Search Publications
The Slowest Spinning X-Ray Pulsar in an Extragalactic Globular Cluster
Sartore, Nicola; Bachetti, Matteo; Webb, Natalie A. +2 more
Neutron stars are thought to be born rapidly rotating and then exhibit a phase of rotation-powered pulsations as they slow down to 1-10 s periods. The significant population of millisecond pulsars observed in our Galaxy is explained by the recycling concept: during an epoch of accretion from a donor star in a binary system, the neutron star is spu…
Probing the Hot X-Ray Gas in the Narrow-line Region of Mrk 3
Andrade-Santos, Felipe; Kraft, Ralph P.; Forman, William R. +2 more
We study the prototypical Seyfert 2 galaxy, Markarian 3, based on imaging and high-resolution spectroscopy observations taken by Chandra. We construct a deconvolved X-ray image, which reveals the S-shaped morphology of the hot gas in the narrow-line region (NLR). While this morphology is similar to the radio and [O III] emission, the distribution …
Direct Measurement of Anisotropic and Asymmetric Wave Vector Spectrum in Ion-scale Solar Wind Turbulence
Escoubet, C. P.; Narita, Y.; Roberts, O. W.
This analysis represents the first time that a simultaneous measurement of parallel and perpendicular spectral indices at both inertial and kinetic scales has been made directly in wave vector space, using a single interval of solar wind plasma. An interferometric wave vector analysis method is applied to four-point magnetometer data from the Clus…
Searching for Fossil Evidence of AGN Feedback in WISE-selected Stripe-82 Galaxies by Measuring the Thermal Sunyaev-Zel’dovich Effect with the Atacama Cosmology Telescope
Cohen, Seth; Joshi, Bhavin; Scannapieco, Evan +2 more
We directly measure the thermal energy of the gas surrounding galaxies through the thermal Sunyaev-Zel’dovich (tSZ) effect. We perform a stacking analysis of microwave background images from the Atacama Cosmology Telescope, around 1179 massive quiescent elliptical galaxies at 0.5 ≤ z ≤ 1.0 (“low-z”) and 3274 galaxies at 1.0 ≤ z ≤ 1.5 (“high-z”), s…
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…