Harry I. Teplitz
A5023602707- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Adaptive optics and wavefront sensing
- Radio Astronomy Observations and Technology
- CCD and CMOS Imaging Sensors
- Astrophysics and Cosmic Phenomena
- Photocathodes and Microchannel Plates
- Calibration and Measurement Techniques
- Astro and Planetary Science
- Scientific Research and Discoveries
- Spacecraft and Cryogenic Technologies
- Atmospheric Ozone and Climate
- Spectroscopy and Laser Applications
- Planetary Science and Exploration
- Cosmology and Gravitation Theories
- Geophysics and Gravity Measurements
- History and Developments in Astronomy
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
California Institute of Technology
2016-2025
Infrared Processing and Analysis Center
2016-2025
University of Groningen
2021
University of Lisbon
2021
Institute of Astrophysics and Space Sciences
2021
Institut für Palliative Care
2020
University of Toledo
2017
University of Chicago
2017
Kitt Peak National Observatory
2017
Goddard Space Flight Center
1998-2013
The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) is designed to document the first third of galactic evolution, over approximate redshift (z) range 8--1.5. It will image >250,000 distant galaxies using three separate cameras on Hubble Space Telescope, from mid-ultraviolet near-infrared, and find measure Type Ia supernovae at z>1.5 test their accuracy as standardizable candles for cosmology. Five premier multi-wavelength sky regions are selected, each with...
The Infrared Spectrograph (IRS) is one of three science instruments on the Spitzer Space Telescope. IRS comprises four separate spectrograph modules covering wavelength range from 5.3 to 38micron with spectral resolutions, R \~90 and 600, it was optimized take full advantage very low background in space environment. performing at or better than pre-launch predictions. An autonomous target acquisition capability enables locate mid-infrared centroid a source, providing information so that...
We present the deepest 100 to 500 μm far-infrared observations obtained with Herschel Space Observatory as part of GOODS-Herschel key program, and examine infrared (IR) 3–500 spectral energy distributions (SEDs) galaxies at 0 < z 2.5, supplemented by a local reference sample from IRAS, ISO, Spitzer, AKARI data. determine projected star formation densities their radio mid-IR continuum sizes.
Physical dust models are presented for 65 galaxies in SINGS that strongly detected the four IRAC bands and three MIPS bands. For each galaxy we estimate (1) total mass, (2) fraction of mass contributed by PAHs, (3) intensity starlight heating grains. We find spiral have properties resembling local region Milky Way, with similar dust-to-gas ratio PAH abundance. The observed SEDs, including SCUBA photometry, can be reproduced do not require "cold" (T ≲ 10 K) dust. is to dependent on...
The design and development of NIRSPEC, a near-IR echelle spectrograph for the Keck II 10-meter telescope is described. This instrument large, facility-class vacuum-cryogenic spectrometer with resolving power R equals 25,000 0.4 inch slit. It employs diamond-machined metal optics state-of-the-art IR array detectors high throughput, together powerful user-friendly software ease use.
Selection of active galactic nuclei (AGNs) in the infrared facilitates discovery AGNs whose optical emission is extinguished by dust.In this paper, we use Spitzer Space Telescope First Look Survey (FLS) to assess fraction with mid-infrared (MIR) luminosities that are comparable quasars and missed quasar surveys because dust obscuration.We begin using Sloan Digital Sky (SDSS) database identify 54 within 4 deg 2 extragalactic FLS.These occupy a distinct region MIR color space virtue their...
We present deep mid-infrared spectroscopy with the Spitzer Space Telescope of 13 submillimeter galaxies (SMGs) in Great Observatories Origins Deep Survey North (GOODS-N) field. find strong polycyclic aromatic hydrocarbon (PAH) emission all our targets which allows us to measure mid-IR spectroscopic redshifts and place constraints on contribution from star formation active galactic nuclei (AGN) activity emission. In high signal-to-noise ratio composite spectrum SMGs, we that hot dust...
We present spectra taken with the Infrared Spectrograph on Spitzer covering 5-38 micron region of ten Ultraluminous Galaxies (ULIRGs) found in IRAS Bright Galaxy Sample. Among BGS ULIRGs, we find a factor 50 spread rest-frame mid to far-infrared spectral slope. The 9.7 silicate optical depths range from less than 0.4 more 4.2, implying line sight extinctions A(V) ~ 8 - 78 mag. There is evidence for water ice and hydrocarbon absorption C2H2 HCN features four possibly six 10 indicating...
