Puragra Guhathakurta | University of California, Santa Cruz (original) (raw)

Uploads

Papers by Puragra Guhathakurta

Research paper thumbnail of Deep Optical Imaging of the Bright Seyfert Galaxy NGC 5548: A Long, Very Low Surface Brightness Tail

Astronomical Journal, 1998

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Deep Optical Imaging of the Bright Seyfert Galaxy NGC 5548: A Long, Very Low Surface Brightness Tail

Astronomical Journal, 1998

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A unique isolated dwarf spheroidal galaxy at D = 1.9 Mpc

Monthly Notices of the Royal Astronomical Society, 2012

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The DEEP2 Galaxy Redshift Survey: Clustering of Galaxies as a Function of Luminosity at z = 1

The Astrophysical Journal, 2006

Page 1. THE DEEP2 GALAXY REDSHIFT SURVEY: CLUSTERING OF GALAXIES AS A FUNCTION OF LUMINOSITY AT z... more Page 1. THE DEEP2 GALAXY REDSHIFT SURVEY: CLUSTERING OF GALAXIES AS A FUNCTION OF LUMINOSITY AT z = 1 Alison L. Coil, 1,2 Jeffrey A. Newman, 1,3 Michael C. Cooper, 4 Marc Davis, 4 SM Faber, 5 David ...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of THE UNIVERSAL STELLAR MASS-STELLAR METALLICITY RELATION FOR DWARF GALAXIES

The Astrophysical Journal, 2013

Bookmarks Related papers MentionsView impact

Research paper thumbnail of THE SPLASH SURVEY: SPECTROSCOPY OF 15 M31 DWARF SPHEROIDAL SATELLITE GALAXIES

The Astrophysical Journal, 2012

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Galactic dynamics and local dark matter

Bookmarks Related papers MentionsView impact

Research paper thumbnail of M31 Dwarf Galaxy Dark Matter Halos

We marginalize over solutions to the spherical Jeans equation to obtain mass profiles for five An... more We marginalize over solutions to the spherical Jeans equation to obtain mass profiles for five Andromeda dwarf spheroidals (dSphs). We analyze stellar kinematics of And I, II, III, X, and XIV, obtained from Keck/DEIMOS spectroscopy, and we compare the mass within 300 parsecs to the Milky Way dSphs.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The SPLASH Survey: Spectroscopy of Newly Discovered Tidal Streams in the Outer Halo of the Andromeda Galaxy

We present Keck DEIMOS spectra of stars associated with three newly discovered tidal streams in t... more We present Keck DEIMOS spectra of stars associated with three newly discovered tidal streams in the remote outer halo of the Andromeda spiral galaxy (M31). Two of these streams, Streams E and F (at Rproj 60 and 100 kpc, respectively, on the NW minor axis), were discovered by members of our collaboration in a deep, wide-field Subaru SuprimeCam imaging survey.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Galactic Dynamics and Local Dark Matter

The concordance Lambda Cold Dark Matter (Lambda-CDM) model for the formation of structure in the ... more The concordance Lambda Cold Dark Matter (Lambda-CDM) model for the formation of structure in the Universe, while remarkably successful at describing observations of structure on large scales, continues to be challenged by observations on galactic scales. Fortunately, CDM models and their various proposed alternatives make a rich variety of testable predictions that make the Local Group and our own Milky

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The Surface Brightness Profile of the Bulge and Halo of the Andromeda Spiral Galaxy (M31) from R = 10 to 165 kiloparsecs

Understanding the formation of galaxies and their structural subcomponents is a key goal of moder... more Understanding the formation of galaxies and their structural subcomponents is a key goal of modern cosmology. Large spiral galaxies like our own consist of a flattened rotating disk, a centrally concentrated bulge whose density decreases exponentially with increasing radius, and an extended halo whose density scales as an inverse power law in radius. Our internal vantage point is disadvantageous for

