Roberto Abraham

Optical-mechanical operation of the F2T2 Filter: a tunable filter designed to search for First Light (2008)

Mentuch, Erin, Scott, Alan, Abraham, Roberto, Barton, Elizabeth, Bershady, Matthew, Bland-Hawthorn, Joss, ...

The Flamingos-2 Tandem Tunable filter is a tunable, narrow-band filter, consisting of two Fabry-Perot etalons in series, capable of scanning to any wavelength from 0.95 to 1.35 microns with a...

Galaxy Mass Growth in GDDS and SDSS (2008)

Glazebrook, Karl, Mentuch, Erin, McCarthy, Pat, Abraham, Roberto, Baldry, Ivan, Driver, Simon

I present some new results related to our understanding of the masses of galaxies both in the local and high-redshift Universe. At high-redshift new Spitzer data on galaxies in the Gemini Deep Deep...

Gemini Deep Deep Survey VI: Massive Hdelta-strong galaxies at z=1 (2005)

Borgne, Damien Le, Abraham, Roberto, Daniel, Kathryne, McCarthy, Patrick, Glazebrook, Karl, Savaglio, Sandra, ...

We show that there has been a dramatic decline in the abundance of massive galaxies with strong Hdelta stellar absorption lines from z=1.2 to the present. These ``Hdelta-strong'', or HDS, galaxies...

Cosmic Star Formation History to z=1 from a Narrow Emission Line Selected Tunable Filter Survey (2004)

Glazebrook, Karl, Tober, Jeffrey, Thomson, Scott, Bland-Hawthorn, Joss, Abraham, Roberto

We report the results of a deep 3D imaging survey of the Hubble Deep Field North using the Taurus Tunable Filter and the William Herschel Telescope. This survey was designed to search for new line...

The Gemini Deep Deep Survey: III. The abundance of massive galaxies 3-6 billion years after the Big Bang (2004)

Glazebrook, Karl, Abraham, Roberto, McCarthy, Patrick, Savaglio, Sandra, Chen, Hsiao-Wen, Crampton, David, ...

Hierarchical galaxy formation is the model whereby massive galaxies form from an assembly of smaller units. The most massive objects therefore form last. The model succeeds in describing the...

A New Approach to Galaxy Morphology: I. Analysis of the Sloan Digital Sky Survey Early Data Release (2003)

Abraham, Roberto, Bergh, Sidney Van Den, Nair, Preethi

In this paper we present a new statistic for quantifying galaxy morphology based on measurements of the Gini coefficient of galaxy light distributions. This statistic is easy to measure and is...

Clustering of Very Red Galaxies in the Las Campanas IR Survey (2000)

McCarthy, Patrick, Carlberg, Ray, Marzke, Ron, Chen, Hsiao-Wen, Firth, Andrew, McMahon, Richard, ...

We report results from the first 1000 square arc-minutes of the Las Campanas IR survey. We have imaged 1 square degree of high latitude sky in six distinct fields to a 5-sigma H-band depth of 20.5...

Hubble Space Telescope Imaging of the CFRS and LDSS Redshift Surveys. II. Structural Parameters and the Evolution of Disk Galaxies to Z approximately 1 (1998)

Lilly, Simon, Schade, David, Ellis, Richard, Le Fevre, Oliver, Brinchmann, Jarle, Tresse, Laurence, ...

Several aspects of the evolution of star-forming galaxies are studied using measures of the two-dimensional surface brightness profiles extracted from Hubble Space Telescope images of a sample of 341...

Hubble Space Telescope Imaging of the CFRS and LDSS Redshift Surveys. II. Structural Parameters and the Evolution of Disk Galaxies to Z approximately 1 (1998)

Lilly, Simon, Schade, David, Ellis, Richard, Le Fevre, Oliver, Brinchmann, Jarle, Tresse, Laurence, ...

Several aspects of the evolution of star-forming galaxies are studied using measures of the two-dimensional surface brightness profiles extracted from Hubble Space Telescope images of a sample of 341...

Hubble Space Telescope Imaging of the CFRS and LDSS Redshift Surveys. I. Morphological Properties (1998)

Brinchmann, Jarle, Abraham, Roberto, Schade, David, Tresse, Laurence, Ellis, Richard S., Lilly, Simon, ...

We analyze Hubble Space Telescope images of a complete sample of 341 galaxies drawn from the CFRS and LDSS ground-based redshift surveys. In this, the first paper in the series, each galaxy has been...

Hubble Space Telescope Imaging of the CFRS and LDSS Redshift Surveys. I. Morphological Properties (1998)

Brinchmann, Jarle, Abraham, Roberto, Schade, David, Tresse, Laurence, Ellis, Richard S., Lilly, Simon, ...

We analyze Hubble Space Telescope images of a complete sample of 341 galaxies drawn from the CFRS and LDSS ground-based redshift surveys. In this, the first paper in the series, each galaxy has been...

Hubble Space Telescope Imaging of the CFRS and LDSS Redshift Surveys. I. Morphological Properties (1998)

Brinchmann, Jarle, Abraham, Roberto, Schade, David, Tresse, Laurence, Ellis, Richard S., Lilly, Simon, ...

