Search Publications
The Sizes of Massive Quiescent and Star-forming Galaxies at z ∼ 4 with ZFOURGE and CANDELS
Papovich, Casey; Kacprzak, Glenn G.; Glazebrook, Karl +17 more
We study the rest-frame ultraviolet (UV) sizes of massive (∼ 0.8× {10}11{M}⊙ ) galaxies at 3.4≤slant z\lt 4.2, selected from the FourStar Galaxy Evolution Survey, by fitting single Sérsic profiles to Hubble Space Telescope/WFC3/F160W images from the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey. Massive quies…
Detection of argon in the coma of comet 67P/Churyumov-Gerasimenko
Wurz, P.; Bochsler, P.; Altwegg, K. +28 more
Where do the 3.5 keV photons come from? A morphological study of the Galactic Center and of Perseus
Profumo, Stefano; Jeltema, Tesla; Carlson, Eric
We test the origin of the 3.5 keV line photons by analyzing the morphology of the emission at that energy from the Galactic Center and from the Perseus cluster of galaxies. We employ a variety of different templates to model the continuum emission and analyze the resulting radial and azimuthal distribution of the residual emission. We then perform…
Large Solar Energetic Particle Events Associated with Filament Eruptions Outside of Active Regions
Gopalswamy, N.; Yashiro, S.; Mäkelä, P. +4 more
We report on four large filament eruptions (FEs) from solar cycles 23 and 24 that were associated with large solar energetic particle (SEP) events and interplanetary type II radio bursts. The post-eruption arcades corresponded mostly to C-class soft X-ray enhancements, but an M1.0 flare was associated with one event. However, the associated corona…
High-J CO Sleds in Nearby Infrared Bright Galaxies Observed By Herschel/PACS
Lutz, D.; Genzel, R.; Poglitsch, A. +16 more
We report the detection of far-infrared (FIR) CO rotational emission from nearby active galactic nuclei (AGNs) and starburst galaxies, as well as several merging systems and Ultra-Luminous Infrared Galaxies (ULIRGs). Using the Herschel Photodetector Array Camera and Spectrometer (PACS), we have detected transitions in the Jupp = 14-30 r…
APEX-CHAMP+ high-J CO observations of low-mass young stellar objects. IV. Mechanical and radiative feedback
Nagy, Z.; van der Marel, N.; van Dishoeck, E. F. +14 more
Context. During the embedded stage of star formation, bipolar molecular outflows and UV radiation from the protostar are important feedback processes. Both processes reflect the accretion onto the forming star and affect subsequent collapse or fragmentation of the cloud.
Aims: Our aim is to quantify the feedback, mechanical and radiative, for…
A possible explanation of low energy γ-ray excess from galactic centre and Fermi bubble by a Dark Matter model with two real scalars
Prasad Modak, Kamakshya; Majumdar, Debasish; Rakshit, Subhendu
We promote the idea of multi-component Dark Matter (DM) to explain results from both direct and indirect detection experiments. In these models as contribution of each DM candidate to relic abundance is summed up to meet WMAP/Planck measurements of ΩDM, these candidates have larger annihilation cross-sections compared to the single-comp…
A Semi-analytical Line Transfer Model to Interpret the Spectra of Galaxy Outflows
Panagia, N.; Scarlata, C.
We present a semi-analytical line transfer model, (SALT), to study the absorption and re-emission line profiles from expanding galactic envelopes. The envelopes are described as a superposition of shells with density and velocity varying with the distance from the center. We adopt the Sobolev approximation to describe the interaction between the p…
Revisiting cosmological bounds on sterile neutrinos
Mena, Olga; Vincent, Aaron C.; Lattanzi, Massimiliano +2 more
We employ state-of-the art cosmological observables including supernova surveys and BAO information to provide constraints on the mass and mixing angle of a non-resonantly produced sterile neutrino species, showing that cosmology can effectively rule out sterile neutrinos which decay between BBN and the present day. The decoupling of an additional…
ALMA Resolves the Spiraling Accretion Flow in the Luminous OB Cluster-forming Region G33.92+0.11
Zhang, Qizhou; Liu, Hauyu Baobab; Galván-Madrid, Roberto +4 more
How rapidly collapsing parsec-scale massive molecular clumps feed high-mass stars and how they fragment to form OB clusters have been outstanding questions in the field of star formation. In this work, we report the resolved structures and kinematics of the approximately face-on, rotating massive molecular clump, G33.92+0.11. Our high-resolution A…