Search Publications
Resolving the Discrepancy of Distance to M60, a Giant Elliptical Galaxy in Virgo
Lee, Myung Gyoon; Jang, In Sung
There is a well-known discrepancy in the distance estimation of M60, a giant elliptical galaxy in Virgo; the planetary nebula luminosity function (PNLF) distance moduli for this galaxy are, on average, 0.4 mag smaller than the values based on the surface brightness fluctuation (SBF) in the literature. We present photometry of the resolved stars in…
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 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…
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…
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 …
Photoionization Modeling of Titan’s Dayside Ionosphere
Wahlund, J. -E.; Edberg, N. J. T.; Vigren, E. +4 more
Previous modeling studies of Titan’s dayside ionosphere predict electron number densities that are roughly a factor of 2 higher than those observed by the RPWS/Langmuir probe. The issue can equivalently be described as the ratio between the calculated electron production rates and the square of the observed electron number densities resulting in r…
Three-minute Sunspot Oscillations Driven by Magnetic Reconnection in a Light Bridge
Moon, Yong-Jae; Yurchyshyn, Vasyl; Chae, Jongchul +5 more
We report a different type of three-minute chromospheric oscillation above a sunspot in association with a small-scale impulsive event in a light bridge (LB). During our observations, we found a transient brightening in the LB. The brightening was composed of elementary bursts that may be a manifestation of fast repetitive magnetic reconnections i…
A Librational Model for the Propeller Blériot in the Saturnian Ring System
Seiß, M.; Spahn, F.; Hoffmann, H. +2 more
The reconstruction of the orbital evolution of the propeller structure Blériot orbiting in Saturn’s A ring from recurrent observations in Cassini ISS images yielded a considerable offset motion from the expected Keplerian orbit. This offset motion can be composed by three sinusoidal harmonics with amplitudes and periods of 1845, 152, 58 km and 11.…