Robert A. Simcoe

MASE: A New Data--Reduction Pipeline for the Magellan Echellette Spectrograph (2009)

Bochanski, John J., Hennawi, Joseph F., Simcoe, Robert A., Prochaska, J. Xavier, West, Andrew A., Burgasser, Adam J., ...

We introduce a data reduction package written in Interactive Data Language (IDL) for the Magellan Echellete Spectrograph (MAGE). MAGE is a medium-resolution (R ~4100), cross-dispersed, optical...

MASE: a new data-reduction pipeline for the Magellan Echellette Spectrograph (2009)

Bochanski, John J., Hennawi, Joseph F., Simcoe, Robert A., Prochaska, J. Xavier, West, Andrew A., Burgasser, Adam J., ...

We introduce a data-reduction package written in Interactive Data Language (IDL) for the Magellan Echellete Spectrograph (MAGE). MAGE is a medium-resolution (R ∼ 4100), cross-dispersed, optical...

High Redshift Intergalactic C IV Abundance Measurements from the Near-Infrared Spectra of Two z~6 QSOs (2006)

Simcoe, Robert A.

New measurements of the z~6 intergalactic CIV abundance are presented, using moderate resolution IR spectra of two QSOs taken with GNIRS on Gemini South. These data were systematically searched for...

Discovery of excess O I absorption towards the z = 6.42 QSO SDSS J1148+5251 (2005)

Becker, George D., Sargent, Wallace L. W., Rauch, Michael, Simcoe, Robert A.

We present a search for O I in the spectra of nine 4.9 < z_qso < 6.4 QSOs taken with Keck/HIRES. We detect six systems with N(O I) > 10^13.7 cm^{-2} in the redshift intervals where O I 1302 falls...

Expansion and Collapse in the Cosmic Web (2005)

Rauch, Michael, Becker, George D., Viel, Matteo, Sargent, Wallace L. W., Smette, Alain, Simcoe, Robert A., ...

We study the kinematics of the gaseous cosmic web at high redshift with Lyman alpha forest absorption in multiple QSO sightlines. Using a simple analytic model and a cosmological hydrodynamic...

Observations of Chemically Enriched QSO Absorbers near z ~ 2.3 Galaxies: Galaxy-Formation Feedback Signatures in the IGM (2005)

Simcoe, Robert A., Sargent, Wallace L. W., Rauch, Michael, Becker, George D.

We present a study of galaxies and intergalactic gas toward the z=2.73 quasar HS1700+6416, to explore the effects of galaxy formation feedback on the IGM. Our observations and ionization simulations...

The Distribution of Metallicity in the IGM at z~2.5: OVI and CIV Absorption in the Spectra of 7 QSOs (2003)

Simcoe, Robert A., Sargent, Wallace L. W., Rauch, Michael

We present a direct measurement of the metallicity distribution function for the high redshift intergalactic medium. We determine the shape of this function using survival statistics, which account...

SN 2002cx: The Most Peculiar Known Type Ia Supernova (2003)

Li, Weidong, Filippenko, Alexei V., Chornock, Ryan, Berger, Edo, Berlind, Perry, Calkins, Michael L., ...

We present photometric and spectroscopic observations of supernova (SN) 2002cx, which reveal it to be unique among all observed type Ia supernovae (SNe Ia). SN 2002cx exhibits a SN 1991T-like...

Characterizing the Warm-Hot IGM at High Redshift: A High Resolution Survey for O VI at z = 2.5 (2002)

Simcoe, Robert A., Sargent, Wallace L. W., Rauch, Michael

We describe a survey for OVI absorption in the spectra of 5 high redshift quasars (2.2 < z < 2.8). We identify 12 cosmological systems, and 6 systems that are either ejected from the background QSO...

Sizes, Shapes, and Correlations of Lyman Alpha Clouds and Their Evolution in the CDM$+\Lambda$ Universe (1997)

Cen, Renyue, Simcoe, Robert A.

This study analyzes the sizes, shapes and correlations of $\lya$ clouds produced by a hydrodynamic simulation of a spatially flat CDM universe with a non-zero cosmological constant ($\Omega_0=0.4$,...