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The External Heating of Dust in a Homogeneous Spherical Shell
Eli Dwek, Richard G. Arendt
We present a procedure for calculating the heating of, and the infrared emission from, dust in a homogeneous spherical shell surrounded by a spherically symmetric source of radiati…
The Population of the Galactic Center Filaments: Position Angle Distribution Reveal a Degree-scale Collimated Outflow from Sgr A* along the Galactic Plane
F. Yusef-Zadeh, R. G. Arendt, M. Wardle +1
We have examined the distribution of the position angle (PA) of the Galactic center filaments with lengths and as well as their length distribution as a functi…
Mid-infrared imaging of Supernova 1987A
Mikako Matsuura, Roger Wesson, Richard G. Arendt +9
At a distance of 50 kpc, Supernova 1987A is an ideal target to study how a young supernova (SN) evolves in time. Its equatorial ring, filled with material expelled from the progeni…
Populations of Magnetized Filaments in the Intracluster Medium and the Galactic Center
F. Yusef-Zadeh, R. G. Arendt, M. Wardle
Magnetized radio filaments are found in abundance in the inner few hundred pc of our Galaxy. Progress in understanding this population of filaments has been slow, in part due to a…
The population of Galactic centre filaments III: candidate radio and stellar sources
F. Yusef-Zadeh, R. G. Arendt, M. Wardle +2
Recent MeerKAT radio continuum observations of the Galactic center at 20 cm show a large population of nonthermal radio filaments (NRFs) in the inner few hundred pc of the Galaxy.…
Statistical Properties of the Population of the Galactic Center Filaments: The Spectral Index and Equipartition Magnetic Field
F. Yusef-Zadeh, R. G. Arendt, M. Wardle +3
We present high-pass filtered continuum images of the inner of the Galactic center at 20 cm with resolution. These mosaic images are taken with M…
Dust masses, compositions, and luminosities in the nuclear disks and the diffuse circumnuclear medium of Arp220
Eli Dwek, Richard G. Arendt
We present an analysis of the 4-2600 m spectral energy distributions (SEDs) of the west and east nuclei and the diffuse infrared (IR) region of the merger-driven starburst Arp 2…
2 mm GISMO Observations of the Galactic Center. II. A Nonthermal Filament in the Radio Arc and Compact Sources
Johannes Staguhn, Richard G. Arendt, Eli Dwek +5
We have used the Goddard IRAM 2-Millimeter Observer (GISMO) with the 30 m IRAM telescope to carry out a 2 mm survey of the Galaxy's central molecular zone (CMZ). These observations…
2 mm GISMO Observations of the Galactic Center. I. Dust Emission
Richard G. Arendt, Johannes Staguhn, Eli Dwek +5
The Central Molecular Zone (CMZ), covering the inner ~1 of the Galactic plane has been mapped at 2 mm using the GISMO bolometric camera on the 30 m IRAM telescope. The $21'…
Spectral Properties Of Populations Behind The Coherence In Spitzer Near-Infrared And Chandra X-Ray Backgrounds
Yanxia Li, Nico Cappelluti, Günther Hasinger +3
We study the coherence of the near-infrared and X-ray background fluctuations and the X-ray spectral properties of the sources producing it. We use data from multiple Spitzer and C…
The SPLASH and Chandra COSMOS Legacy Survey: the Cross Power Between Near-Infrared and X-Ray Background Fluctuations
Yanxia Li, Nico Cappelluti, Richard G. Arendt +3
We study the source-subtracted near-infrared and X-ray background fluctuations of the COSMOS field using data from the Spitzer SPLASH program (1272 hours) and Chandra COSMOS…
On the Spatially Resolved Star Formation History in M51 I: Hybrid UV+IR Star Formation Laws and IR Emission from Dust Heated by Old Stars
R. T. Eufrasio, B. D. Lehmer, A. Zezas +10
