Search Publications
Chromospheric Activity of Periodic Variable Stars Based on the LAMOST Low- and Medium-resolution Spectral Survey
Shi, Jianrong; Han, Xianming L.; Zhang, Li-yun +5 more
We present a catalog of 75,867 periodic variable stars from data release 7 of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope. We calculated the chromospheric activity index, equivalent widths for 201,349 spectra, and excess fractional luminosity ( ${R}_{{\rm{H}}\alpha }^{{\prime} }$ ) for 130,796 spectra. Based on the intensity of t…
Hubble Frontier Field Clusters and Their Parallel Fields: Photometric and Photometric Redshift Catalogs
Mobasher, Bahram; Davidzon, I.; Sánchez, F. J. +1 more
We present a multiband analysis of the six Hubble Frontier Field clusters and their parallel fields, producing catalogs with measurements of source photometry and photometric redshifts. We release these catalogs to the public along with maps of intracluster light and models for the brightest galaxies in each field. This rich data set covers a wave…
Improved Atomic Transition Probabilities for UV and Optical Lines of Hf II and Determination of the Hf Abundance in Two Metal-poor Stars
Roederer, I. U.; Lawler, J. E.; Den Hartog, E. A.
We report new branching fraction measurements for 199 UV and optical transitions of Hf II. These transitions range in wavelength (wavenumber) from 2068 to 6584 Å (48,322-15,183 cm-1) and originate in 17 odd-parity upper levels ranging in energy from 38,578 to 53,227 cm-1. The branching fractions are combined with radiative li…
The HASHTAG Project: The First Submillimeter Images of the Andromeda Galaxy from the Ground
Ho, Luis C.; Lee, Chien-Hsiu; Clark, Christopher J. R. +46 more
Observing nearby galaxies with submillimeter telescopes on the ground has two major challenges. First, the brightness is significantly reduced at long submillimeter wavelengths compared to the brightness at the peak of the dust emission. Second, it is necessary to use a high-pass spatial filter to remove atmospheric noise on large angular scales, …
X-Ray-to-radio Offset Inference from Low-count X-Ray Jets
Georganopoulos, Markos; Meyer, Eileen T.; Reddy, Karthik
Observations of positional offsets between the location of X-ray and radio features in many resolved, extragalactic jets indicates that the emitting regions are not cospatial, an important piece of evidence in the debate over the origin of the X-ray emission on kiloparsec scales. The existing literature is nearly exclusively focused on jets with s…
Background Short-period Eclipsing Binaries in the Original Kepler Field
Bódi, Attila; Szabó, Róbert; Forró, Adrienn +2 more
During the primary Kepler mission, between 2009 and 2013, about 150,000 preselected targets were observed with a 29.42 minute long cadence. However, a survey of background stars that fall within the field of view (FOV) of the downloaded apertures of the primary targets has revealed a number of interesting objects. In this paper, we present the res…
Census of High- and Medium-mass Protostars. V. CO Abundance and the Galactic XCO Factor
Pitts, Rebecca L.; Barnes, Peter J.
We present the second dust continuum data release in the Census of High- and Medium-mass Protostars (CHaMP), expanding the methodology trialed in Pitts et al. to the entire CHaMP survey area (280° < ℓ < 300°, - 4° < b < + 2°). This release includes maps of dust temperature (Td), H2 column density ( ${N}_{{{\rm{H}}…
Extended HNCO, SiO, and HC3N Emission in 43 Southern Star-forming Regions
Liu, Hong-Li; Zhou, Jian-Jun; Wu, Gang +9 more
We have selected 43 southern massive star-forming regions to study the spatial distribution of HNCO 404-303, SiO 2-1, and HC3N 10-9 line emission and to investigate their spatial association with the dust emission. The morphology of HNCO 404-303 and HC3N 10-9 agrees well with the du…
A Spectroscopic Study of Supernova Remnants with the Infrared Space Observatory
Rho, Jeonghee; Ravi, Aravind P.; Park, Sangwook +1 more
We present far-infrared (FIR) spectroscopy of supernova remnants (SNRs) based on the archival data of the Infrared Space Observatory taken with the Long Wavelength Spectrometer (LWS). Our sample includes previously unpublished profiles of line and continuum spectra for 20 SNRs in the Galaxy and Magellanic Clouds. In several SNRs including G21.5-0.…
Radio Counterparts of Gamma-Ray Sources in the Cygnus Region
Benaglia, Paula; Ishwara-Chandra, C. H.; Colazo, Marcelo E. +3 more
The view of the gamma-ray universe is being continuously expanded by space high-energy (HE) and ground-based very-high-energy (VHE) observatories. Yet, the angular resolution limitation still precludes a straightforward identification of these gamma-ray emitting sources. Radio observations are an effective tool for searching their possible counter…