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47 papers · 1 filter
The Sloan Digital Sky Survey Reverberation Mapping Project: Composite Lags at
Jennifer I-Hsiu Li, Yue Shen, Keith Horne +13
We present composite broad-line region (BLR) reverberation-mapping lag measurements for \halpha, \hbeta, \HeII\, and \MgII\ for a sample of 144, quasars…
SDSS-IV MANGA: Spatially Resolved Star Formation Main Sequence and LI(N)ER Sequence
B. C. Hsieh, Lihwai Lin, J. H. Lin +17
We present our study on the spatially resolved H_alpha and M_star relation for 536 star-forming and 424 quiescent galaxies taken from the MaNGA survey. We show that the star format…
SDSS-IV MaNGA: Constraints on the Conditions for Star Formation in Galaxy Discs
David V. Stark, Kevin A. Bundy, Matthew E. Orr +12
Regions of disc galaxies with widespread star formation tend to be both gravitationally unstable and self-shielded against ionizing radiation, whereas extended outer discs with lit…
The Detection of Discrete Cyclotron Emission Features in Phase-Resolved Optical Spectroscopy of V1500 Cygni
Thomas E. Harrison, Ryan K. Campbell
We have obtained phase-resolved optical spectroscopy of the old nova, and asynchronous polar V1500 Cyg. These new data reveal discrete cyclotron humps from two different strength m…
The First APOKASC Catalog of Kepler Dwarf and Subgiant Stars
Aldo Serenelli, Jennifer Johnson, Daniel Huber +23
(Abridged) We present the first APOKASC catalog of spectroscopic and asteroseismic data for 415 dwarfs and subgiants. Asteroseismic data have been obtained by Kepler in short caden…
The Hercules stream as seen by APOGEE-2 South
Jason A. S. Hunt, Jo Bovy, Angeles Pérez-Villegas +15
The Hercules stream is a group of co-moving stars in the Solar neighbourhood, which can potentially be explained as a signature of either the outer Lindblad resonance (OLR) of a fa…