We present Lightning, a new spectral energy distribution (SED) fitting procedure, capable of quickly and reliably recovering star formation history (SFH) and extinction parameters.…
A Massive Shell of Supernova-formed Dust in SNR G54.1+0.3
Tea Temim, Eli Dwek, Richard G. Arendt +5
While theoretical dust condensation models predict that most refractory elements produced in core-collapse supernovae (SNe) efficiently condense into dust, a large quantity of dust…
Metallicity and Age of the Stellar Stream Around the Disk Galaxy NGC 5907
Seppo Laine, Carl J. Grillmair, Peter Capak +9
Stellar streams have become central to studies of the interaction histories of nearby galaxies. To characterize the most prominent parts of the stellar stream around the well-known…
Sgr A* and its Environment: Low Mass Star Formation, the Origin of X-ray Gas and Collimated Outflow
F. Yusef-Zadeh, M. Wardle, R. Schödel +5
We present high-resolution multiwavelength radio continuum images of the region within 150 of Sgr A*, revealing a number of new extended features and stellar sources in this reg…
Submillimeter Observations of CLASH 2882 and the Evolution of Dust in this Galaxy
Eli Dwek, Johannes Staguhn, Richard G. Arendt +7
Two millimeter observations of the MACS J1149.6+2223 cluster have detected a source that was consistent with the location of the lensed MACS1149-JD galaxy at z=9.6. A positive iden…
Signatures of Young Star Formation Activity Within Two Parsecs of Sgr A*
F. Yusef-Zadeh, M. Wardle, M. Sewilo +9
We present radio and infrared observations indicating on-going star formation activity inside the pc circumnuclear ring at the Galactic center. Collectively these measure…
Star Formation Histories Across the Interacting Galaxy NGC 6872, the Largest-Known Spiral
Rafael T. Eufrasio, Eli Dwek, Richard G. Arendt +5
NGC 6872, hereafter the Condor, is a large spiral galaxy that is interacting with its closest companion, the S0 galaxy IC 4970. The extent of the Condor provides an opportunity for…
Dust formation, evolution, and obscuration effects in the very high-redshift universe
Eli Dwek, Johannes Staguhn, Richard G. Arendt +3
The evolution of dust at redshifts z>9, and consequently the dust properties, differs greatly from that in the local universe. In contrast to the local universe, core collapse supe…
Interstellar and Ejecta Dust in the Cas A Supernova Remnant
Richard G. Arendt, Eli Dwek, Gladys Kober +2
Infrared continuum observations provide a means of investigating the physical composition of the dust in the ejecta and swept up medium of the Cas A supernova remnant. Using low re…
ALMA Observations of the Galactic Center: SiO Outflows and High Mass Star Formation near Sgr A*
F. Yusef-Zadeh, M. Royster, M. Wardle +7
ALMA observations of the Galactic center with spatial resolution resulted in the detection of 11 SiO (5-4) clumps of molecular gas within 0.6pc (15) of Sgr A*…
Properties and Spatial Distribution of Dust Emission in the Crab Nebula
Tea Temim, George Sonneborn, Eli Dwek +4
Recent infrared (IR) observations of freshly-formed dust in supernova remnants (SNRs) have yielded significantly lower dust masses than predicted by theoretical models and measured…
Massive Young Stellar Objects in the Galactic Center. I. Spectroscopic Identification from Spitzer/IRS Observations
Deokkeun An, Solange V. Ramírez, Kris Sellgren +7
We present results from our spectroscopic study, using the Infrared Spectrograph (IRS) onboard the Spitzer Space Telescope, designed to identify massive young stellar objects (YSOs…
The Radio - 2 mm Spectral Index of the Crab Nebula Measured with GISMO
R. G. Arendt, J. V. George, J. G. Staguhn +17
We present results of 2 mm observations of the Crab Nebula, obtained using the Goddard-IRAM Superconducting 2 Millimeter Observer (GISMO) bolometer camera on the IRAM 30 m telescop…