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Observations of Binary Stars with the Differential Speckle Survey Instrument. VI. Measures during 2014 at the Discovery Channel Telescope
van Belle, Gerard T.; Everett, Mark E.; Bjorkman, Karen S. +3 more
We present the results of 938 speckle measures of double stars and suspected double stars drawn mainly from the Hipparcos Catalog, as well as 208 observations where no companion was noted. One hundred fourteen pairs have been resolved for the first time. The data were obtained during four observing runs in 2014 using the Differential Speckle Surve…
Optical Spectroscopic Observations of Gamma-ray Blazar Candidates. IV. Results of the 2014 Follow-up Campaign
Stern, D.; Smith, Howard A.; Masetti, N. +7 more
The extragalactic γ-ray sky is dominated by the emission arising from blazars, one of the most peculiar classes of radio-loud active galaxies. Since the launch of Fermi several methods were developed to search for blazars as potential counterparts of unidentified γ-ray sources (UGSs). To confirm the nature of the selected candidates, optical spect…
A WFC3 Grism Emission Line Redshift Catalog in the GOODS-South Field
Finkelstein, Steven L.; Barro, Guillermo; Ferguson, Henry C. +19 more
We combine Hubble Space Telescope (HST)/Wide Field Camera3 (WFC3) imaging and G141 grism observations from the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) and 3D-HST surveys to produce a catalog of grism spectroscopic redshifts for galaxies in the CANDELS/GOODS-South field. The WFC3/G141 grism spectra cover a wavelengt…
Panchromatic Hubble Andromeda Treasury. XII. Mapping Stellar Metallicity Distributions in M31
Monachesi, Antonela; Dolphin, Andrew E.; Skillman, Evan D. +14 more
We present a study of spatial variations in the metallicity of old red giant branch stars in the Andromeda galaxy. Photometric metallicity estimates are derived by interpolating isochrones for over seven million stars in the Panchromatic Hubble Andromeda Treasury (PHAT) survey. This is the first systematic study of stellar metallicities over the i…
The Team Keck Redshift Survey 2: MOSFIRE Spectroscopy of the GOODS-North Field
Barro, Guillermo; Trump, Jonathan R.; Faber, S. M. +9 more
We present the Team Keck Redshift Survey 2 (TKRS2), a near-infrared spectral observing program targeting selected galaxies within the CANDELS subsection of the GOODS-North Field. The TKRS2 program exploits the unique capabilities of the Multi-Object Spectrometer For Infra-Red Exploration (MOSFIRE), which entered service on the Keck I telescope in …
Hubble Space Telescope High-Resolution Imaging of Kepler Small and Cool Exoplanet Host Stars
Kalas, Paul; Wright, Jason T.; Ciardi, David R. +3 more
High-resolution imaging is an important tool for follow-up study of exoplanet candidates found via transit detection with the Kepler mission. We discuss here Hubble Space Telescope imaging with the WFC3 of 23 stars that host particularly interesting Kepler planet candidates based on their small size and cool equilibrium temperature estimates. Resu…
A Survey of Irradiated Pillars, Globules, and Jets in the Carina Nebula
Smith, N.; Bally, J.; Hartigan, P. +1 more
We present wide-field, deep narrowband H2, Brγ, Hα, [S ii], [O iii], and broadband I- and K-band images of the Carina star formation region. The new images provide a large-scale overview of all the H2 and Brγ emission present in over a square degree centered on this signature star-forming complex. By comparing these images wi…
The Ch-class Asteroids: Connecting a Visible Taxonomic Class to a 3 µm Band Shape
Emery, Joshua P.; Rivkin, Andrew S.; Thomas, Cristina A. +1 more
Asteroids belonging to the Ch spectral taxonomic class are defined by the presence of an absorption near 0.7 µm, which is interpreted as due to Fe-bearing phyllosilicates. Phyllosilicates also cause strong absorptions in the 3 µm region, as do other hydrated and hydroxylated minerals and H2O ice. Over the past decade, spectr…
Star Formation Across the W3 Complex
Tapia, Mauricio; Román-Zúñiga, Carlos G.; Ybarra, Jason E. +3 more
We present a multi-wavelength analysis of the history of star formation in the W3 complex. Using deep, near-infrared ground-based images combined with images obtained with Spitzer and Chandra observatories, we identified and classified young embedded sources. We identified the principal clusters in the complex and determined their structure and ex…
The γ-Ray Detected Narrow-line Seyfert 1 Galaxy 1H 0323+342: Swift Monitoring and Suzaku Spectroscopy
Komossa, S.; Yuan, Weimin; Fuhrmann, L. +3 more
As a radio-loud narrow-line Seyfert 1 galaxy (NLS1) detected by Fermi/LAT in GeV γ-rays, 1H 0323+342 is a remarkable active galactic nucleus showing properties characteristic of both NLS1s and blazars. Here we present results of simultaneous X-ray and UV/optical monitoring observations on 1H 0323+342 taken with the UV/Optical Telescope and X-ray T…