3D Spectroscopic Instrumentation (2009)
In this Chapter we review the challenges of, and opportunities for, 3D spectroscopy, and how these have lead to new and different approaches to sampling astronomical information. We describe and...
Puerto de la Cruz, Tenerife (2008)
Winter School, Martin M. Roth, Matthew A. Bershady, Frank Eisenhauer, Luis Colina Robledo, ...
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Deconstructing Disk Velocity Distribution Functions in the Disk-Mass Survey (2008)
Westfall, Kyle B., Bershady, Matthew A., Verheijen, Marc A. W., Andersen, David R., Swaters, Rob A.
We analyze integral-field ionized gas and stellar line-of-sight kinematics in the context of determining the stellar velocity ellipsoid for spiral galaxies observed by the Disk-Mass Survey. Our new...
Mentuch, Erin, Scott, Alan D., Abraham, Roberto G., Barton, Elizabeth J., Bershady, Matthew A., Bland-Hawthorn, Joss, ...
Abstract not available.
Mentuch, Erin, Scott, Alan D., Abraham, Roberto G., Barton, Elizabeth J., Bershady, Matthew A., Bland-Hawthorn, Joss, ...
Abstract not reproduced here by request of the publisher. The text is available from: http://dx.doi.org/10.1117/12.789692.
The Asymmetry of Galaxies: Physical Morphology for Nearby and High Redshift Galaxies (2007)
Christopher Conselice Matthew, Matthew A. Bershady, Anna Jangren
We present a detailed study of rotational asymmetry in galaxies for both morphological and physical diagnostic purposes. An unambiguous method for computing asymmetry is developed, robust for both...
The Symmetry, Color and Morphology of Galaxies in the Hubble Deep Field (2007)
Christopher J. Conselice, Matthew A. Bershady
We present a new method of utilizing the color and asymmetry values for galaxies in the Hubble Deep Field to determine both their morphological features and physical parameters. By using a...
Hobby-Eberly Telescope's (HET) Medium Resolution Spectrograph (MRS). (2007)
We describe two fiber-optical arrays under construction for the 9m
Galaxy Kinematics with Integral Field Spectroscopy (2007)
David R. Andersen, Matthew A. Bershady
The integral field unit (IFU), nicknamed "Spider " (Figure 1), is a fiber optic array under construction for the 9m Hobby-Eberly Telescope's (HET) Medium Resolution...
D. J. Pisano, Henry A. Kobulnicky, Matthew A. Bershady
We present Arecibo 21 cm spectroscopy, Keck HIRES Hfi spectroscopy, and WIYN R-band imaging of 11 nearby blue compact galaxies with effective B-band surface brightness SBe =19.4-21.2 mag arcsec...
Burgh, Eric B., Bershady, Matthew A., Westfall, Kyle B., Nordsieck, Kenneth H.
We report the discovery of optical ghosts generated when using Volume Phase Holographic (VPH) gratings in spectrographs employing the Littrow configuration. The ghost is caused by light reflected off...
Integral Field Unit Observations of NGC 4302: Kinematics of the Diffuse Ionized Gas Halo (2007)
Heald, George H., Rand, Richard J., Benjamin, Robert A., Bershady, Matthew A.
We present moderate resolution spectroscopy of extraplanar diffuse ionized gas (EDIG) emission in the edge-on spiral galaxy NGC 4302. The spectra were obtained with the SparsePak integral field unit...
A Search for Low Surface Brightness Structure Around Compact Narrow Emission Line Galaxies (2006)
Barton, Elizabeth J., Van Zee, Liese, Bershady, Matthew A.
As the most extreme members of the rapidly evolving faint blue galaxy population at intermediate redshift, the compact narrow emission line galaxies (CNELGs) are intrinsically luminous (-22 < M_B <...
The NIR Upgrade to the SALT Robert Stobie Spectrograph (2006)
Sheinis, Andrew I., Wolf, Marsha J., Bershady, Matthew A., Buckley, David A. H., Nordsieck, Kenneth H., Williams, Ted B.
The near infrared (NIR) upgrade to the Robert Stobie Spectrograph (RSS) on the Southern African Large Telescope (SALT), RSS/NIR, extends the spectral coverage of all modes of the visible arm. The...
