scholarly journals The Galaxy Populations of Clusters at High Redshifts: A “Hubble Atlas”

1996 ◽  
Vol 171 ◽  
pp. 455-455
Author(s):  
S.C. Trager ◽  
S.M. Faber ◽  
A. Dressler ◽  
Keyword(s):  
Galaxy Clusters ◽  
Hubble Space Telescope ◽  
Space Telescope ◽  
The Galaxy ◽  
First Results ◽  
Galaxy Populations

We present first results of a Hubble Space Telescope imaging and a Palomar and Keck Observatories spectroscopy program of distant, rich galaxy clusters in the form of a “Hubble Atlas” of morphological types at z ≥ 0.75. Two clusters from the compilation of Gunn, Hoessel & Oke (1985) have been studied to date, Cl1322+3027 at z ≈ 0.76 and Cl1603+4313 at z ≈ 0.90.

scholarly journals A MULTIBAND STUDY OF THE GALAXY POPULATIONS OF THE FIRST FOUR SUNYAEV-ZEL'DOVICH EFFECT SELECTED GALAXY CLUSTERS

2011 ◽  
Vol 734 (1) ◽  
pp. 3 ◽  
Author(s):  
A. Zenteno ◽  
J. Song ◽  
S. Desai ◽  
R. Armstrong ◽  
J. J. Mohr ◽  
...  
Keyword(s):  
Galaxy Clusters ◽  
The Galaxy ◽  
Sunyaev Zel'dovich Effect ◽  
Galaxy Populations

scholarly journals The Y dwarf population with HST: unlocking the secrets of our coolest neighbours – I. Overview and first astrometric results

2020 ◽  
Vol 501 (1) ◽  
pp. 911-915
Author(s):  
C Fontanive ◽  
L R Bedin ◽  
D C Bardalez Gagliuffi
Keyword(s):  
Proper Motion ◽  
Hubble Space Telescope ◽  
Proper Motions ◽  
Brown Dwarf ◽  
Space Telescope ◽  
First Results

ABSTRACT In this paper, we present our project that aims at determining accurate distances and proper motions for the Y brown dwarf population using the Hubble Space Telescope. We validate the program with our first results, using a single new epoch of observations of the Y0pec dwarf WISE J163940.83−684738.6. These new data allowed us to refine its proper motion and improve the accuracy of its parallax by a factor of three compared to previous determinations, now constrained to ϖ = 211.11 ± 0.56 mas. This newly derived absolute parallax corresponds to a distance of 4.737 ± 0.013 pc, an exquisite and unprecedented precision for faint ultracool Y dwarfs.

Morphological Studies of the Galaxy Populations in Distant “Butcher‐Oemler” Clusters with theHubble Space Telescope. II. AC 103, AC 118, and AC 114 atz= 0.31

1998 ◽  
Vol 497 (1) ◽  
pp. 188-211 ◽  
Author(s):  
Warrick J. Couch ◽  
Amy J. Barger ◽  
Ian Smail ◽  
Richard S. Ellis ◽  
Ray M. Sharples
Keyword(s):  
Space Telescope ◽  
Morphological Studies ◽  
The Galaxy ◽  
Galaxy Populations

scholarly journals The prevalence and physical properties of extremely low-luminosity galaxies in the early universe

2019 ◽  
Vol 15 (S352) ◽  
pp. 19-19
Author(s):  
Rychard Bouwens
Keyword(s):  
Physical Properties ◽  
Galaxy Clusters ◽  
Early Universe ◽  
Gravitational Lensing ◽  
Stellar Population ◽  
Space Telescope ◽  
James Webb Space Telescope ◽  
Luminosity Functions ◽  
The Galaxy ◽  
Stellar Masses

AbstractGravitational lensing from galaxy clusters has great potential for deriving the prevalence and physical properties of ultra-faint galaxies at early times, with recent very impressive results from the Hubble Frontier Fields program. Important issues in deriving the most accurate results are accurate constraints on source sizes and a robust treatment of uncertainties in the magnification models. Using > 3300 z = 2 – 10 galaxies behind the 6 Hubble Frontier Fields clusters and a forwards modeling approach, I describe the efforts of my collaborators and me to map out the galaxy luminosity functions at ∼ − 13 mag from z ∼ 9 to z ∼ 2, i.e, a factor of 1000 below Lå and to the typical luminosity of galaxies suspected to drive cosmic reionization. Additionally, I discuss the constraints we can obtain on the properties of faint sources, in particular their stellar masses, mass-to-light ratios, colors, and stellar population ages. I conclude with a prospective on using cluster lenses to study the distant universe with the James Webb Space Telescope.

scholarly journals First Results from a Panchromatic HST/WFC3 Imaging Study of the Young, Rapidly Evolving Planetary Nebulae NGC 7027 and NGC 6302

Galaxies ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 49
Author(s):  
Joel H. Kastner ◽  
Jesse Bublitz ◽  
Bruce Balick ◽  
Rodolfo Montez ◽  
Adam Frank ◽  
...  
Keyword(s):  
Hubble Space Telescope ◽  
Imaging Study ◽  
Planetary Nebulae ◽  
Wide Field ◽  
Space Telescope ◽  
Near Ir ◽  
Ngc 7027 ◽  
First Results ◽  
Initial Color ◽  
Line Imaging

We present the first results from comprehensive, near-UV-to-near-IR Hubble Space Telescope Wide Field Camera 3 (WFC3) emission-line imaging studies of two young planetary nebulae (PNe), NGC 7027 and NGC 6302. These two objects represent key sources for purposes of understanding PNe shaping processes. Both nebulae feature axisymmetric and point-symmetric (bipolar) structures and, despite hot central stars and high nebular excitation states, both harbor large masses of molecular gas and dust. The sweeping wavelength coverage of our Cycle 27 Hubble Space Telescope (HST)/WFC3 imaging surveys targeting these two rapidly evolving PNe will provide a battery of essential tests for theories describing the structural and chemical evolution of evolved star ejecta. Here, we present initial color overlays for selected images, and we highlight some of the first results gleaned from the surveys.

scholarly journals Probing the faintest galaxy population at the epoch of reionization with gravitational lensing

2019 ◽  
Vol 15 (S352) ◽  
pp. 26-26
Author(s):  
Hakim Atek
Keyword(s):  
Gravitational Lensing ◽  
Hubble Space Telescope ◽  
Space Telescope ◽  
Systematic Uncertainties ◽  
James Webb Space Telescope ◽  
Exciting Opportunity ◽  
Complete Dataset ◽  
Galaxy Populations ◽  
Galaxy Population ◽  
The Universe

AbstractUltra-deep observations of blank fields with the Hubble Space Telescope have made important inroads in characterizing galaxy populations at redshift z = 6 – 10. Gravitational lensing by massive galaxy clusters offers a new route to identify the faintest sources at the epoch of reionization. In particular, thanks to the Hubble Frontier Fields program, we robustly pushed the detection limit down to MAB = − 15 mag at z ∼ 6. I will present the latest results based on the complete dataset of the HFF clusters and parallel fields, and their implications on the ability of galaxies to reionize the Universe. I will also discuss the results of a comprehensive end-to-end modeling effort towards constraining the systematic uncertainties of the lens models, which are currently the last hurdle before extending the UV LF to fainter luminosities. Finally, I will discuss the great discoveries awaiting combination of such cosmic lenses with the upcoming James Webb Space Telescope and the exciting opportunity to probe the turnover of the UV LF, hence the limit of the star formation process at those early epochs.

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