scholarly journals Disk and Bulge Morphology of WFPC2 Galaxies: The [ITAL]HUBBLE SPACE TELESCOPE[/ITAL] Medium Deep Survey Database

1999 ◽  
Vol 118 (1) ◽  
pp. 86-107 ◽  
Author(s):  
Kavan U. Ratnatunga ◽  
Richard E. Griffiths ◽  
Eric J. Ostrander
Keyword(s):  
Hubble Space Telescope ◽  
Space Telescope ◽  
Deep Survey

The Hubble Space Telescope Medium Deep Survey with the Wide Field and Planetary Camera. 1: Methodology and results on the field near 3C 273

1994 ◽  
Vol 437 ◽  
pp. 67 ◽  
Author(s):  
R. E. Griffiths ◽  
K. U. Ratnatunga ◽  
L. W. Neuschaefer ◽  
S. Casertano ◽  
M. Im ◽  
...  
Keyword(s):  
Hubble Space Telescope ◽  
Wide Field ◽  
Space Telescope ◽  
Deep Survey

scholarly journals Outside the Lyman-break box: detecting Lyman continuum emitters at 3.5 < z < 5.1 with CLAUDS

2020 ◽  
Vol 494 (4) ◽  
pp. 4986-5007 ◽  
Author(s):  
U Meštrić ◽  
E V Ryan-Weber ◽  
J Cooke ◽  
R Bassett ◽  
M Sawicki ◽  
...  
Keyword(s):  
Intergalactic Medium ◽  
Hubble Space Telescope ◽  
High Redshift ◽  
Large Area ◽  
Redshift Range ◽  
Space Telescope ◽  
High Redshift Galaxies ◽  
Lyman Continuum ◽  
Deep Survey ◽  
Individual Galaxies

ABSTRACT Identifying non-contaminated sample of high-redshift galaxies with escaping Lyman continuum (LyC) flux is important for understanding the sources and evolution of cosmic reionization. We present CLAUDS (CFHT Large Area u-band deep survey) u-band photometry of the COSMOS field to probe LyC radiation from spectroscopically confirmed galaxies at $z$ ≥ 3.5 and outside the standard Lyman-break galaxy colour-selection expectations. Complementary to the CLAUDS data, we use Subaru multifilter photometry, Hubble Space Telescope (HST) multifilter imaging, and the spectroscopic surveys D10K, VUDS, and 3D-HST. We present a sample of Lyman continuum galaxy (LCG) candidates in the redshift range 3.5 ≲ $z$ ≲ 5.1. Here, we introduce 5 LCG candidates, where two are flagged quality 1 and three quality 2. The estimated $f_{\rm esc}^{\rm abs}$ for quality 1 candidates are in the range $\sim 5 - 73{{\ \rm per\ cent}}$ and $\sim 30 - 93{{\ \rm per\ cent}}$. These estimates are based on our derived parameters from individual galaxies as inputs to a range of BPASS models as well as mean intergalactic medium (IGM) and maximal intergalactic and circumgalactic media (IGM+CGM) transmission. We conclude that our search for LCGs is most likely biased to lines of sight with low H i densities or free from Lyman limit systems. Our two best LCG candidates have EW (Lyα) ≤ 50 Å and we find no correlation or anticorrelation between EW (Lyα), $f_{\rm esc}^{\rm abs}$, and Robs, the ratio of ionizing to non-ionizing observed flux in the measured passbands. Stacking candidates without solid LyC detections (S/N &lt; 3) results in an estimated $f_{\rm esc}^{\rm abs}$ from galaxies not greater than $1{{\ \rm per\ cent}}$.

