Search Publications
Spitzer’s View of the Candidate Cluster and Protocluster Catalog (CCPC)
Franck, J. R.; McGaugh, S. S.
The Candidate Cluster and Protocluster Catalog contains 218 galaxy overdensities composed of more than 2000 galaxies with spectroscopic redshifts spanning the first few Gyr after the Big Bang (2.0 ≤ z < 6.6). We use Spitzer archival data to track the underlying stellar mass of these overdense regions in various temporal cross sections by buildi…
The Hawaii SCUBA-2 Lensing Cluster Survey: Are Low-luminosity Submillimeter Galaxies Detected in the Rest-frame UV?
Wang, Wei-Hao; Cowie, Lennox L.; Barger, Amy J. +1 more
In this third paper of the Hawaii SCUBA-2 Lensing Cluster Survey series, we present Submillimeter Array (SMA) detections of six intrinsically faint 850 µm sources detected in SCUBA-2 images of the lensing cluster fields, A1689, A2390, A370, MACS J0717.5+3745, and MACS J1423.8+2404. Two of the SCUBA-2 sources split into doublets, yielding a t…
The Martian dust devil electron avalanche: Laboratory measurements of the E-field fortifying effects of dust-electron absorption
Farrell, W. M.; Collier, M. R.; McLain, J. L. +1 more
Analogous to terrestrial dust devils, charged dust in Mars dust devils should become vertically stratified in the convective features, creating large scale E-fields. This E-field in a Martian-like atmosphere has been shown to stimulate the development of a Townsend discharge (electron avalanche) that acts to dissipate charge in regions where charg…
Radio observation of Venus at meter wavelengths using the GMRT
Bhardwaj, Anil; Mohan, Nithin; Roy, Subhashis +4 more
The Venusian surface has been studied by measuring radar reflections and thermal radio emission over a wide spectral region of several centimeters to meter wavelengths from the Earth-based as well as orbiter platforms. The radiometric observations, in the decimeter (dcm) wavelength regime showed a decreasing trend in the observed brightness temper…
The BRAVE Program. I. Improved Bulge Stellar Velocity Dispersion Estimates for a Sample of Active Galaxies
Bershady, Matthew A.; Onken, Christopher A.; Bentz, Misty C. +2 more
We present new bulge stellar velocity dispersion measurements for 10 active galaxies with secure MBH determinations from reverberation mapping. These new velocity dispersion measurements are based on spatially resolved kinematics from integral-field (IFU) spectroscopy. In all but one case, the field of view of the IFU extends beyond the…
A study of a coronal hole associated with a large filament eruption
Gutiérrez, Heidy; Taliashvili, Lela; Lazarian, Alexandre +1 more
We report the results of a detailed study of an equatorial coronal hole and a dimming region related to the eruptions of a nearby large filament and subsequent coronal mass ejections (CMEs). The dynamic eruptions of the filament and the associated CMEs are probably related to the magnetic reconnection involving the magnetic field lines at the fila…
Very Large Array Ammonia Observations of the HH 111/HH 121 Protostellar System: A Detection of a New Source with a Peculiar Chemistry
Pineda, Jaime E.; Qin, Sheng-Li; Indebetouw, Remy +4 more
We present the results of Very Large Array NH3 (J,K)=(1,1) and (2,2) observations of the HH 111/HH 121 protostellar system. HH 111, with a spectacular collimated optical jet, is one of the most well-known Herbig-Haro objects. We report the detection of a new source, NH3-S, in the vicinity of HH 111/HH 121 (∼0.03 pc from the H…
Embedded Filaments in IRAS 05463+2652: Early Stage of Fragmentation and Star Formation Activities
Dewangan, L. K.; Ojha, D. K.; Baug, T. +1 more
We present a multiwavelength data analysis of IRAS 05463+2652 (hereafter I05463+2652) to study star formation mechanisms. A shell-like structure around I05463+2652 is evident in the Herschel column density map, which is not associated with any ionized emission. Based on the Herschel submillimeter images, several parsec-scale filaments (including t…
The Early Mars Climate System
Haberle, Robert M.; Catling, David C.; Carr, Michael H. +1 more
Polarization Radiation with Turbulent Magnetic Fields from X-Ray Binaries
Lu, Ju-Fu; Xiang, Fu-Yuan; Zhang, Jian-Fu
We study the properties of polarized radiation in turbulent magnetic fields from X-ray binary jets. These turbulent magnetic fields are composed of large- and small-scale configurations, which result in the polarized jitter radiation when the characteristic length of turbulence is less than the non-relativistic Larmor radius. On the contrary, the …