spacecraft
Jacobson, R. A.; Folkner, W. M.; Hees, A. +1 more
The modified Newtonian dynamics (MOND) is an attempt to modify the gravitation theory to solve the dark matter problem. This phenomenology is very successful at the galactic level. The main effect produced by MOND in the Solar System is called the external field effect parametrized by the parameter Q2. We have used nine years of Cassini…
Intracluster Light at the Frontier: A2744
Trujillo, Ignacio; Montes, Mireia
The ultra-deep multiwavelength Hubble Space Telescope Frontier Fields coverage of the Abell Cluster 2744 is used to derive the stellar population properties of its intracluster light (ICL). The restframe colors of the ICL of this intermediate redshift (z = 0.3064) massive cluster are bluer (g - r = 0.68 ± 0.04; i - J = 0.56 ± 0.01) than those foun…
The Broadband Spectral Variability of MCG-6-30-15 Observed by NuSTAR and XMM-Newton
Harrison, F. A.; Cappi, M.; Guainazzi, M. +19 more
MCG-6-30-15, at a distance of 37 Mpc (z = 0.008), is the archetypical Seyfert 1 galaxy showing very broad Fe Kα emission. We present results from a joint NuSTAR and XMM-Newton observational campaign that, for the first time, allows a sensitive, time-resolved spectral analysis from 0.35 keV up to 80 keV. The strong variability of the source is best…
Confirmation of Circumstellar Phosphine
Teyssier, D.; Cernicharo, J.; Encrenaz, P. +2 more
Phosphine (PH3) was tentatively identified a few years ago in the carbon star envelopes IRC +10216 and CRL 2688 from observations of an emission line at 266.9 GHz attributable to the J = 1-0 rotational transition. We report the detection of the J = 2-1 rotational transition of PH3 in IRC +10216 using the HIFI instrument on bo…