Search Publications
Multiple Stellar Populations of Globular Clusters from Homogeneous Ca-CN Photometry. III. NGC 6752
Lee, Jae-Woo
We present a multiple stellar population study of the globular cluster NGC 6752. We show that our new photometric CN index accurately traces the CN and the nitrogen abundances in cool giants, finding the discrete double red giant branch (RGB) and asymptotic giant branch (AGB) sequences with number ratios between the CN-weak and the CN-strong popul…
Revised Exoplanet Radii and Habitability Using Gaia Data Release 2
Wittenmyer, Robert A.; Horner, Jonathan; Wright, Duncan J. +4 more
Accurate stellar properties are crucial for determining exoplanet characteristics. Gaia DR2 presents revised distances, luminosities, and radii for 1.6 billion stars. Here, we report the calculation of revised radii and densities for 320 non-Kepler exoplanets using this data and present updated calculations of the incident flux received by 690 kno…
Transition Probabilities of Co II Weak Lines to the Ground and Low Metastable Levels
Sneden, C.; Lawler, J. E.; Cowan, J. J. +2 more
New branching fraction (BF) measurements based primarily on data from a cross-dispersed echelle spectrometer are reported for 84 lines of Co II. The BFs for 82 lines are converted to absolute atomic transition probabilities using radiative lifetimes from laser-induced fluorescence (LIF) measurements on 19 upper levels of the lines. A lifetime of 3…
The 7-year MAXI/GSC X-Ray Source Catalog in the High Galactic Latitude Sky (3MAXI)
Sakamoto, T.; Mihara, T.; Sugizaki, M. +28 more
We present the third MAXI/GSC catalog in the high Galactic latitude sky (| b| > 10^\circ ) based on the 7-year data from 2009 August 13 to 2016 July 31, complementary to that in the low Galactic latitude sky (| b| < 10^\circ ) (Hori et al. 2018). We compile 682 sources detected at significances of s D,4-10 keV ≥ 6.5 in the 4-10 ke…
Nightside Winds at the Lower Clouds of Venus with Akatsuki/IR2: Longitudinal, Local Time, and Decadal Variations from Comparison with Previous Measurements
Hueso, Ricardo; Sánchez-Lavega, Agustín; Imamura, Takeshi +16 more
We present measurements of the wind speeds at the nightside lower clouds of Venus from observations by JAXA’s mission Akatsuki during 2016, complemented by new wind measurements from ground-based observations acquired with the TNG/Near Infrared Camera Spectrometer (NICS) in 2012 and IRTF/SpeX in 2015 and 2017. The zonal and meridional components o…
A Synthetic Sample of Short-cadence Solar-like Oscillators for TESS
Chaplin, William J.; Davies, Guy R.; Girardi, Léo +4 more
NASA’s Transiting Exoplanet Survey Satellite (TESS) has begun a two-year survey of most of the sky, which will include light curves for thousands of solar-like oscillators sampled at a cadence of two minutes. To prepare for this steady stream of data, we present a mock catalog of light curves, designed to realistically mimic the properties of the …
The 7-year MAXI/GSC Source Catalog of the Low-Galactic-latitude Sky (3MAXI)
Sakamoto, T.; Mihara, T.; Sugizaki, M. +28 more
We present the first MAXI/GSC X-ray source catalog in the low-Galactic-latitude sky | b| < 10^\circ outside the Galactic center region (| b| < 5^\circ , l < 30°, and l > 330°) based on 7-year data from 2009 August 13 to 2016 July 31. To overcome source confusion in crowded regions, we have accurately calibrated the position-dependent s…
Medium-resolution Optical and Near-infrared Spectral Atlas of 16 2MASS-selected NIR-red Active Galactic Nuclei at z ∼ 0.3
Im, Myungshin; Kim, Minjin; Kim, Jae-Woo +6 more
We present medium-resolution spectra (R ∼ 2000-4000) at 0.4-1.0 µm and 0.7-2.5 µm of 16 active galactic nuclei (AGNs) selected with red color in the near-infrared (NIR) of J - K > 2.0 mag at z ∼ 0.3. We fit the Hβ, Hα, Pβ, and Pα lines from these spectra to obtain their luminosities and line widths. We derive the E(B - V) color exce…
The TOP-SCOPE Survey of PGCCs: PMO and SCUBA-2 Observations of 64 PGCCs in the Second Galactic Quadrant
Marston, Anthony; Sanhueza, Patricio; Kim, Kee-Tae +23 more
In order to understand the initial conditions and early evolution of star formation in a wide range of Galactic environments, we carried out an investigation of 64 Planck Galactic cold clumps (PGCCs) in the second quadrant of the Milky Way. Using the 13CO and C18O J = 1-0 lines and 850 µm continuum observations, we inve…
An Infrared Spectroscopic Study Toward the Formation of Alkylphosphonic Acids and Their Precursors in Extraterrestrial Environments
Kaiser, Ralf I.; Turner, Andrew M.; Abplanalp, Matthew J. +2 more
The only known phosphorus-containing organic compounds of extraterrestrial origin, alkylphosphonic acids, were discovered in the Murchison meteorite and have accelerated the hypothesis that reduced oxidation states of phosphorus were delivered to early Earth and served as a prebiotic source of phosphorus. While previous studies looking into the fo…