Search Publications
The Connection between Different Tracers of the Diffuse Interstellar Medium: Kinematics
Lambert, D. L.; Federman, S. R.; Goldsmith, Paul F. +4 more
Using visible, radio, microwave, and submillimeter data, we study several lines of sight toward stars generally closer than 1 kpc on a component-by-component basis. We derive the component structure seen in absorption at visible wavelengths from Ca II, Ca I, K I, CH, CH+, and CN and compare it to emission from H I, CO and its isotopolog…
Revealing Dusty Supernovae in High-redshift (Ultra)Luminous Infrared Galaxies through Near-infrared Integrated Light Variability
Yan, Haojing; Ma, Zhiyuan; Beacom, John F. +1 more
Luminous and ultra-luminous infrared galaxies ((U)LIRGs) are rare today but are increasingly abundant at high redshifts. They are believed to be dusty starbursts, and hence should have high rates of supernovae (multiple events per year). Due to their extremely dusty environment, however, such supernovae could only be detected in rest-frame infrare…
Solar Radio Burst Associated with the Falling Bright EUV Blob
Dudík, Jaroslav; Zemanová, Alena; Karlický, Marian +1 more
At the beginning of the 2015 November 4 flare, in the 1300-2000 MHz frequency range, we observed a very rare slow positively drifting burst. We searched for associated phenomena in simultaneous EUV observations made by IRIS, SDO/AIA, and Hinode/XRT, as well as in H α observations. We found that this radio burst was accompanied with the…
Laboratory Analog of Heavy Jets Impacting a Denser Medium in Herbig-Haro (HH) Objects
Wang, C.; Zhang, J.; Zhao, G. +17 more
X-ray emissions in protostars play an important role in the chemistry of protostellar disks and in constraining the physics of jet formation. We have experimentally investigated the mechanism of X-ray emission in protostellar jets and modeled their interaction with the surrounding medium. The simulated supersonic jet is generated by intense laser …
Chandra and HST Snapshots of Fossil System Progenitors
White, Raymond E., III; Dupke, Renato A.; Wong, Ka-Wah +2 more
The search for the progenitors to today’s fossil galaxy systems has been restricted to N-body simulations until recently, when 12 fossil progenitors were identified in the CASSOWARY catalog of strong-lensing systems. All 12 systems lie in the predicted redshift range for finding fossils that are in the process of assembling their brightest group g…
Rapid Flaring in the Galactic-plane Gamma-Ray Transient Fermi J0035+6131
Kaaret, Philip; Pandel, Dirk
We investigate the gamma-ray and X-ray emission from the transient gamma-ray source Fermi J0035+6131, which was discovered with the Fermi Large Area Telescope (LAT) near the Galactic plane at b = 1.°3, and we discuss potential multi-wavelength counterparts of the gamma-ray source. Our analysis of over 9 years of Fermi LAT data revealed two flaring…
The Physical Characteristics of Interstellar Medium in NGC 3665 with Herschel Observations
Gu, Qiu-Sheng; Shi, Yong; Zhao, Yinghe +1 more
We present the analysis of the physical properties of the interstellar medium in the nearby early-type galaxy NGC 3665, based on the far-infrared photometric and spectroscopic data as observed by the Herschel Space Observatory. The fit to the spectral energy distribution reveals a high dust content in the galaxy, with a dust-to-stellar mass ratio …
Proper Motion of the Faint Star near KIC 8462852 (Boyajian's Star)—Not a Binary System
Wright, J. T.; Montgomery, J.; Clemens, Dan P. +4 more
A faint star located 2 arcsec from KIC 8462852 was discovered in Keck 10 m adaptive optics imaging in the JHK near-infrared (NIR) in 2014 by Boyajian et al. (2016). The closeness of the star to KIC 8462852 suggested that the two could constitute a binary, which might have implications for the cause of the brightness dips seen by Kepler and in grou…
Proper Motions of Sunspots’ Umbral Dots at High Temporal and Spatial Resolution
Koutchmy, Serge; Goodarzi, Hadis; Adjabshirizadeh, Ali
To deepen the analysis of the photometric properties of the umbra of a sunspot, we study proper motions of small features such as umbral dots (UDs) inside a single sunspot observed by the Solar Optical Telescope of Hinode close to the disk center. We consider horizontal flows with high precision and details to study the transient motion behavior o…
Three-dimensional Oscillations of 21 Halo Coronal Mass Ejections Using Multi-spacecraft Data
Moon, Y. -J.; Lee, Harim; Nakariakov, V. M. +3 more
We investigate the 3D structure of kinematic oscillations of full halo coronal mass ejections (FHCMEs) using multi-spacecraft coronagraph data from two non-parallel lines of sight. For this, we consider 21 FHCMEs which are simultaneously observed by the Solar and Heliospheric Observatory and the Solar TErrestrial RElations Observatory A or B, from…