Andersen, David R., Bershady, Matthew A., Sparke, Linda S., Gallagher, John S., Wilcots, Eric M., ...
We present a survey of the photometric and kinematic properties of 39 nearby, nearly face-on disk galaxies. Our approach exploits echelle-resolution integral-field spectroscopy of the H-alpha...
Integral Field Unit Observations of NGC 891: Kinematics of the Diffuse Ionized Gas Halo (2006)
Heald, George H., Rand, Richard J., Benjamin, Robert A., Bershady, Matthew A.
We present high and moderate spectral resolution spectroscopy of diffuse ionized gas (DIG) emission in the halo of NGC 891. The data were obtained with the SparsePak integral field unit at the WIYN...
The Disk Mass Project: breaking the disk-halo degeneracy (2005)
Verheijen, Marc A. W., Bershady, Matthew A., Swaters, Rob A., Andersen, David R., Westfall, Kyle B.
Little is known about the content and distribution of dark matter in spiral galaxies. To break the degeneracy in galaxy rotation curve decompositions, which allows a wide range of dark matter halo...
Asymmetric Drift and the Stellar Velocity Ellipsoid (2005)
Westfall, Kyle B., Bershady, Matthew A., Verheijen, Marc A. W., Andersen, David R., Swaters, Rob A.
We present the decomposition of the stellar velocity ellipsoid using stellar velocity dispersions within a 40 deg wedge about the major-axis (sigma_maj), the epicycle approximation, and the...
Total Galaxy Magnitudes and Effective Radii from Petrosian Magnitudes and Radii (2005)
Graham, Alister W., Driver, Simon P., Petrosian, Vahe', Conselice, Christopher J., Bershady, Matthew A., Crawford, Steven M., ...
Petrosian magnitudes were designed to help with the difficult task of determining a galaxy's total light. Although these magnitudes (taken here as the flux within 2R_P, with the inverted Petrosian...
Are There Local Analogs of Lyman Break Galaxies? (2005)
Lowenthal, James D., Durham, R. Nick, Lyons, Brian J., Bershady, Matthew A., Gallego, Jesus, Guzman, Rafael, ...
To make direct comparisons in the rest-far-ultraviolet between LBGs at z~3 and more local star-forming galaxies, we use HST/STIS to image a set of 12 nearby (z
Total galaxy magnitudes and effective radii from Petrosian magnitudes and radii (2005)
Graham, Alister W., Driver, Simon P., Petrosian, Vahe, Conselice, Christopher J., Bershady, Matthew A., Crawford, Steven M., ...
Petrosian magnitudes were designed to help with the difficult task of determining a galaxy's total light. Although these magnitudes [taken here as the flux within 2RP, with the inverted Petrosian...
Total galaxy magnitudes and effective radii from Petrosian magnitudes and radii (2005)
Graham, Alister W., Driver, Simon P., Petrosian, Vahé, Conselice, Christopher J., Bershady, Matthew A., Crawford, Steven M., ...
Abstract not available.
Total galaxy magnitudes and effective radii from Petrosian magnitudes and radii (2005)
Graham, Alister W., Driver, Simon P., Petrosian, Vahé, Conselice, Christopher J., Bershady, Matthew A., Crawford, Steven M., ...
Abstract not available.
Total galaxy magnitudes and effective radii from Petrosian magnitudes and radii (2005)
Graham, Alister W., Driver, Simon P., Petrosian, Vahe, Conselice, Christopher J., Bershady, Matthew A., Crawford, Steven M., ...
Petrosian magnitudes were designed to help with the difficult task of determining a galaxy's total light. Although these magnitudes [taken here as the flux within 2RP, with the inverted Petrosian...
Internal Kinematics of Luminous Compact Blue Galaxies (2004)
Bershady, Matthew A., Vils, M., Hoyos, C., Guzman, R., Koo, D. C.
We describe the dynamical properties which may be inferred from HST/STIS spectroscopic observations of luminous compact blue galaxies (LCBGs) between 0.1
Bershady, Matthew A., Andersen, David R., Verheijen, Marc A. W., Westfall, Kyle B., Crawford, Steven M., Swaters, Rob A.
We present a performance analysis of SparsePak and the WIYN Bench Spectrograph for precision studies of stellar and ionized gas kinematics of external galaxies. We focus on spectrograph...
