Search Publications
A Catalog of Candidate Double and Lensed Quasars from Gaia and WISE Data
Secrest, Nathan J.; Makarov, Valeri V.
Making use of strong correlations between closely separated multiple or double sources and photometric and astrometric metadata in Gaia Early Data Release 3 (EDR3), we generate a catalog of candidate double- and multiply imaged lensed quasars and active galactic nuclei (AGNs), comprising 3140 systems. It includes two partially overlapping parts: a…
Characterization of Low-mass Companions to Kepler Objects of Interest Observed with APOGEE-N
Bizyaev, Dmitry; Schneider, Donald P.; Mahadevan, Suvrath +12 more
We report the characterization of 28 low-mass (0.02 M ⊙ ≤ M 2 ≤ 0.25 M ⊙) companions to Kepler objects of interest (KOIs), eight of which were previously designated confirmed planets. These objects were detected as transiting companions to Sunlike stars (G and F dwarfs) by the Kepler mission and are confirmed as si…
A 9 Month Hubble Space Telescope Near-UV Survey of M87. I. Light and Color Curves of 94 Novae, and a Redetermination of the Nova Rate
Graur, Or; Shara, Michael M.; Meyer, Eileen T. +10 more
M87 has been monitored with a cadence of 5 days over a span of 9 months through the near-ultraviolet (NUV; F275W) and optical (F606W) filters of the Wide Field Camera 3 (WFC3) of the Hubble Space Telescope. This unprecedented dataset yields the NUV and optical light and color curves of 94 M87 novae, characterizing the outburst and decline properti…
The [S II] Spectral Images of the Planetary Nebula NGC 7009. II. Major Axis
Otsuka, Masaaki; Hyung, Siek; Lee, Seong-Jae
We derived position-velocity density distribution diagrams along the major (PA = 77°) axis of the elliptical planetary nebula NGC 7009 with the Keck HIRES [S II] 6716/6731 Å doublet spectral images. The average densities of the main shell and knots of NGC 7009 derived from the [S II] 6716/6731 Å fluxes integrated over the line of sight indicate a …
Validating Stellar Abundance Measurements from Multiresolution Spectroscopy
Ting, Yuan-Sen; Weisz, Daniel R.; Sandford, Nathan R.
Large-scale surveys will provide spectroscopy for ~50 million resolved stars in the Milky Way and Local Group. However, these data will have a high degree of heterogeneity and most will be low-resolution (R < 10,000), posing challenges to measuring consistent and reliable stellar labels. Here, we introduce a framework for identifying and remedy…
Investigating the Impact of Metallicity on Star Formation in the Outer Galaxy. I. VLT/KMOS Survey of Young Stellar Objects in Canis Major
Herczeg, Gregory J.; Tabone, Benoît; Fischer, William J. +9 more
The effects of metallicity on the evolution of protoplanetary disks may be studied in the outer Galaxy where the metallicity is lower than in the solar neighborhood. We present the VLT/KMOS integral field spectroscopy in the near-infrared of ~120 candidate young stellar objects (YSOs) in the CMa-ℓ224 star-forming region located at a Galactocentric…
The Swift Deep Galactic Plane Survey (DGPS) Phase I Catalog
Mukai, K.; Troja, E.; Cenko, S. B. +30 more
The Swift Deep Galactic Plane Survey (DGPS) is a Swift Key Project consisting of 380 tiled pointings covering ~40 deg2 of the Galactic plane between longitude 10 < ∣l∣ < 30 deg and latitude ∣b∣ < 0.5 deg. Each pointing has a 5 ks exposure, yielding a total of 1.9 Ms spread across the entire survey footprint. Phase I observation…
S-type Stars from LAMOST DR10: Classification of Intrinsic and Extrinsic Stars
Luo, A. -Li; Li, Yin-Bi; Li, Shuo +2 more
In this paper, we found 2939 S-type stars from LAMOST Data Release 10 using two machine-learning methods, and 2306 of them were reported for the first time. The main purpose of this work is to study how to divide S-type stars into intrinsic and extrinsic stars with photometric data and LAMOST spectra. Using infrared photometric data, we adopted tw…
Infrared Galaxies Detected by the Atacama Cosmology Telescope
Kilerci, Ece; Hashimoto, Tetsuya; Goto, Tomotsugu +4 more
We report on 167 infrared (IR) galaxies selected by AKARI and IRAS and detected in the Atacama Cosmology Telescope (ACT) Data Release 5 (DR5) sky maps at the 98, 150, and 220 GHz frequency bands. Of these detections, 134 (80%) of the millimeter counterparts are first-time identifications with ACT. We expand the previous ACT extragalactic source ca…
Spectral Energy Distributions of Southern Binary X-Ray Sources
Tomsick, John A.; Vrtilek, S. D.; Dickey, John M. +5 more
The rapid variability of X-ray binaries (XRBs) produces a wide range of X-ray states that are linked to activity across the electromagnetic spectrum. It is particularly challenging to study a sample of sources large enough to include all types in their various states, and to cover the full range of frequencies that show flux density variations. Si…