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16 papers · 2 filters
SDSS-IV MaStar: Theoretical Atmospheric Parameters for the MaNGA Stellar Library
Lewis Hill, Daniel Thomas, Claudia Maraston +16
We calculate the fundamental stellar parameters effective temperature, surface gravity and iron abundance - T, log g, [Fe/H] - for the final release of the Mapping Near…
A gravitational and dynamical framework of star formation: The Orion Nebula
Marina Kounkel, Keivan G. Stassun, Kevin Covey +1
The Orion Nebula Cluster (ONC) is the most massive region of active star formation within a kpc of the Sun. Using Gaia DR3 parallaxes and proper motions, we examine the bulk motion…
Quasars with Periodic Variability: Capabilities and Limitations of Bayesian Searches for Supermassive Black Hole Binaries in Time-Domain Surveys
Caitlin A. Witt, Maria Charisi, Stephen R. Taylor +1
Supermassive black hole binaries (SMBHBs) are an inevitable consequence of galaxy mergers. At subparsec separations, they are practically impossible to resolve, and the most promis…
Extremely efficient mergers of intermediate mass black hole binaries in nucleated dwarf galaxies
Fazeel Mahmood Khan, Kelly Holley-Bockelmann
Gravitational waves emitted by merging black holes between will be detectable by the Laser Interferometer Space Antenna (LISA) with signal-to-noise ratios…
Final Targeting Strategy for the SDSS-IV APOGEE-2S Survey
Felipe A. Santana, Rachael L. Beaton, Kevin R. Covey +43
APOGEE is a high-resolution (R sim 22,000), near-infrared, multi-epoch, spectroscopic survey of the Milky Way. The second generation of the APOGEE project, APOGEE-2, includes an ex…
Final Targeting Strategy for the SDSS-IV APOGEE-2N Survey
Rachael L. Beaton, Ryan J. Oelkers, Christian R. Hayes +57
APOGEE-2 is a dual-hemisphere, near-infrared (NIR), spectroscopic survey with the goal of producing a chemo-dynamical mapping of the Milky Way Galaxy. The targeting for APOGEE-2 is…
Chemical Cartography with APOGEE: Mapping Disk Populations with a Two-Process Model and Residual Abundances
David H. Weinberg, Jon A. Holtzman, Jennifer A. Johnson +33
We apply a novel statistical analysis to measurements of 16 elemental abundances in 34,410 Milky Way disk stars from the final data release (DR17) of APOGEE-2. Building on recent w…
Membership lists for 431 open clusters in Gaia DR2 using extreme deconvolution gaussian mixture models
Karl Jaehnig, Jonathan Bird, Kelly Holley-Bockelmann
Open clusters are groups of stars that form at the same time, making them an ideal laboratory to test theories of star formation, stellar evolution, and dynamics in the Milky Way d…
Refining the E+A Galaxy: A Spatially Resolved Spectrophotometric Sample of Nearby Post-starburst Systems in SDSS-IV MaNGA (MPL-5)
Olivia A. Greene, Miguel R. Anderson, Mariarosa Marinelli +3
Post-starburst galaxies are crucial to disentangling the effect of star formation and quenching on galaxy demographics. They comprise, however, a heterogeneous population of object…
Properties of cold molecular gas in four type-1 active galaxies hosting outflows
Jessie C. Runnoe, Kayhan Gültekin, David Rupke +1
Feedback from active galactic nuclei (AGN) has proven to be a critical ingredient in the current picture of galaxy assembly and growth. However, observational constraints on AGN-dr…
The Search for Binary Supermassive Black Holes Amongst Quasars with Offset Broad Lines Using the Very Long Baseline Array
Peter Breiding, Sarah Burke-Spolaor, Michael Eracleous +4
In several previous studies, quasars exhibiting broad emission lines with >1000 km/s velocity offsets with respect to the host galaxy rest frame have been discovered. One leading h…
Stellar Migration and Chemical Enrichment in the Milky Way Disc: A Hybrid Model
James W. Johnson, David H. Weinberg, Fiorenzo Vincenzo +6
We develop a hybrid model of galactic chemical evolution that combines a multi-ring computation of chemical enrichment with a prescription for stellar migration and the vertical di…
Deciphering the 3-D Orion Nebula-IV: The HH~269 flow emerges from the Orion-S Embedded Molecular Cloud
C. R. O'Dell, N. P. Abel, G. J. Ferland
We have extended the membership and determined the 3-D structure of the large (0.19 pc) HH~269 sequence of shocks in the Orion Nebula. All of the components lie along a track that…
Quantifying scatter in galaxy formation at the lowest masses
Ferah Munshi, Alyson Brooks, Elaad Applebaum +3
We predict the stellar mass -- halo mass (SMHM) relationship for dwarf galaxies, using simulated galaxies with peak halo masses of M M down into th…
Deciphering the 3-D Orion Nebula-III: Structure on the NE boundary of the Orion-S Embedded Molecular Cloud
C. R. O'Dell, G. J. Ferland, N. P. Abel
We have extended the work of Papers I and II of this series to determine at higher spatial resolution the properties of the embedded Orion-S Molecular Cloud that lies within the io…
The NANOGrav 11yr Data Set: Limits on Supermassive Black Hole Binaries in Galaxies within 500Mpc
Zaven Arzoumanian, Paul T. Baker, Adam Brazier +54
Supermassive black hole binaries (SMBHBs) should form frequently in galactic nuclei as a result of galaxy mergers. At sub-parsec separations, binaries become strong sources of low-…