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Super Star Cluster Velocity Dispersions and Virial Masses in the M82 Nuclear Starburst
Nate McCrady, James R. Graham
We use high-resolution near-infrared spectroscopy from Keck Observatory to measure the stellar velocity dispersions of 19 super star clusters (SSCs) in the nuclear starburst of M82…
Constraining the Adaptive Optics Point-Spread Function in Crowded Fields: Measuring Photometric Aperture Corrections
Christopher D. Sheehy, Nate McCrady, James R. Graham
The point-spread function (PSF) of an adaptive optics (AO) system is often poorly known. This ignorance can lead to significant systematic errors in photometry. Since the degree of…
Mass Segregation and the Initial Mass Function of Super Star Cluster M82-F
Nate McCrady, James R. Graham, William D. Vacca
We investigate the Initial Mass Function and mass segregation in super star cluster M82-F with high resolution Keck/NIRSPEC echelle spectroscopy. Cross-correlation with template su…
A Giant Outburst at Millimeter Wavelengths in the Orion Nebula
Geoffrey C. Bower, Richard L. Plambeck, Alberto Bolatto +5
BIMA observations of the Orion nebula discovered a giant flare from a young star previously undetected at millimeter wavelengths. The star briefly became the brightest compact obje…
Kinematic Masses of Super Star Clusters in M82 from High-Resolution Near-Infrared Spectroscopy
Nate McCrady, Andrea M. Gilbert, James R. Graham
Using high-resolution (R~22,000) near-infrared (1.51 -- 1.75 microns) spectra from Keck Observatory, we measure the kinematic masses of two super star clusters in M82. Cross-correl…
Optical and Near-Infrared Spectroscopy of a High-Redshift, Hard X-ray Emitting Spiral Galaxy
Steve Dawson, Nate McCrady, Daniel Stern +4
We present optical and near-infrared Keck spectroscopy of CXOHDFN J123635.6+621424 (hereafter HDFX28), a hard X-ray source at a redshift of z = 2.011 in the flanking fields of the…