Search Publications
A Challenging View of the 2015 Summer V404 Cyg Outburst at High Energy with INTEGRAL/SPI: The Finale
Jourdain, Elisabeth; Roques, Jean-Pierre; Rodi, James
During its strong outburst of 2015 June/July, the X-ray transient V404 Cygni (=GS2023+338) was observed up to a level of 50 Crab in the hard X-ray domain. We focus here on a particularly intense episode preceeding a definitive decline of the source activity. We benefit from large signal-to-noise ratios to investigate the source spectral variabilit…
A Controlled Study of Cold Dust Content in Galaxies from z = 0-2
Kartaltepe, Jeyhan S.; Kirkpatrick, Allison; Kocevski, Dale D. +12 more
At z=1{--}3, the formation of new stars is dominated by dusty galaxies whose far-IR emission indicates they contain colder dust than local galaxies of a similar luminosity. We explore the reasons for the evolving IR emission of similar galaxies over cosmic time using (1) local galaxies from GOALS ({L}{IR}={10}11{--}{10}1…
Small Coronal Holes Near Active Regions as Sources of Slow Solar Wind
Wang, Y. -M.
We discuss the nature of the small areas of rapidly diverging, open magnetic flux that form in the strong unipolar fields at the peripheries of active regions (ARs), according to coronal extrapolations of photospheric field measurements. Because such regions usually have dark counterparts in extreme-ultraviolet (EUV) images, we refer to them as co…
Void Profile from Planck Lensing Potential Map
Sawangwit, Utane; Chantavat, Teeraparb; Wandelt, Benjamin D.
We use the lensing potential map from Planck CMB lensing reconstruction analysis and the “Public Cosmic Void Catalog” to measure the stacked void lensing potential. We have made an attempt to fit the HSW void profile parameters from the stacked lensing potential. In this profile, four parameters are needed to describe the shape of voids with diffe…
Determining the Halo Mass Scale Where Galaxies Lose Their Gas
Moustakas, John; Aragón-Salamanca, Alfonso; Milvang-Jensen, Bo +9 more
A major question in galaxy formation is how the gas supply that fuels activity in galaxies is modulated by their environment. We use spectroscopy of a set of well-characterized clusters and groups at 0.4 < z < 0.8 from the ESO Distant Cluster Survey and compare it to identically selected field galaxies. Our spectroscopy allows us to isolate …
Blind Millimeter Line Emitter Search using ALMA Data Toward Gravitational Lensing Clusters
Tamura, Yoichi; Kohno, Kotaro; Oguri, Masamune +10 more
We present the results of a blind millimeter line emitter search using ALMA Band 6 data with a single-frequency tuning toward four gravitational lensing clusters (RXJ1347.5-1145, Abell S0592, MACS J0416.1-2403, and Abell 2744). We construct 3D signal-to-noise ratio (S/N) cubes with 60 and 100 MHz binning, and search for millimeter line emitters. W…
Gas Content and Kinematics in Clumpy, Turbulent Star-forming Disks
Glazebrook, Karl; Bolatto, Alberto D.; Obreschkow, Danail +6 more
We present molecular gas-mass estimates for a sample of 13 local galaxies whose kinematic and star-forming properties closely resemble those observed in z ≈ 1.5 main-sequence galaxies. Plateau de Bure observations of the CO[1-0] emission line and Herschel Space Observatory observations of the dust emission both suggest molecular gas-mass fractions…
Extended Gamma-Ray Emission from the G25.0+0.0 Region: A Star-forming Region Powered by the Newly Found OB Association?
Funk, S.; Uchiyama, Y.; Katsuta, J.
We report a study of extended γ-ray emission with the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope, which is likely to be the second case of a γ-ray detection from a star-forming region (SFR) in our Galaxy. The LAT source is located in the G25 region, 1.°7 × 2.°1 around (l, b) = (25.°0, 0.°0). The γ-ray emission is found…
The Warm Circumgalactic Medium: 105-6 K Gas Associated with a Single Galaxy Halo or with an Entire Group of Galaxies?
Danforth, Charles W.; Stocke, John T.; Keeney, Brian A. +3 more
In preparation for a Hubble Space Telescope (HST) observing project using the Cosmic Origins Spectrograph (COS), the positions of all AGN targets having high-S/N far-UV G130M spectra were cross-correlated with a large catalog of low-redshift galaxy groups homogenously selected from the spectroscopic sample of the Sloan Digital Sky Survey (SDSS). S…
The Small-scale Structure of Photospheric Convection Retrieved by a Deconvolution Technique Applied to Hinode/SP Data
Solanki, S. K.; Shimizu, T.; Quintero Noda, C. +3 more
Solar granules are bright patterns surrounded by dark channels, called intergranular lanes, in the solar photosphere and are a manifestation of overshooting convection. Observational studies generally find stronger upflows in granules and weaker downflows in intergranular lanes. This trend is, however, inconsistent with the results of numerical si…