Search Publications
Spitzer Catalog of Herschel-selected Ultrared Dusty Star-forming Galaxies
Serjeant, Stephen; Dunne, Loretta; Ashby, Matthew L. N. +24 more
The largest Herschel extragalactic surveys, H-ATLAS and HerMES, have selected a sample of “ultrared” dusty star-forming galaxies (DSFGs) with rising SPIRE flux densities (S 500 > S 350 > S 250; the so-called “500 µm risers”) as an efficient way for identifying DSFGs at higher redshift (z > 4). In thi…
Cassini Composite Infrared Spectrometer (CIRS) Observations of Titan 2004-2017
Bézard, Bruno; Vinatier, Sandrine; Lellouch, Emmanuel +16 more
From 2004 to 2017, the Cassini spacecraft orbited Saturn, completing 127 close flybys of its largest moon, Titan. Cassini’s Composite Infrared Spectrometer (CIRS), one of 12 instruments carried on board, profiled Titan in the thermal infrared (7-1000 µm) throughout the entire 13 yr mission. CIRS observed on both targeted encounters (flybys) …
A New Automatic Tool for CME Detection and Tracking with Machine-learning Techniques
Zhang, Yan; Feng, Li; Lu, Lei +7 more
With the accumulation of coronal mass ejection (CME) observations by coronagraphs, automatic detection and tracking of CMEs has proven to be crucial. The excellent performance of the convolutional neural network in image classification, object detection, and other computer vision tasks motivates us to apply it to CME detection and tracking as well…
Identifying Spectral Lines to Study Coronal Mass Ejection Evolution in the Lower Corona
Landi, Enrico; Rivera, Yeimy J.; Lepri, Susan T.
As prominences propagate away from the Sun via a coronal mass ejection (CME), they expand, accelerate, and are strongly heated. The heating is substantial enough to continuously ionize the prominence plasma, making it difficult to follow its dynamic evolution with a single extreme ultraviolet (EUV) narrow-band channel or a white light instrument. …
Nonlinear Color-Metallicity Relations of Globular Clusters. VIII. Reproducing Color Distributions of Individual Globular Cluster Systems in the Virgo and Fornax Galaxy Clusters
Chung, Chul; Lee, Sang-Yoon; Yoon, Suk-Jin
The color distributions of globular clusters (GCs) in individual early-type galaxies show great diversity in their morphology. Based on the conventional “linear” relationship between the colors and metallicities of GCs, the GC metallicity distributions inferred from colors and in turn their formation histories, should be as diverse as they appear.…
The Ultraviolet Detection of Diffuse Gas in Galaxy Groups
Danforth, Charles W.; Stocke, John T.; Jannuzi, Buell +5 more
A small survey of the UV-absorbing gas in 12 low-z galaxy groups has been conducted using the Cosmic Origins Spectrograph on board the Hubble Space Telescope. Targets were selected from a large, homogeneously selected sample of groups found in the Sloan Digital Sky Survey. A critical selection criterion excluded sight lines that pass close (<1.…
The UBV Color Evolution of Classical Novae. III. Time-stretched Color-Magnitude Diagram of Novae in Outburst
Kato, Mariko; Hachisu, Izumi
We propose a modified color-magnitude diagram for novae in outburst, i.e., (B - V)0 versus (M V - 2.5 log f s), where f s is the time-scaling factor of a (target) nova against a comparison (template) nova, (B - V)0 is the intrinsic B - V color, and M V is the absolute V magnitud…
A Catalog of Galaxies in the Direction of the Perseus Cluster
Wittmann, Carolin; Kotulla, Ralf; Lisker, Thorsten +4 more
We present a catalog of 5437 morphologically classified sources in the direction of the Perseus galaxy cluster core, among them 496 early-type low-mass galaxy candidates. The catalog is primarily based on V-band imaging data acquired with the William Herschel Telescope, which we used to conduct automated source detection and derive photometry. We …
SPECTRUM: Synthetic Spectral Calculations for Global Space Plasma Modeling
Gombosi, T. I.; Toth, G.; Landi, E. +3 more
High-resolution spectroscopy is the most accurate tool for measuring the properties of the solar corona. However, interpreting measured line intensities and line profiles emitted by the optically thin solar corona is complicated by line-of-sight (LOS) integration, which leads to measuring weighted averages of the plasma properties along the LOS. L…
CO Outflow Candidates toward the W3/4/5 Complex I: The Sample and Its Spatial Distribution
Xu, Ye; Yan, Qing-Zeng; Sun, Yan +3 more
Using the Purple Mountain Observatory Delingha 13.7 m telescope, we conducted a large-scale 12CO ≤ft(J=1\to 0\right) outflow survey (over ∼110 deg2) toward the W3/4/5 complex and its surroundings. In total, 459 outflow candidates were identified. Approximately 62% (284) were located in the Perseus arm, including the W3/4/5 co…