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The DEEP2 Galaxy Redshift Survey: Evolution of Close Galaxy Pairs and Major-Merger Rates up to z ~ 1.2

Astrophysical Journal, 2004

We derive the close, kinematic pair fraction and merger rate up to redshift z~1.2 from the initia... more We derive the close, kinematic pair fraction and merger rate up to redshift z~1.2 from the initial data of the DEEP2 Redshift Survey. Assuming a mild luminosity evolution, the number of companions per luminous galaxy is found to evolve as (1+z)m, with m=0.51+/-0.28 assuming no evolution, m=1.60+/-0.29. Our results imply that only 9% of present-day L* galaxies have undergone major

Bookmarks Related papers MentionsView impact

Research paper thumbnail of THE LUMINOSITY PROFILE AND STRUCTURAL PARAMETERS OF THE ANDROMEDA GALAXY

The Astrophysical Journal, 2011

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Science objectives and early results of the DEEP2 redshift survey

Proceedings of SPIE - The International Society for Optical Engineering, 2002

Bookmarks Related papers MentionsView impact

Research paper thumbnail of AEGIS: Enhancement of Dust-enshrouded Star Formation in Close Galaxy Pairs and Merging Galaxies up to z ~ 1

The Astrophysical Journal, 2007

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Temperature fluctuations in interstellar grains. I - Computational method and sublimation of small grains

The Astrophysical Journal, 1989

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Observations of the Gas Reservoir around a Star-Forming Galaxy in the Early Universe

The Astrophysical Journal, 2008

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The DEEP2 Galaxy Redshift Survey: Clustering of Galaxies in Early Data

The Astrophysical Journal, 2004

Bookmarks Related papers MentionsView impact

Research paper thumbnail of THE DEEP2 GALAXY REDSHIFT SURVEY: THE VORONOI-DELAUNAY METHOD CATALOG OF GALAXY GROUPS

The Astrophysical Journal, 2012

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Evolution in the Halo Masses of Isolated Galaxies between z ∼ 1 and z ∼ 0: From DEEP2 to SDSS

The Astrophysical Journal, 2007

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Deep Optical Imaging of the Bright Seyfert Galaxy NGC 5548: A Long, Very Low Surface Brightness Tail

Astronomical Journal, 1998

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Deep Optical Imaging of the Bright Seyfert Galaxy NGC 5548: A Long, Very Low Surface Brightness Tail

Astronomical Journal, 1998

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A unique isolated dwarf spheroidal galaxy at D = 1.9 Mpc

Monthly Notices of the Royal Astronomical Society, 2012

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The DEEP2 Galaxy Redshift Survey: Clustering of Galaxies as a Function of Luminosity at z = 1

The Astrophysical Journal, 2006

Page 1. THE DEEP2 GALAXY REDSHIFT SURVEY: CLUSTERING OF GALAXIES AS A FUNCTION OF LUMINOSITY AT z... more Page 1. THE DEEP2 GALAXY REDSHIFT SURVEY: CLUSTERING OF GALAXIES AS A FUNCTION OF LUMINOSITY AT z = 1 Alison L. Coil, 1,2 Jeffrey A. Newman, 1,3 Michael C. Cooper, 4 Marc Davis, 4 SM Faber, 5 David ...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of THE UNIVERSAL STELLAR MASS-STELLAR METALLICITY RELATION FOR DWARF GALAXIES

The Astrophysical Journal, 2013

Bookmarks Related papers MentionsView impact

Research paper thumbnail of THE SPLASH SURVEY: SPECTROSCOPY OF 15 M31 DWARF SPHEROIDAL SATELLITE GALAXIES

The Astrophysical Journal, 2012

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Galactic dynamics and local dark matter

