Search Publications
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…
A Search for Variable Stars in the Globular Cluster M4 with K2
Wallace, Joshua J.; Hartman, Joel D.; Bakos, Gáspár Á. +1 more
We extract light curves for 4554 objects with 9 < G < 19 in the K2 superstamp observations of the globular cluster M4, including 3784 cluster members, and search for variability. Among cluster-member objects, we detect 66 variables, of which 52 are new discoveries. Among objects not belonging to the cluster, we detect 24 variables, of which …
The Kepler Smear Campaign: Light Curves for 102 Very Bright Stars
Davies, Guy R.; Bieryla, Allyson; Latham, David W. +19 more
We present the first data release of the Kepler Smear Campaign, using collateral “smear” data obtained in the Kepler four-year mission to reconstruct light curves of 102 stars too bright to have been otherwise targeted. We describe the pipeline developed to extract and calibrate these light curves and show that we attain photometric precision comp…
An Hα Imaging Survey of All (Ultra)luminous Infrared Galaxies at Decl. ≥ -30° in the GOALS Sample
Wu, Hong; Cao, Chen; Jin, Jun-Jie +5 more
This paper presents the result of Hα imaging for luminous and ultraluminous infrared galaxies. It is a complete subsample of the Great Observatories All-sky LIRG Survey (GOALS) with decl. ≥ -30°, and consists of 148 galaxies with log(L IR/L ⊙) ≥ 11.0. All the Hα images were carried out using the 2.16 m telescope at the Xinglo…
Bright Southern Variable Stars in the bRing Survey
Ireland, Michael J.; Bailey, John I., III; Kenworthy, Matthew A. +9 more
In addition to monitoring the bright star β Pic during the near-transit event for its giant exoplanet, the β Pictoris b Ring (bRing) observatories at Siding Springs Observatory, Australia and Sutherland, South Africa have monitored the brightnesses of bright stars (V ≃ 4-8 mag) centered on the south celestial pole (δ ≤ -30°) for approximately two …
Spatial Variation of the Chemical Properties of Massive Star-forming Clumps
Zhou, Jianjun; Esimbek, Jarken; He, Yuxin +4 more
We selected 90 massive star-forming clumps with strong N2H+(1-0), HCO+(1-0), HCN(1-0), and HNC(1-0) emission from the Millimetre Astronomy Legacy Team 90 GHz survey. We obtained Herschel data for all 90 sources and NRAO VLA Sky Survey data for 51 of them. We convolved and regridded all images to the same resolution…
Surveying the Bright Stars by Optical Interferometry. II. A Volume-limited Multiplicity Survey of Main-sequence F Stars
Hutter, D. J.; Tycner, C.; Zavala, R. T. +3 more
We present the results of a multiplicity survey for a volume-limited sample of 29 main-sequence F0-G0 stars within 17 pc conducted with the Navy Precision Optical Interferometer (NPOI). Four companions were detected in previously known binary systems. The results for these stars show good agreement with previously published orbits. For one of thes…