Search Publications
The MUSE Hubble Ultra Deep Field Survey. IV. Global properties of C III] emitters
Feltre, Anna; Bacon, Roland; Inami, Hanae +12 more
The C III] λλ1907, 1909 emission doublet has been proposed as an alternative to Lyman-α in redshift confirmations of galaxies at z ≳ 6 since it is not attenuated by the largely neutral intergalactic medium at these redshifts and is believed to be strong in the young, vigorously star-forming galaxies present at these early cosmic times. We present …
Chemistry and Kinematics of the Late-forming Dwarf Irregular Galaxies Leo A, Aquarius, and Sagittarius DIG
Skillman, Evan D.; Cole, Andrew A.; Held, Enrico V. +5 more
We present Keck/DEIMOS spectroscopy of individual stars in the relatively isolated Local Group dwarf galaxies Leo A, Aquarius, and the Sagittarius dwarf irregular galaxy. The three galaxies—but especially Leo A and Aquarius—share in common delayed star formation histories (SFHs) relative to many other isolated dwarf galaxies. The stars in all thre…
The ALMA Redshift 4 Survey (AR4S). I. The massive end of the z = 4 main sequence of galaxies
Elbaz, D.; Leiton, R.; Okumura, K. +4 more
We introduce the ALMA Redshift 4 Survey (AR4S), a systematic ALMA survey of all the known galaxies with stellar mass (M∗) larger than 5 × 1010M⊙ at 3.5 <z< 4.7 in the GOODS-south, UDS and COSMOS CANDELS fields. The sample we have analyzed in this paper is composed of 96 galaxies observed with ALMA at 890 &mic…
On the Connection between Turbulent Motions and Particle Acceleration in Galaxy Clusters
Paltani, S.; Gastaldello, F.; Tramacere, A. +5 more
Giant radio halos are megaparsec-scale diffuse radio sources associated with the central regions of galaxy clusters. The most promising scenario to explain the origin of these sources is that of turbulent re-acceleration, in which MeV electrons injected throughout the formation history of galaxy clusters are accelerated to higher energies by turbu…
Herschel far-infrared photometry of the Swift Burst Alert Telescope active galactic nuclei sample of the local universe - III. Global star-forming properties and the lack of a connection to nuclear activity
Mushotzky, Richard F.; Cowie, Lennox L.; Barger, Amy J. +3 more
We combine the Herschel Space Observatory PACS (Photoconductor Array Camera and Spectrometer) and SPIRE (Spectral and Photometric Imaging Receiver) photometry with archival WISE (Wide-field Infrared Survey Explorer) photometry to construct the spectral energy distributions (SEDs) for over 300 local (z < 0.05), ultrahard X-ray (14-195 keV) selec…
Martian cratering 11. Utilizing decameter scale crater populations to study Martian history
Daubar, I. J.; Hartmann, W. K.
New information has been obtained in recent years regarding formation rates and the production size-frequency distribution (PSFD) of decameter-scale primary Martian craters formed during recent orbiter missions. Here we compare the PSFD of the currently forming small primaries (P) with new data on the PSFD of the total small crater population that…
Radiative Diagnostics in the Solar Photosphere and Chromosphere
van Noort, M.; de la Cruz Rodríguez, J.
Magnetic fields on the surface of the Sun and stars in general imprint or modify the polarization state of the electromagnetic radiation that is leaving from the star. The inference of solar/stellar magnetic fields is performed by detecting, studying and modeling polarized light from the target star. In this review we present an overview of techni…
Cold and warm electrons at comet 67P/Churyumov-Gerasimenko
Wahlund, J. -E.; Nilsson, H.; André, M. +20 more
Context. Strong electron cooling on the neutral gas in cometary comae has been predicted for a long time, but actual measurements of low electron temperature are scarce.
Aims: Our aim is to demonstrate the existence of cold electrons in the inner coma of comet 67P/Churyumov-Gerasimenko and show filamentation of this plasma.
Methods: In s…
The Sizes and Depletions of the Dust and Gas Cavities in the Transitional Disk J160421.7-213028
Dong, Ruobing; Ohashi, Nagayoshi; Tamura, Motohide +18 more
We report ALMA Cycle 2 observations of 230 GHz (1.3 mm) dust continuum emission, and 12CO, 13CO, and C18O J = 2-1 line emission, from the Upper Scorpius transitional disk [PZ99] J160421.7-213028, with an angular resolution of ∼0\buildrel{\prime\prime}\over{.} 25 (35 au). Armed with these data and existing H-band sc…
Kinematics and Optical Depth in the Green Peas: Suppressed Superwinds in Candidate LyC Emitters
Scarlata, Claudia; Jaskot, Anne E.; Dowd, Tara +1 more
By clearing neutral gas away from a young starburst, superwinds may regulate the escape of Lyman continuum (LyC) photons from star-forming galaxies. However, models predict that superwinds may not launch in the most extreme, compact starbursts. We explore the role of outflows in generating low optical depths in the Green Peas (GPs), the only known…