Abstract The Cosmic Evolution Survey (COSMOS) has become a cornerstone of extragalactic astronomy. Since the last public catalog in 2015, wealth new imaging and spectroscopic data have been collected COSMOS field. This paper describes collection, processing, analysis these to produce reference photometric redshift catalog. Source detection multiwavelength photometry are performed for 1.7 million sources across 2 deg field, ∼966,000 which measured with all available broadband using both...
The CatWISE2020 Catalog consists of 1,890,715,640 sources over the entire sky selected from WISE and NEOWISE survey data at 3.4 4.6 $\mu$m (W1 W2) collected 2010 Jan. 7 to 2018 Dec. 13. This dataset adds two years that used for CatWISE Preliminary (Eisenhardt et al., 2020), bringing total six times as many exposures spanning sixteen large a time baseline AllWISE catalog. other major change is detection list was generated using ${\it crowdsource}$ (Schlafly al. 2019), while software AllWISE....
We present photometry and derived redshifts from up to eleven bandpasses for 9927 galaxies in the Hubble Ultra Deep field (UDF), covering an observed wavelength range near-ultraviolet (NUV) near-infrared (NIR) with Space Telescope observations. Our Wide Field Camera 3 (WFC3)/UV F225W, F275W, F336W image mosaics ultra-violet UDF (UVUDF) imaging campaign are newly calibrated correct charge transfer inefficiency, use new dark calibrations minimize background gradients pattern noise. NIR WFC3/IR...
Abstract The origins of Lyman continuum (LyC) photons responsible for the reionization universe are as yet unknown and highly contested. Detecting LyC from Epoch Reionization is not possible due to absorption by intergalactic medium, which has prompted development several indirect diagnostics infer rate at galaxies contribute reionize studying lower-redshift analogs. We present Low-redshift Continuum Survey (LzLCS) comprising measurements made with Hubble Space Telescope Cosmic Origins...
The Lyman continuum (LyC) cannot be observed at the epoch of reionization (z {\gtrsim} 6) due to intergalactic H I absorption. To identify emitters (LCEs) and infer fraction escaping LyC, astronomers have developed various indirect diagnostics LyC escape. Using measurements from Low-redshift Continuum Survey (LzLCS), we present first statistical test these diagnostics. While optical depth indicators based on Lyα, such as peak velocity separation equivalent width, perform well, also find that...
Abstract We introduce the Bias-free Extragalactic Analysis for Cosmic Origins with NIRCam (BEACON) survey, a JWST Cycle 2 program allocated up to 600 pure-parallel hours of observations. BEACON explores high-latitude areas sky JWST/NIRCam over ∼100 independent sight lines, totaling ∼0.3 deg , reaching median F444W depth ≈28.2 AB mag (5 σ ). Based on existing observations in legacy fields, we estimate that will photometrically identify 25–150 galaxies at z > 10 and 500–1000 ∼ 7–10 uniquely...
We present and use new spectra narrow-band images, along with previously published broad-band of stars in the Arches cluster to extract photometry, astrometry, equivalent width, velocity information. The data are interpreted a wind/atmosphere code determine stellar temperatures, luminosities, mass-loss rates, abundances. have doubled number known emission-line stars, we also made first spectroscopic identification main sequence for any population Galactic Center. conclude that most massive...
Using the Spitzer Space Telescope and Very Large Array (VLA), we present first direct evidence that well-known far-infrared/radio correlation is valid to cosmologically significant redshift. We also confirm, with improved statistics compared previous surveys, a similar result for mid-IR/radio correlation. explore dependence of monochromatic q24 q70 on z. The results were obtained by matching sources at 24 70 μm VLA 1.4 GHz microjansky radio First Look Survey (FLS). Spectroscopic redshifts...
We have surveyed a field covering 9.0 deg2 within the NOAO Deep Wide-Field Survey region in Bootes with Multiband Imaging Photometer on Spitzer Space Telescope (SST) to limiting 24 μm flux density of 0.3 mJy. Thirty-one sources from this survey F24 > 0.75 mJy that are optically very faint (R ≳ 24.5 mag) been observed low-resolution modules Infrared Spectrograph SST (IRS). Redshifts derived primarily strong silicate absorption features reported here for 17 these sources; 10 invisible 26 mag),...