Bookmarks Related papers MentionsView impact

Research paper thumbnail of M31 Dwarf Galaxy Dark Matter Halos

We marginalize over solutions to the spherical Jeans equation to obtain mass profiles for five An... more We marginalize over solutions to the spherical Jeans equation to obtain mass profiles for five Andromeda dwarf spheroidals (dSphs). We analyze stellar kinematics of And I, II, III, X, and XIV, obtained from Keck/DEIMOS spectroscopy, and we compare the mass within 300 parsecs to the Milky Way dSphs.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The SPLASH Survey: Spectroscopy of Newly Discovered Tidal Streams in the Outer Halo of the Andromeda Galaxy

We present Keck DEIMOS spectra of stars associated with three newly discovered tidal streams in t... more We present Keck DEIMOS spectra of stars associated with three newly discovered tidal streams in the remote outer halo of the Andromeda spiral galaxy (M31). Two of these streams, Streams E and F (at Rproj 60 and 100 kpc, respectively, on the NW minor axis), were discovered by members of our collaboration in a deep, wide-field Subaru SuprimeCam imaging survey.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Galactic Dynamics and Local Dark Matter

The concordance Lambda Cold Dark Matter (Lambda-CDM) model for the formation of structure in the ... more The concordance Lambda Cold Dark Matter (Lambda-CDM) model for the formation of structure in the Universe, while remarkably successful at describing observations of structure on large scales, continues to be challenged by observations on galactic scales. Fortunately, CDM models and their various proposed alternatives make a rich variety of testable predictions that make the Local Group and our own Milky

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The Surface Brightness Profile of the Bulge and Halo of the Andromeda Spiral Galaxy (M31) from R = 10 to 165 kiloparsecs

Understanding the formation of galaxies and their structural subcomponents is a key goal of moder... more Understanding the formation of galaxies and their structural subcomponents is a key goal of modern cosmology. Large spiral galaxies like our own consist of a flattened rotating disk, a centrally concentrated bulge whose density decreases exponentially with increasing radius, and an extended halo whose density scales as an inverse power law in radius. Our internal vantage point is disadvantageous for

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The DEEP2 Galaxy Redshift Survey: Evolution of Close Galaxy Pairs and Major-Merger Rates up to z ~ 1.2

Astrophysical Journal, 2004

We derive the close, kinematic pair fraction and merger rate up to redshift z~1.2 from the initia... more We derive the close, kinematic pair fraction and merger rate up to redshift z~1.2 from the initial data of the DEEP2 Redshift Survey. Assuming a mild luminosity evolution, the number of companions per luminous galaxy is found to evolve as (1+z)m, with m=0.51+/-0.28 assuming no evolution, m=1.60+/-0.29. Our results imply that only 9% of present-day L* galaxies have undergone major

Bookmarks Related papers MentionsView impact

Research paper thumbnail of THE LUMINOSITY PROFILE AND STRUCTURAL PARAMETERS OF THE ANDROMEDA GALAXY

The Astrophysical Journal, 2011

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Science objectives and early results of the DEEP2 redshift survey

Proceedings of SPIE - The International Society for Optical Engineering, 2002

Bookmarks Related papers MentionsView impact

Research paper thumbnail of AEGIS: Enhancement of Dust-enshrouded Star Formation in Close Galaxy Pairs and Merging Galaxies up to z ~ 1

The Astrophysical Journal, 2007

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Temperature fluctuations in interstellar grains. I - Computational method and sublimation of small grains

The Astrophysical Journal, 1989

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Observations of the Gas Reservoir around a Star-Forming Galaxy in the Early Universe

The Astrophysical Journal, 2008

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The DEEP2 Galaxy Redshift Survey: Clustering of Galaxies in Early Data

The Astrophysical Journal, 2004

Bookmarks Related papers MentionsView impact

Research paper thumbnail of THE DEEP2 GALAXY REDSHIFT SURVEY: THE VORONOI-DELAUNAY METHOD CATALOG OF GALAXY GROUPS

The Astrophysical Journal, 2012

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Evolution in the Halo Masses of Isolated Galaxies between z ∼ 1 and z ∼ 0: From DEEP2 to SDSS

The Astrophysical Journal, 2007

Bookmarks Related papers MentionsView impact