Search Publications
Photometric properties of classical bulge and pseudo-bulge galaxies at 0.5 ≤ z < 1.0
Hu, Jia; Cui, Qifan; Wang, Lan +2 more
Context. We compare the photometric properties and specific star formation rate (sSFR) of classical- and pseudo-bulge galaxies with M∗ ≥ 109.5 M⊙ at 0.5 ≤ z < 1.0, selected from all five CANDELS fields. We also compare these properties of bulge galaxies at lower redshift selected from MaNGA survey in previous wo…
Ultraviolet extinction correlation with 3D dust maps using white dwarfs
Redfield, Seth; Sahu, Snehalata; Gänsicke, Boris T. +2 more
Accurate astrometric and photometric measurements from Gaia have led to the construction of 3D dust extinction maps which can now be used for estimating the integrated extinctions of Galactic sources located within 5 kpc. These maps based on optical observations may not be reliable for use in the ultraviolet (UV) which is more sensitive to reddeni…
Radar Observations of Liquid Water in the South Polar Region of Mars: Indications from Astrobiology Perspectives
Xiong, Siting; Ding, Chunyu; Su, Yan +4 more
In recent decades, extensive research has led to the understanding that Mars once hosted substantial liquid-water reserves. While the current Martian landscape boasts significant water-ice deposits at its North and South poles, the elusive presence of liquid-water bodies has remained undetected. A breakthrough occurred with the identification of r…
The Formation of Filaments and Dense Cores in the Cocoon Nebula (IC 5146)
Kwon, Woojin; Cho, Jungyeon; Chung, Eun Jung +4 more
We present 850 µm linear polarization and C18O (3 ‑ 2) and 13CO (3 ‑ 2) molecular line observations toward the filaments (F13 and F13S) in the Cocoon Nebula (IC 5146) using the JCMT POL-2 and Heterodyne Array Receiver Program instruments. F13 and F13S are found to be thermally supercritical with identified dense cores a…
A morphological analysis of the galaxy cluster XLSSC 122 at z = 1.98
Canning, R. E. A.; Willis, J. P.; Rennehan, D. +1 more
We present a morphological analysis of 29 spectroscopically confirmed members of XLSSC 122, a massive galaxy cluster at
Theia 456: Tidally Shredding an Open Cluster
Cargile, Phillip A.; Agüeros, Marcel A.; Curtis, Jason L. +4 more
The application of clustering algorithms to the Gaia astrometric catalog has revolutionized our census of stellar populations in the milky Way, including the discovery of many new dispersed structures. We focus on one such structure, Theia 456 (COIN-Gaia-13), a loosely bound collection of ∼320 stars spanning ∼120 pc that has previously been shown …
Deep learning-based prediction of CME-driven shock standoff distances in metric type II radio emissions
Elsaid, Ahmed; Mahrous, Ayman; Hamada, Amr +1 more
Type II radio emissions are events mostly found to be associated with coronal mass ejections (CMEs) and accelerated by the CME-driven shock in the heliosphere. This study reports on the estimation of the CME-shock standoff distance at the commencement of metric type II radio emissions by combining the CME-deprojected speed and spectral features of…
Zonal and Regional Jupiter Brightness Trends from the Hubble Outer Planet Atmospheres Legacy Program
Wong, Michael H.; Simon, Amy A.
The Hubble Outer Planet Atmospheres Legacy program began in 2014 and has observed Jupiter yearly from 2015 to 2024. Using high spatial resolution imaging from the Hubble Wide Field Camera 3, brightness trends were investigated focusing on the unique UV capability and absolute calibration consistency of the Hubble Space Telescope. From these data, …
Modeling the Wavelength Dependence of Pixel Response Nonuniformity of a CCD Sensor
Meng, Xianmin; Du, Wei; Zhan, Hu +2 more
Precision measurements in astronomy require stringent control of systematics such as those arising from imperfect correction of sensor effects. In this work, we develop a parametric method to model the wavelength dependence of pixel response nonuniformity (PRNU) for a laser-annealed backside-illuminated charge-coupled device. The model accurately …
Meridional Circulations of the Solar Magnetic Fields of Different Strength
Bilenko, Irina A.
The meridional circulation of the solar magnetic fields in Solar Cycles 21 – 24 was considered. Data from both ground-based and space observatories were used. Three types of time–latitude distributions of photospheric magnetic fields and their meridional circulations were identified depending on the magnetic-field intensity. (i) Low-strength magne…