Marc Postman
A5057994016- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Adaptive optics and wavefront sensing
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Scientific Research and Discoveries
- CCD and CMOS Imaging Sensors
- Planetary Science and Exploration
- Cosmology and Gravitation Theories
- Photocathodes and Microchannel Plates
- History and Developments in Astronomy
- Calibration and Measurement Techniques
- Astro and Planetary Science
- Spacecraft Design and Technology
- Satellite Image Processing and Photogrammetry
- Radio Astronomy Observations and Technology
- Remote Sensing in Agriculture
- Dark Matter and Cosmic Phenomena
- Infrared Target Detection Methodologies
- Space Exploration and Technology
- Optical Systems and Laser Technology
Space Telescope Science Institute
2015-2024
Michigan Science Center
1996-2021
California Institute of Technology
2021
IIT@Harvard
2010
Pennsylvania State University
2010
Minnesota State Colleges and Universities System
2010
Johns Hopkins University
1994-2006
Association of Universities For Research In Astronomy
1998-2002
Kitt Peak National Observatory
1998-2002
National Aeronautics and Space Administration
1998-2001
We present Advanced Camera for Surveys, NICMOS, and Keck adaptive-optics-assisted photometry of 20 Type Ia supernovae (SNe Ia) from the Hubble Space Telescope (HST) Cluster Supernova Survey. The SNe were discovered over redshift interval 0.623 < z 1.415. Of these Ia, 14 pass our strict selection cuts are used in combination with world's sample to derive best current constraints on dark energy. new 10 beyond = 1, thereby nearly doubling statistical weight HST-discovered this redshift. Our...
The Hubble Deep Field (HDF) is a Director's Discretionary program on HST in Cycle 5 to image an undistinguished field at high Galactic latitude four passbands as deeply reasonably possible. These images provide the most detailed view date of distant galaxies and are likely be important for wide range studies galaxy evolution cosmology. In order optimize observing time available, northern continuous viewing zone was selected were taken ten consecutive days, or approximately 150 orbits....
We describe the target selection and resulting properties of a spectroscopic sample luminous red galaxies (LRGs) from imaging data Sloan Digital Sky Survey (SDSS). These are selected on basis color magnitude to yield intrinsically that extends fainter farther than main flux-limited portion SDSS galaxy sample. The is designed impose passively evolving luminosity rest-frame cut redshift 0.38. Additional, yet more included ∼0.5. Approximately 12 these per square degree targeted for...
The Cluster Lensing And Supernova survey with Hubble (CLASH) is a 524-orbit multi-cycle treasury program to use the gravitational lensing properties of 25 galaxy clusters accurately constrain their mass distributions. survey, described in detail this paper, will definitively establish degree concentration dark matter cluster cores, key prediction CDM. CLASH sample larger and less biased than current samples space-based imaging studies similar depth, as we have minimized lensing-based...
In the course of its commissioning observations, Sloan Digital Sky Survey (SDSS) has produced one largest redshift samples galaxies selected from CCD images. Using 11,275 complete to r* = 17.6 over 140 deg2, we compute luminosity function in band a range -23 < M -16 (for h 1). The result is well-described by Schechter with parameters ϕ* (1.46 ± 0.12) × 10-2 h3 Mpc-3, M* -20.83 0.03, and α -1.20 0.03. implied density j ≈ (2.6 0.3) 108h L⊙ Mpc-3. We find that surface brightness selection...
view Abstract Citations (689) References (22) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The morphology-density relation - group connection. Postman, M. ; Geller, J. relationship between galaxy morphology and local density is derived from two complete redshift surveys. This completely consistent with the one by Dressler for a sample of 55 rich clusters. apparently universal extends over six orders magnitude in space density. There no dependence on...
We measure the morphology--density relation (MDR) and morphology-radius (MRR) for galaxies in seven z ~ 1 clusters that have been observed with Advanced Camera Surveys on board Hubble Space Telescope. Simulations independent comparisons of ourvisually derived morphologies indicate ACS allows one to distinguish between E, S0, spiral down zmag = 24, corresponding L/L* 0.21 0.30 at 0.83 1.24, respectively. adopt density radius estimation methods match those used lower redshift order study...
We present a candidate for the most distant galaxy known to date with photometric redshift of z = 10.7+0.6−0.4 (95% confidence limits; < 9.5 galaxies types ruled out at 7.2σ). This J-dropout Lyman break galaxy, named MACS0647-JD, was discovered as part Cluster Lensing and Supernova survey Hubble (CLASH). observe three magnified images this due strong gravitational lensing by cluster MACSJ0647.7+7015 0.591. The are factors ∼80, 7, 2, brighter two observed ∼26th magnitude AB (∼0.15 μJy) in...
Black hole masses predicted from the Mbh-sigma relationship conflict with those Mbh-L for most luminous galaxies, such as brightest cluster galaxies (BCGs). This is because stellar velocity dispersion, sigma, increases only weakly L BCGs and other giant ellipticals. The predicts that may have Mbh approaching 10^{10}M_sol, while M-sigma always Mbh<3X10^9M_sol. We argue a plausible or even preferred description of similar luminosity. If cores in central density are formed by binary BHs, then...
This paper describes the organization of database and catalog data products from Pan-STARRS1 $3\pi$ Steradian Survey. The are available in form an SQL-based relational MAST, Mikulski Archive for Space Telescopes at STScI. is described detail, including construction database, provenance data, schema, how tables related. Examples queries a range science goals included.