The WFC3 Infrared Spectroscopic Parallel Survey uses the Hubble Space Telescope (HST) infrared grism capabilities to obtain slitless spectra of thousands galaxies over a wide redshift range including peak star formation history universe. We select population very strong emission-line with rest-frame equivalent widths (EWs) higher than 200 Å. A total 176 objects are found 0.35 < z 2.3 in 180 arcmin2 area that we have analyzed so far. This consists young and low-mass starbursts high specific...
We present the mid-infrared spectra obtained with Spitzer IRS for 52 sources, selected as infrared luminous, z ≳ 1 candidates in Extragalactic First Look Survey. The sample selection criteria are f24 μm 0.9 mJy, νfν(24 μm)/νfν(8 μm) 3.16, and μm)/νfν(0.7 10. Of spectra, 47 (90%) produced measurable redshifts based solely on mid-IR spectral features, 35/47 (74%) at 1.5 ≲ 3.2. Keck spectroscopy of a subsample (17/47) agrees redshift measurements. observed fall into three categories: (1) 33%...
We examine deep far-UV (1600 Å) imaging of the HDF-N and HUDF to search for leaking Lyman continuum radiation from starburst galaxies at z ~ 1.3. There are 21 (primarily sub-L*) with spectroscopic redshifts between 1.1 < 1.5, none detected in far-UV. fit stellar population templates galaxies' optical/near-infrared SEDs determine age level dust attenuation each individual galaxy, giving a more accurate estimate intrinsic ratio, f1500/f700, allowing conversion f700 relative escape fraction...
We used the Spitzer Infrared Spectrograph (IRS) to study mid-IR properties and investigate energetics of 24 Submillimeter Galaxies (SMGs). This is largest sample SMGs observed with IRS covers full extent radio-identified population in redshift range z ~ 0.65-3.2. observe broad emission features from Polycyclic Aromatic Hydrocarbons (PAHs) more than 80% our sample. find that median spectrum well described by a starburst component an additional power law, Fnu nu^-2, likely representing < 32%...
We present results from near-infrared spectroscopy of 26 emission-line galaxies at z ~ 2 obtained with the FIRE spectrometer on Magellan Baade telescope. The sample was selected WISP survey, which uses grism Hubble Space Telescope Wide Field Camera 3 to detect over 0.3 < 2.3. Our follow-up (R~5000) 1.0-2.5 micron permits detailed measurements physical properties z~2 galaxies. Dust-corrected star formation rates for range ~5-100 M_sun yr-1. derive a median metallicity ~0.45 Z_sun, and...
We have obtained deep Hubble Space Telescope far-UV images of 15 starburst galaxies at z ∼ 1.3 in the GOODS fields to search for escaping Lyman continuum (LyC) photons. These are deepest (mAB = 28.7, 3σ, 1'' diameter) over this large an area (4.83 arcmin2) and provide some best escape fraction constraints any redshift. do not detect individual galaxies, with 3σ limits LyC (∼700 Å) flux 50–149 times fainter (in fν) than rest-frame UV (1500 fluxes. Correcting mean intergalactic medium (IGM)...
We have obtained deep ultraviolet imaging of the lensing cluster A1689 with WFC3/UVIS camera onboard Hubble Space Telescope in F275W (30 orbits) and F336W (4 filters. These images are used to identify z ∼ 2 star-forming galaxies via their Lyman break, same manner that typically selected at ⩾ 3. Because unprecedented depth large magnification provided by cluster, we detect 100× fainter than previous surveys this redshift. After removing all multiple images, 58 our sample range −19.5 < M1500...
Spectroscopic observations of Hα and Hβ emission lines 128 star-forming galaxies in the redshift range 0.75 ⩽ z 1.5 are presented. These data were taken with slitless spectroscopy using G102 G141 grisms Wide-Field-Camera 3 (WFC3) on board Hubble Space Telescope as part WFC3 Infrared Parallel survey. Interstellar dust extinction is measured from stacked spectra that cover Balmer decrement (Hα/Hβ). We present a function luminosity (down to × 1041 erg s−1), galaxy stellar mass (reaching 4 108...