Search Publications
Herschel and Hubble Study of a Lensed Massive Dusty Starbursting Galaxy at z ∼ 3
Ivison, R. J.; Frayer, D. T.; Cooray, A. +19 more
We present the results of combined deep Keck/NIRC2, HST/WFC3 near-infrared, and Herschel far-infrared observations of an extremely star-forming dusty lensed galaxy identified from the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS J133542.9+300401). The galaxy is gravitationally lensed by a massive WISE-identified galaxy cluster at z …
Magnetic Separatrix as the Source Region of the Plasma Supply for an Active-region Filament
Cao, Wenda; Yang, K.; Chen, P. F. +2 more
Solar filaments can be formed via chromospheric evaporation followed by condensation in the corona or by the direct injection of cool plasma from the chromosphere to the corona. We here confirm with high-resolution Hα data observed by the 1.6 m New Solar Telescope of the Big Bear Solar Observatory on 2015 August 21 that an active-region filament i…
Sunspot Light Walls Suppressed by Nearby Brightenings
Hou, Yijun; Yang, Shuhong; Zhang, Jun +3 more
Light walls, as ensembles of oscillating bright structures rooted in sunspot light bridges, have not been well studied, although they are important for understanding sunspot properties. Using the Interface Region Imaging Spectrograph and Solar Dynamics Observatory observations, here we study the evolution of two oscillating light walls each within…
Probing the Metal Enrichment of the Intergalactic Medium at z = 5-6 Using the Hubble Space Telescope
Fan, Xiaohui; Cai, Zheng; Finlator, Kristian +2 more
We test the galactic outflow model by probing associated galaxies of four strong intergalactic C IV absorbers at z = 5-6 using the Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) ramp narrowband filters. The four strong C IV absorbers reside at z = 5.74, 5.52, 4.95, and 4.87, with column densities ranging from N C IV = 1…
Star-forming Environments throughout the M101 Group
Mihos, J. Christopher; Harding, Paul; Watkins, Aaron E.
We present a multiwavelength study of star formation within the nearby M101 Group, including new deep Hα imaging of M101 and its two companions. We perform a statistical analysis of the Hα-to-FUV flux ratios in H II regions located in three different environments: M101's inner disk, M101's outer disk, and M101's lower-mass companion galaxy NGC 547…
Nearby Young, Active, Late-type Dwarfs in Gaia's First Data Release
Zuckerman, B.; Kastner, Joel H.; Rodriguez, David +3 more
The Galex Nearby Young Star Survey (GALNYSS) has yielded a sample of ∼2000 UV-selected objects that are candidate nearby (D≲ 150 {pc}), young (age ∼ 10-100 Myr), late-type stars. Here, we evaluate the distances and ages of the subsample of (19) GALNYSS stars with Gaia Data Release 1 (DR1) parallax distances D≤slant 120 {pc}. The overall youth of t…
Emission Lines in the Near-infrared Spectra of the Infrared Quintuplet Stars in the Galactic Center
Najarro, F.; Geballe, T. R.; de la Fuente, D. +1 more
We report the detection of a number of emission lines in the 1.0-2.4 µm spectra of four of the five bright-infrared dust-embedded stars at the center of the Galactic center’s (GC) Quintuplet Cluster. Spectroscopy of the central stars of these objects is hampered not only by the large interstellar extinction that obscures all of the objects i…
Prominence Eruption Initiated by Helical Kink Instability of an Embedded Flux Rope
Gopalswamy, N.; Ravindra, B.; Vemareddy, P.
We study the triggering mechanism of a limb-prominence eruption and the associated coronal mass ejection (CME) near AR 12342 using Solar Dynamics Observatory and Large Angle and Spectrometric Coronagraph/Solar Heliospheric Observatory observations. The prominence is seen with an embedded flux thread (FT) at one end and bifurcates from the middle t…
A Face-on Accretion System in High-mass Star Formation: Possible Dusty Infall Streams within 100 AU
Hirota, Tomoya; Honma, Mareki; Sorai, Kazuo +7 more
We report on interferometric observations of a face-on accretion system around the high-mass young stellar object, G353.273+0.641. The innermost accretion system of 100 au radius was resolved in a 45 GHz continuum image taken with the Jansky-Very Large Array. Our spectral energy distribution analysis indicated that the continuum could be explained…
Discovery of a Lensed Ultrabright Submillimeter Galaxy at z = 2.0439
Rebolo, R.; Dannerbauer, H.; Díaz-Sánchez, A. +1 more
We report an ultrabright lensed submillimeter galaxy (SMG) at z = 2.0439, WISE J132934.18+224327.3, identified as a result of a full-sky cross-correlation of the AllWISE and Planck compact source catalogs aimed to search for bright analogs of the SMG SMM J2135, the Cosmic Eyelash. Inspection of archival SCUBA-2 observations of the candidates revea…