We present a joint shear-and-magnification weak-lensing analysis of sample 16 X-ray-regular and 4 high-magnification galaxy clusters at 0.19 ≲ z 0.69 selected from the Cluster Lensing And Supernova survey with Hubble (CLASH). Our uses wide-field multi-color imaging, taken primarily Suprime-Cam on Subaru Telescope. From stacked-shear-only X-ray-selected subsample, we detect ensemble-averaged lensing signal total signal-to-noise ratio ≃ 25 in radial range 200–3500 kpc h−1, providing integrated...
Growing observational evidence now indicates that nebular line emission has a significant impact on the rest-frame optical fluxes of z~5-7 galaxies observed with Spitzer. This makes appear more massive, lower specific star formation rates. However, corrections for this have been very difficult to perform reliably due huge uncertainties overall strength such at z>~5.5. Here, we present most direct yet ubiquitous high-EW [OIII]+Hbeta in Lyman-break z~7, while also presenting strategy an...
In 1964, Refsdal hypothesized that a supernova whose light traversed multiple paths around strong gravitational lens could be used to measure the rate of cosmic expansion. We report discovery such system. Hubble Space Telescope imaging, we have found four images single forming an Einstein cross configuration redshift z=0.54 elliptical galaxy in MACS J1149.6+2223 cluster. The cluster's potential also creates z=1.49 spiral host galaxy, and future appearance elsewhere cluster field is expected....
We present an analysis of 15 Type Ia supernovae (SNe Ia) at redshift z > 1 (9 1.5 < 2.3) recently discovered in the CANDELS and CLASH Multi-Cycle Treasury programs using WFC3 on Hubble Space Telescope. combine these SNe with a new compilation 1050 Ia, jointly calibrated corrected for simulated survey biases to produce accurate distance measurements. unbiased constraints expansion rate six redshifts range 0.07 based only this combined SN sample. The added leverage our sample leads factor ~3...
The Wide Field Infrared Survey Telescope (WFIRST) is a 2.4m space telescope with 0.281 deg^2 field of view for near-IR imaging and slitless spectroscopy coronagraph designed > 10^8 starlight suppresion. As background information Astro2020 white papers, this article summarizes the current design anticipated performance WFIRST. While WFIRST does not have UV imaging/spectroscopic capabilities Hubble Space Telescope, wide surveys hundreds times more efficient. Some most ambitious multi-cycle...
The gravitationally lensed supernova Refsdal appeared in multiple images produced through gravitational lensing by a massive foreground galaxy cluster. After the 2014, lens models of cluster predicted that an additional image would appear 2015, which was subsequently observed. We use time delays between to perform blinded measurement expansion rate Universe, quantified Hubble constant (
Abstract We present JWST/NIRSpec prism spectroscopy of MACS0647−JD, a triply lensed z ∼ 11 candidate discovered in Hubble Space Telescope imaging and spatially resolved by JWST into two components, A B. Spectroscopy component yields spectroscopic redshift = 10.17 based on seven detected emission lines: C iii ] λ 1907, 1909, [O ii 3727, [Ne 3869, 3968, H δ 4101, γ 4340, 4363. These are the second-most distant detections these lines to date, galaxy observed just 460 million years after Big...
We analyze deep multicolor Advanced Camera images of the largest known gravitational lens, A1689. Radial and tangential arcs delineate critical curves in unprecedented detail, many small counterimages are found near center mass. construct a flexible light deflection field to predict appearance positions counterimages. The model is refined as new identified incorporated improve model, yielding total 106 30 multiply lensed background galaxies, spanning wide redshift range, 1.0 < z 5.5....
We present an optical/near IR selected catalog of 79 clusters distributed over area 5.1~square~degrees. The was constructed from images obtained with the 4-Shooter CCD mosaic camera on Hale 5m telescope operating in ``scan" mode. survey, hereafter known as Palomar Distant Cluster Survey (PDCS), conducted two broad band filters that closely resemble~$V$ and~$I$. $4σ$ limiting magnitudes for our 300 s exposures are~$\sim$~23.8~($V$) and~22.5~($I$). A matched filter algorithm developed and...
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view Abstract Citations (248) References (37) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Brightest Cluster Galaxies as Standard Candles Postman, Marc ; Lauer, Tod R. We investigate the use of brightest cluster galaxies (BCGs) standard candles for measuring galaxy peculiar velocities on large scales. have obtained precise large-format CCD surface photometry and redshifts an all-sky, volume-limited (z <= 0.05) sample 119 BCG. reinvestigate Hoessel (1980)...
We present the C4 Cluster Catalog, a new sample of 748 clusters galaxies identified in spectroscopic Second Data Release (DR2) Sloan Digital Sky Survey (SDSS). The cluster-finding algorithm identifies as overdensities seven-dimensional position and color space, thus minimizing projection effects that have plagued previous optical cluster selection. catalog covers ∼2600 deg2 sky ranges redshift from z = 0.02 to 0.17. mean membership is 36 (with measured redshifts) brighter than r 17.7, but...
We investigate the color-magnitude (CM) relation of galaxies in distant X-ray-selected cluster RDCS 1252.9-2927 at z = 1.24 using images obtained with Advanced Camera for Surveys on Hubble Space Telescope F775W and F850LP bandpasses. select based morphological classifications extending about 3.5 mag down galaxy luminosity function, augmented by spectroscopic membership information. At core is an extensive early-type population surrounding a central pair that show signs dynamical interaction....