Search Publications
The Effect of Environment on the Properties of the Most Massive Galaxies at 0.5 < z < 2.5 in the COSMOS-DASH Field
Lin, Zesen; Kong, Xu; Gu, Yizhou +2 more
How the environment influences the most massive galaxies is still unclear. To explore the effects of the environment on morphology and star formation in the most massive galaxies at high redshift, we select galaxies with stellar mass $\mathrm{log}({M}_{\star }/{M}_{\odot })\gt 11$ at 0.5 < z < 2.5 in the COSMOS-DASH field, which is the large…
A New Method Linking the Solar Wind Speed to the Coronal Magnetic Field
Pinto, Rui F.; Bemporad, Alessandro; Casti, Marta +2 more
The release and acceleration of the solar wind is still an outstanding question. There are several aspects related to this phenomenon that still need to be investigated, and one of these is the identification of the region within the inner corona where the larger fraction of acceleration occurs. To address this matter, it is necessary to have reli…
Statistical Signatures of Nanoflare Activity. III. Evidence of Enhanced Nanoflaring Rates in Fully Convective stars as Observed by the NGTS
Mathioudakis, M.; Wheatley, P. J.; Goad, M. R. +11 more
Previous examinations of fully convective M-dwarf stars have highlighted enhanced rates of nanoflare activity on these distant stellar sources. However, the specific role the convective boundary, which is believed to be present for spectral types earlier than M2.5V, plays on the observed nanoflare rates is not yet known. Here, we utilize a combina…
Characterizing CO Emitters in the SSA22-AzTEC26 Field
Tamura, Yoichi; Kohno, Kotaro; Kawabe, Ryohei +5 more
We report the physical characterization of four CO emitters detected near the bright submillimeter galaxy (SMG) SSA22-AzTEC26. We analyze the data from Atacama Large Millimeter/submillimeter Array band 3, 4, and 7 observations of the SSA22-AzTEC26 field. In addition to the targeted SMG, we detect four line emitters with signal-to-noise ratio >5…
Nonlinear Fast Magnetosonic Waves in Solar Prominence Pillars
DeVore, C. Richard; Ofman, Leon; Kucera, Therese A.
We investigate the properties of nonlinear fast magnetosonic (NFM) waves in a solar prominence, motivated by recent high-resolution and high-cadence Hinode/Solar Optical Telescope (SOT) observations of small-scale oscillations in a prominence pillar. As an example, we analyze the details of the 2012 February 14 Hinode/SOT observations of quasi-per…
X-Ray Unveiling Events in a z ≈ 1.6 Active Galactic Nucleus in the 7 Ms Chandra Deep Field-South
Trump, Jonathan R.; Brandt, W. N.; Vignali, C. +14 more
We investigate the extreme X-ray variability of a z = 1.608 active galactic nucleus in the 7 Ms Chandra Deep Field-South (XID 403), which showed two significant X-ray brightening events. In the first event, XID 403 brightened by a factor of >2.5 in ≲6.1 rest-frame days in the observed-frame 0.5-5 keV band. The event lasted for ≈5.0-7.3 days, an…
Gravitational Redshift Detection from the Magnetic White Dwarf Harbored in RX J1712.6-2414
Ishida, Manabu; Hayashi, Takayuki; Mori, Hideyuki +2 more
Gravitational redshift is a fundamental parameter that allows us to determine the mass-to-radius ratio of compact stellar objects, such as black holes, neutron stars, and white dwarfs (WDs). In the X-ray spectra of the close binary system, RX J1712.6-2414, obtained from the Chandra High Energy Transmission Grating observation, we detected signific…
Inferring the Solar Meridional Circulation Flow Profile by Applying Bayesian Methods to Time-Distance Helioseismology
Jackiewicz, Jason; Herczeg, Aleczander
Mapping the large-scale subsurface plasma flow profile within the Sun has been attempted using various methods for several decades. One such flow in particular is the meridional circulation, for which numerous studies have been published. However, such studies often show disagreement in structure. In an effort to constrain the flow profile from th…
ALMA Millimeter/Submillimeter Sources among Spitzer SMUVS Galaxies at z > 2 in the COSMOS Field
Caputi, Karina I.; Suzuki, Tomoko L.; van Mierlo, Sophie E.
Submillimeter observations reveal the star formation activity obscured by dust in the young Universe. It still remains unclear how galaxies detected at submillimeter wavelengths are related to ultraviolet/optical-selected galaxies in terms of their observed quantities, physical properties, and evolutionary stages. Deep near- and mid-infrared obser…
Supernova Remnants in the Irregular Galaxy NGC 4449
Blair, William P.; Long, Knox S.; Winkler, P. Frank
The nearby irregular galaxy NGC 4449 has a star formation rate of ~0.4M ☉ yr-1 and should host of order 70 supernova remnants (SNRs) younger than 20,000 yr, a typical age for SNRs expanding into an interstellar medium (ISM) with a density of 1 cm-3 to reach the radiative phase. We have carried out an optical imagin…