Galaxy Kinematics with SALT (2004)
Bershady, Matthew A., Verheijen, Marc A. W., Andersen, David R., Swaters, Rob A., Westfall, Kyle B.
The combination of dynamical and photometric properties of galaxies offers a largely un-tapped source of information on how galaxies assembled and where stars formed. Bi-dimensional kinematic...
Bershady, Matthew A., Andersen, David R., Harker, Justin, Ramsey, Larry W., Verheijen, Marc A. W.
We describe the design and construction of a formatted fiber field-unit, SparsePak, and characterize its optical and astrometric performance. This array is optimized for spectroscopy of low-surface...
A Direct Measurement of Major Galaxy Mergers at z < 3 (2003)
Conselice, Christopher J., Bershady, Matthew A., Dickinson, Mark, Papovich, Casey
This paper presents direct evidence for hierarchical galaxy assembly out to redshifts z ~ 3. We identify major mergers using the model-independent CAS (concentration, asymmetry, clumpiness) physical...
The Tully-Fisher Relation of Barred Galaxies (2003)
Courteau, Stephane, Andersen, David R., Bershady, Matthew A., MacArthur, Lauren A., Rix, Hans-Walter
We present new data exploring the scaling relations, such as the Tully-Fisher relation (TFR), of bright barred and unbarred galaxies. A primary motivation for this study is to establish whether...
The Tully-Fisher Relation of barred galaxies (2003)
Courteau, Stéphane, Andersen, David R., Bershady, Matthew A., MacArthur, Lauren A., Rix, Hans-Walter
We present new data exploring the scaling relations, such as the Tully-Fisher relation (TFR), of bright barred and unbarred galaxies. A primary motivation for this study is to establish whether...
The Intrinsic Ellipticity of Spiral Disks (2002)
Andersen, David R., Bershady, Matthew A.
We have measured the distribution of intrinsic ellipticities for a sample of 28 relatively face-on spiral disks. We combine H-alpha velocity fields and R and I-band images to determine differences...
Pisano, D. J., Kobulnicky, Henry A., Guzman, Rafael, Gallego, Jesus, Bershady, Matthew A.
We present Arecibo 21 cm spectroscopy, Keck HIRES Hb spectroscopy, and WIYN R-band images of 11 nearby blue compact galaxies selected to be similar to blue compact star-forming galaxies at...
The Measurement of Disk Ellipticity in Nearby Spiral Galaxies (2001)
Andersen, David R., Bershady, Matthew A., Sparke, Linda S., Gallagher, John S., Wilcots, Eric M.
We have measured the intrinsic disk ellipticity for 7 nearby, nearly face-on spiral galaxies by combining Densepak integral-field spectroscopy with I-band imaging from the WIYN telescope. Initially...
H-alpha Imaging with HST+NICMOS of An Elusive Damped Ly-alpha Cloud at z=0.6 (2000)
Bouche, Nicolas, Lowenthal, James D., Charlton, Jane C., Bershady, Matthew A., Churchill, Christopher W., Steidel, Charles C.
Despite previous intensive ground-based imaging and spectroscopic campaigns and wide-band HST imaging of the z=0.927 QSO 3C336 field, the galaxy that hosts the damped Ly-alpha system along this...
Bershady, Matthew A., Jangren, Anna, Conselice, Christopher J.
In this paper we define an observationally robust, multi-parameter space for the classification of nearby and distant galaxies. The parameters include luminosity, color, and the image-structure...
The Evolution of Spiral Disks (1999)
Bershady, Matthew A., Andersen, David R.
We report on aspects of an observational study to probe the mass assembly of large galaxy disks. In this contribution we focus on a new survey of integral-field H-alpha velocity-maps of nearby, face...
Galaxy Form and Spectral-Type: A Physical Framework for Measuring Evolution (1999)
I outline a quantitative method for characterizing galaxies both by photometric `form' and indices of spectral-type, applicable to both nearby and distant galaxies. Such a characterization provides...
The Unusual Infrared Object HDF-N J123656.3+621322 (1999)
Dickinson, Mark, Hanley, Christopher, Elston, Richard, Eisenhardt, Peter R., Stanford, S. A., Adelberger, Kurt L., ...
