Search Publications
Detections of Massive Stars in the Cluster MCM2005b77, in the Star-forming Regions GRS G331.34-00.36 (S62) and GRS G337.92-00.48 (S36)
Menten, Karl M.; Rich, R. Michael; Figer, Donald F. +2 more
Large infrared and millimeter wavelength surveys of the Galactic plane have unveiled more than 600 new bubble H II regions and more than 3000 candidate star clusters. We present a study of the candidate clusters MCM2005b72, DBS2003-157, DBS2003-172, and MCM2005b77 based on near-infrared spectroscopy taken with SofI on the NTT and infrared photomet…
The LABOCA/ACT Survey of Clusters at All Redshifts: Multiwavelength Analysis of Background Submillimeter Galaxies
Hilton, Matt; Bond, J. Richard; Dünner, Rolando +12 more
We present a multiwavelength analysis of 48 submillimeter galaxies (SMGs) detected in the Large APEX Bolometer Camera/Atacama Cosmology Telescope (ACT) Survey of Clusters at All Redshifts, LASCAR, which acquired new 870 µm and Australia Telescope Compact Array 2.1 GHz observations of 10 galaxy clusters detected through their Sunyaev-Zel’dovi…
Chromospheric Response during the Precursor and the Main Phase of a B6.4 Flare on 2005 August 20
Awasthi, Arun Kumar; Liu, Rui; Berlicki, Arkadiusz +2 more
Solar flare precursors depict a constrained rate of energy release, in contrast to the imminent rapid energy release, which calls for a different regime of plasma processes to be at play. Due to the subtle emission during the precursor phase, its diagnostics remain delusive, revealing either nonthermal electrons (NTEs) or thermal conduction to be …
ALMA Observation of NGC 5135: The Circumnuclear CO (6-5) and Dust Continuum Emission at 45 pc Resolution
Inami, Hanae; van der Werf, Paul; Gao, Yu +10 more
We present high-resolution (0.″17 × 0.″14) Atacama Large Millimeter/submillimeter Array (ALMA) observations of the CO (6-5) line and 435 µm dust continuum emission within a ∼9″ × 9″ area centered on the nucleus of the galaxy NGC 5135. NGC 5135 is a well-studied luminous infrared galaxy that also harbors a Compton-thick active galactic nucleu…
Particles Co-orbital to Janus and to Epimetheus: A Firefly Planetary Ring
Sfair, Rafael; Winter, Othon C.; Souza, Alexandre P. S. +3 more
The Cassini spacecraft found a new and unique ring that shares the trajectory of Janus and Epimetheus, co-orbital satellites of Saturn. Performing image analysis, we found this to be a continuous ring. Its width is between 30% and 50% larger than previously announced. We also verified that the ring behaves like a firefly. It can only be seen from …
Evolution of the Outflows in NGC 3516
Kraemer, S. B.; Dunn, Jay P.; Parvaresh, Rozhin +1 more
We analyze the 2011 HST/COS spectrum of the Seyfert 1 galaxy NGC 3516, which demonstrates clear changes in one of the intrinsic absorption troughs (component 5), slight evidence of change in a second trough (component 6), and the appearance of a new absorption trough (component 9). We interpret both the changes and the appearance of the new trough…
Dust Production Rates in the Fomalhaut Debris Disk from SOFIA/FORCAST Mid-infrared Imaging
Lau, R. M.; Herter, T. L.; Adams, J. D. +2 more
We present the first spatially resolved mid-infrared (37.1 µm) image of the Fomalhaut debris disk. We use point spread function fitting and subtraction to distinctly measure the flux from the unresolved component and the debris disk. We measure an infrared excess in the point source of 0.9 ± 0.2 Jy, consistent with emission from warm dust in…
Ultraviolet Flux Decrease Under a Grand Minimum from IUE Short-wavelength Observation of Solar Analogs
Melis, Carl; Tytler, David; Lubin, Dan
We have identified a sample of 33 Sun-like stars observed by the International Ultraviolet Explorer (IUE) with the short-wavelength spectrographs that have ground-based detections of chromospheric Ca II H+K activity. Our objective is to determine if these observations can provide an estimate of the decrease in ultraviolet (UV) surface flux associa…
Spatially Extended Low-ionization Emission Regions (LIERs) at z ∼ 0.9
Marchesini, Danilo; Momcheva, Ivelina G.; Brammer, Gabriel B. +9 more
We present spatially resolved emission diagnostics for eight z ∼ 0.9 galaxies that demonstrate extended low-ionization emission line regions over kpc scales. Eight candidates are selected based on their spatial extent and emission line fluxes from slitless spectroscopic observations with the Hubble Space Telescope/Wide Field Camera 3 G141 and G800…
J0453-6655, the Supernova Remnant in N4D
Points, S. D.; Murray, S. S.; Smith, R. K. +4 more
The Large Magellanic Cloud supernova remnant J0453-6655 in the H II region N4 has been observed with XMM-Newton and with Chandra. Almost all of the diffuse X-ray emission is from within a 3.‧5 × 2.‧3 region of bright optical filaments, and X-ray results from XMM-Newton and Chandra are very similar. Spectra indicate that the plasma is close to equi…