We analyze Hubble Space Telescope images of a complete sample of 341 galaxies drawn from the CFRS and LDSS ground-based redshift surveys. In this, the first paper in the series, each galaxy has been...

Hubble Space Telescope Imaging of the CFRS and LDSS Redshift Surveys. II. Structural Parameters and the Evolution of Disk Galaxies to Z approximately 1 (1998)

Lilly, Simon, Schade, David, Ellis, Richard, Le Fevre, Oliver, Brinchmann, Jarle, Tresse, Laurence, ...

Several aspects of the evolution of star-forming galaxies are studied using measures of the two-dimensional surface brightness profiles extracted from Hubble Space Telescope images of a sample of 341...

Hubble Space Telescope Imaging of the CFRS and LDSS Redshift Surveys. II. Structural Parameters and the Evolution of Disk Galaxies to Z approximately 1 (1998)

Lilly, Simon, Schade, David, Ellis, Richard, Le Fevre, Oliver, Brinchmann, Jarle, Tresse, Laurence, ...

Several aspects of the evolution of star-forming galaxies are studied using measures of the two-dimensional surface brightness profiles extracted from Hubble Space Telescope images of a sample of 341...

Hubble Space Telescope Imaging of the CFRS and LDSS Redshift Surveys. I. Morphological Properties (1998)

Brinchmann, Jarle, Abraham, Roberto, Schade, David, Tresse, Laurence, Ellis, Richard S., Lilly, Simon, ...

We analyze Hubble Space Telescope images of a complete sample of 341 galaxies drawn from the CFRS and LDSS ground-based redshift surveys. In this, the first paper in the series, each galaxy has been...

Hubble Space Telescope Imaging of the CFRS and LDSS Redshift Surveys. I. Morphological Properties (1998)

Brinchmann, Jarle, Abraham, Roberto, Schade, David, Tresse, Laurence, Ellis, Richard S., Lilly, Simon, ...

We analyze Hubble Space Telescope images of a complete sample of 341 galaxies drawn from the CFRS and LDSS ground-based redshift surveys. In this, the first paper in the series, each galaxy has been...

Hubble Space Telescope Imaging of the CFRS and LDSS Redshift Surveys. II. Structural Parameters and the Evolution of Disk Galaxies to Z approximately 1 (1998)

Lilly, Simon, Schade, David, Ellis, Richard, Le Fevre, Oliver, Brinchmann, Jarle, Tresse, Laurence, ...

Several aspects of the evolution of star-forming galaxies are studied using measures of the two-dimensional surface brightness profiles extracted from Hubble Space Telescope images of a sample of 341...

Hubble Space Telescope Imaging of the CFRS and LDSS Redshift Surveys. I. Morphological Properties (1998)

Brinchmann, Jarle, Abraham, Roberto, Schade, David, Tresse, Laurence, Ellis, Richard S., Lilly, Simon, ...

We analyze Hubble Space Telescope images of a complete sample of 341 galaxies drawn from the CFRS and LDSS ground-based redshift surveys. In this, the first paper in the series, each galaxy has been...

Hubble Space Telescope Imaging of the CFRS and LDSS Redshift Surveys. II. Structural Parameters and the Evolution of Disk Galaxies to Z approximately 1 (1998)

Lilly, Simon, Schade, David, Ellis, Richard, Le Fevre, Oliver, Brinchmann, Jarle, Tresse, Laurence, ...

Several aspects of the evolution of star-forming galaxies are studied using measures of the two-dimensional surface brightness profiles extracted from Hubble Space Telescope images of a sample of 341...

Hubble Space Telescope Imaging of the CFRS and LDSS Redshift Surveys. I. Morphological Properties (1998)

Brinchmann, Jarle, Abraham, Roberto, Schade, David, Tresse, Laurence, Ellis, Richard S., Lilly, Simon, ...

We analyze Hubble Space Telescope images of a complete sample of 341 galaxies drawn from the CFRS and LDSS ground-based redshift surveys. In this, the first paper in the series, each galaxy has been...

Hubble Space Telescope Imaging of the CFRS and LDSS Redshift Surveys. II. Structural Parameters and the Evolution of Disk Galaxies to Z approximately 1 (1998)

Lilly, Simon, Schade, David, Ellis, Richard, Le Fevre, Oliver, Brinchmann, Jarle, Tresse, Laurence, ...

Several aspects of the evolution of star-forming galaxies are studied using measures of the two-dimensional surface brightness profiles extracted from Hubble Space Telescope images of a sample of 341...

The physical parameters of the evolving population of faint galaxies (1997)

Glazebrook, Karl, Abraham, Roberto, Santiago, Basilio, Ellis, Richard, Griffiths, Richard

The excess numbers of blue galaxies at faint magnitudes is a subject of much controversy. Recent Hubble Space Telescope results has revealed a plethora of galaxies with peculiar morphologies...

A Morphological Catalog of Galaxies in the Hubble Deep Field (1996)

Bergh, Sidney Van Den, Abraham, Roberto, Tanvir, Richard Ellis Nial, Santiago, Basilio, Glazebrook, Karl

We present a catalog of morphological and color data for galaxies with $I < 25$ mag in the {\em Hubble Deep Field} (Williams et al. 1996). Galaxies have been inspected and (when possible)...