We describe an object in the Hubble Deep Field North with very unusual near-infrared properties. It is readily visible in Hubble Space Telescope NICMOS images at 1.6um and from the ground at 2.2um,...
The Asymmetry of Galaxies: Physical Morphology for Nearby and High Redshift Galaxies (1999)
Conselice, Christopher J., Bershady, Matthew A., Jangren, Anna
We present a detailed study of rotational asymmetry in galaxies for both morphological and physical diagnostic purposes. An unambiguous method for computing asymmetry is developed, robust for both...
Bershady, Matthew A., Charlton, Jane C., Geoffroy, Janet M.
We model, via Monte Carlo simulations, the distribution of observed U-B, B-V, V-I galaxy colors in the range 1.753 galaxy luminosity function from color-selected samples is to measure the (observed)...
The Symmetry, Color and Morphology of Galaxies in the Hubble Deep Field (1998)
Conselice, Christopher J., Bershady, Matthew A.
We present a new method of utilizing the color and asymmetry values for galaxies in the Hubble Deep Field to determine both their morphological features and physical parameters. By using a...
Surface Brightness of Starbursts at Low and High Redshifts (1998)
Weedman, Daniel W., Wolovitz, Jeffrey B., Bershady, Matthew A., Schneider, Donald P.
Observations in the rest frame ultraviolet from various space missions are used to define the nearby starburst regions having the highest surface brightness on scales of several hundred pc. The...
Near-Infrared Galaxy Counts to J and K ~ 24 as a Function of Image Size (1998)
Bershady, Matthew A., Lowenthal, James D., Koo, David C.
We have used the Keck 10m telescope to count objects as a function of image size in 2 high galactic latitude fields covering 1.5 arcmin^2 and reaching 50% completeness at K=24 and J=24.5 for stellar...
Variable Extended Objects in SA 57 (1997)
Bershady, Matthew A., Trevese, Dario, Kron, Richard G.
We have isolated a sample of 14 candidate variable objects with extended image structure to Bj = 22.5 in 0.284 deg^2 of Selected Area 57. The majority of candidates are blue (U-B -23, and 162/deg^2...
The Luminosity Function for L>L* Galaxies at z > 3 (1997)
Bershady, Matthew A., Majewski, Steven R., Koo, David C., Kron, Richard G., Munn, Jeffrey A.
Through use of multiband (U, B, R, I) photometry we have isolated high redshift (3.0
Towards More Precise Photometric Redshifts: Calibration Via CCD Photometry (1997)
Brunner, Robert J., Connolly, Andrew J., Szalay, Alexander S., Bershady, Matthew A.
We present the initial results from a deep, multi-band photometric survey of selected high Galactic latitude redshift fields. Previous work using the photographic data of Koo and Kron demonstrated...
The Tully-Fisher Relation at Intermediate Redshifts (1996)
Motivated by recent pioneering measurements of galaxy kinematics at intermediate redshifts, we have begun a pilot survey to measure rotation curves for blue, star-forming galaxies between 0.05
Spatially Resolved Kinematics of Distant Galaxies (1996)
A Tully-Fisher (TF) relation from H-alpha rotation curves of 19 luminous, star-forming galaxies reveals there is little evidence for evolution in the mass-to-light ratio (M/L) of these galaxies to...
Linear Regression for Astronomical Data with Measurement Errors and Intrinsic Scatter (1996)
Akritas, Michael G., Bershady, Matthew A.
Two new methods are proposed for linear regression analysis for data with measurement errors. Both methods are designed to accommodate intrinsic scatter in addition to measurement errors. The first...
Griffiths, Richard, Ratnatunga, Kavan U., Neuschaefer, Lyman W., Casertano, Stefano, Im, Myungshin, Wyckoff, Eric W., ...
We present results from the Medium Deep Survey (MDS), a Key Project using the Hubble Space Telescope. Wide Field Camera images of random fields have been taken in "parallel mode" with an effective...
Griffiths, Richard, Ratnatunga, Kavan U., Neuschaefer, Lyman W., Casertano, Stefano, Im, Myungshin, Wyckoff, Eric W., ...
We present results from the Medium Deep Survey (MDS), a Key Project using the Hubble Space Telescope. Wide Field Camera images of random fields have been taken in "parallel mode" with an effective...