Galaxy Clustering Statistics of Hubble Space Telescope Medium Deep Survey WF/PC Images

1995 ◽  
Vol 453 ◽  
pp. 559 ◽  
Author(s):  
L. W. Neuschaefer ◽  
K. U. Ratnatunga ◽  
R. E. Griffiths ◽  
S. Casertano ◽  
M. Im
Keyword(s):  
Hubble Space Telescope ◽  
Galaxy Clustering ◽  
Space Telescope ◽  
Deep Survey

Cosmic Gravitational Shear from the Hubble Space Telescope Medium Deep Survey

2003 ◽  
Vol 598 (2) ◽  
pp. L71-L74 ◽  
Author(s):  
Stefano Casertano ◽  
Kavan U. Ratnatunga ◽  
Richard E. Griffiths
Keyword(s):  
Hubble Space Telescope ◽  
Space Telescope ◽  
Deep Survey

Structure and photometry of an I less than 20.5 galaxy sample from the Hubble Space Telescope medium deep survey

1995 ◽  
Vol 444 ◽  
pp. 21 ◽  
Author(s):  
Andrew C. Phillips ◽  
Matthew A. Bershady ◽  
Duncan A. Forbes ◽  
David C. Koo ◽  
Garth D. Illingworth ◽  
...  
Keyword(s):  
Hubble Space Telescope ◽  
Space Telescope ◽  
Deep Survey ◽  
Galaxy Sample

Structural Parameters of Faint Galaxies from Prerefurbishment Hubble Space Telescope Medium Deep Survey Observations

1995 ◽  
Vol 453 ◽  
pp. 599 ◽  
Author(s):  
S. Casertano ◽  
K. U. Ratnatunga ◽  
R. E. Griffiths ◽  
M. Im ◽  
L. W. Neuschaefer ◽  
...  
Keyword(s):  
Hubble Space Telescope ◽  
Structural Parameters ◽  
Space Telescope ◽  
Deep Survey

Hubble Space Telescope Medium Deep Survey. 2: Deconvolution of Wide Field Camera field galaxy images in the 13 hour + 43 deg field

1994 ◽  
Vol 107 ◽  
pp. 930 ◽  
Author(s):  
R. A. Windhorst ◽  
P. C. Schmidtke ◽  
S. M. Pascarelle ◽  
J. M. Gordon ◽  
R. E. Griffitis ◽  
...  
Keyword(s):  
Hubble Space Telescope ◽  
Wide Field ◽  
Space Telescope ◽  
Deep Survey ◽  
Field Galaxy

scholarly journals New “Einstein Cross” Gravitational Lens Candidates In HST WFPC2 Survey Images

1996 ◽  
Vol 173 ◽  
pp. 323-328 ◽  
Author(s):  
K.U. Ratnatunga ◽  
E.J. Ostrander ◽  
R.E. Griffiths ◽  
M. Im
Keyword(s):  
High Resolution ◽  
Hubble Space Telescope ◽  
Elliptical Galaxy ◽  
Broad Band ◽  
Gravitational Lens ◽  
Space Telescope ◽  
Symmetric Configuration ◽  
Band Filter ◽  
Deep Survey ◽  
Random Survey

We report the serendipitous discovery of quadruple gravitational lens candidates using the Hubble Space Telescope. We have so far discovered two good examples of such lenses, each in the form of four faint blue images located in a symmetric configuration around a red elliptical galaxy. The high resolution of HST has facilitated the discovery of this optically selected sample of faint lenses with small (∼1″) separations between the (I∼ 25–27) lensed components and the much brighter (I∼ 19–22) lensing galaxies. The sample has been discovered in the routine processing of HST fields through the Medium Deep Survey pipeline, which fits simple galaxy models to broad band filter images of all objects detected in random survey fields using WFPC2.

The Top 10 List of Gravitational Lens Candidates from the [ITAL]HUBBLE SPACE TELESCOPE[/ITAL] Medium Deep Survey

1999 ◽  
Vol 117 (5) ◽  
pp. 2010-2023 ◽  
Author(s):  
Kavan U. Ratnatunga ◽  
Richard E. Griffiths ◽  
Eric J. Ostrander
Keyword(s):  
Hubble Space Telescope ◽  
Gravitational Lens ◽  
Space Telescope ◽  
Deep Survey
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