D. F. de Mello
A5047339047- 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
- Adaptive optics and wavefront sensing
- Astrophysical Phenomena and Observations
- CCD and CMOS Imaging Sensors
- Photocathodes and Microchannel Plates
- Radio Astronomy Observations and Technology
- Scientific Research and Discoveries
- History and Developments in Astronomy
- Astrophysics and Cosmic Phenomena
- Calibration and Measurement Techniques
- Black Holes and Theoretical Physics
- Business Strategy and Innovation
- Spectroscopy and Laser Applications
- Impact of Light on Environment and Health
- Hydrocarbon exploration and reservoir analysis
- Dark Matter and Cosmic Phenomena
- Superconducting and THz Device Technology
- Private Equity and Venture Capital
- Geological Studies and Exploration
- Geophysics and Gravity Measurements
Catholic University of America
2011-2024
University of America
2011-2024
Goddard Space Flight Center
2010-2020
Deleted Institution
2005-2018
Johns Hopkins University
2004-2014
Universidad Nacional Autónoma de México
2009
Space Telescope Science Institute
1998-2005
Swedish Institute of Space Physics
2001-2004
Chalmers University of Technology
2001-2004
Astronomy and Space
2003
Starburst99 is a comprehensive set of model predictions for spectrophotometric and related properties galaxies with active star formation. The models are an improved extended version the data previously published by Leitherer & Heckman. We have upgraded our code implementing latest stellar evolution Geneva group atmosphere grid compiled Lejeune et al. Several which were not included in previous publication shown here first time. presented homogeneous way five metallicities between Z = 0.040...
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...
This special issue of the Astrophysical Journal Letters is dedicated to presenting initial results from Great Observatories Origins Deep Survey (GOODS) that are primarily, but not exclusively, based on multiband imaging data obtained with Hubble Space Telescope and Advanced Camera for Surveys (ACS). The survey covers roughly 320 arcmin2 in ACS F435W, F606W, F814W, F850LP bands, divided into two well-studied fields. Existing deep observations Chandra X-Ray Observatory ground-based facilities...
This paper describes the Hubble Space Telescope imaging data products and reduction procedures for Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey (CANDELS). survey is designed to document evolution of galaxies black holes at $z\sim1.5-8$, study Type Ia SNe beyond $z>1.5$. Five premier multi-wavelength sky regions are selected, each with extensive multiwavelength observations. The primary CANDELS consist obtained in Wide Field Camera 3 / infrared channel (WFC3/IR) UVIS channel,...
We use HST/WFC3 imaging from the CANDELS Multicycle Treasury Survey, in conjunction with Sloan Digital Sky to explore evolution of galactic structure for galaxies stellar masses >3e10M_sun z=2.2 present epoch, a time span 10Gyr. relationship between rest-frame optical color, mass, star formation activity and galaxy structure. confirm dramatic increase day number density non-star-forming above 3e10M_sun reported by others. further find that vast majority these quiescent systems have...
We present the multiwavelength - ultraviolet to mid-infrared catalog of UKIDSS Ultra-Deep Survey (UDS) field observed as part Cosmic Assembly Near-infrared Deep Extragalactic Legacy (CANDELS). Based on publicly available data, includes: CANDELS data from Hubble Space Telescope (near-infrared WFC3 F125W and F160W visible ACS F606W F814W data), u-band CFHT/Megacam, B, V, Rc, i' z' band Subaru/Suprime-Cam, Y Ks VLT/HAWK-I, J, H K bands (Data Release 8), Spitzer/IRAC (3.6, 4.5 SEDS, 5.8 8.0um...
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...
We present results from the Hubble Higher z Supernova Search, first space-based open field survey for supernovae (SNe). In cooperation with Great Observatories Origins Deep Survey, we have used Space Telescope Advanced Camera Surveys to cover ~300 arcmin2 in area of Chandra Field South and North on five separate search epochs (separated by ~45 day intervals) a limiting magnitude F850LP ≈ 26. These deep observations allowed us discover 42 SNe redshift range 0.2 < 1.6. As these data span large...
The Hubble Deep Field South (HDF-S) observations targeted a high Galactic latitude field near QSO J2233-606. We present Wide Planetary Camera 2 of the in four wide bandpasses centered at roughly 300, 450, 606, and 814 nm. Observations, data reduction procedures, noise properties final images are discussed detail. A catalog sources is presented, number counts color distributions galaxies compared with new original (HDF-N) that has been constructed an identical manner. two fields qualitatively...
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 identify an abundant population of extreme emission-line galaxies (EELGs) at redshift z ∼ 1.7 in the Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey imaging from Hubble Space Telescope/Wide Field Camera 3 (HST/WFC3). Sixty-nine EELG candidates are selected by large contribution exceptionally bright emission lines to their near-infrared broadband magnitudes. Supported spectroscopic confirmation strong [O iii] lines—with rest-frame equivalent widths ∼1000 Å—in four that have...
We have undertaken an ambitious program to visually classify all galaxies in the five CANDELS fields down H<24.5 involving dedicated efforts of 65 individual classifiers. Once completed, we expect detailed morphological classifications for over 50,000 up z<4 fields. Here, present our visual classification scheme, which was designed cover a wide range science goals. This scheme includes basic Hubble sequence types, but also look at mergers and interactions, clumpiness galaxies,...
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)...
In this paper we present a detailed study of the structures and morphologies sample 1188 massive galaxies with M* ≥ 1010 M⊙ between redshifts z = 1 3 within Ultra Deep Survey (UDS) region Cosmic Assembly Near-infrared Extragalactic Legacy (CANDELS) field. Using determine how galaxy structure morphology evolve time, investigate nature at high redshift. We visually classify our into discs, ellipticals peculiar systems correct for redshift effects on these classifications through simulations....
Narrow-band imaging of the rest-frame Lyman continuum (LyC) galaxies at z~3.1 has produced a large number candidate LyC-emitting galaxies. These samples are contaminated by lower redshift. To better understand LyC escape, we need an uncontaminated sample that emit strongly in LyC. Here present deep Hubble five bright had previously been identified as LyC-emitters with ground-based images. The WFC3 F336W images probe z>3.06 and provide order-of-magnitude increase spatial resolution over...
Studying giant star-forming clumps in distant galaxies is important to understand galaxy formation and evolution. At present, however, observers theorists have not reached a consensus on whether the observed "clumps" are same phenomenon that seen simulations. In this paper, as step establish benchmark of direct comparisons between observations theories, we publish sample constructed represent commonly literature. This contains 3193 detected from 1270 at $0.5 \leq z < 3.0$. The rest-frame UV...
Abstract The UltraViolet Imaging of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey Fields (UVCANDELS) survey is a Hubble Space Telescope (HST) Cycle-26 Treasury Program, allocated in total 164 orbits primary Wide-Field Camera 3 Ultraviolet and VISible light F275W imaging with coordinated parallel Advanced for Surveys F435W imaging, on four five premier extragalactic fields: GOODS-N, GOODS-S, EGS, COSMOS. We introduce this by presenting comprehensive analysis absolute...
We examine the evolution of sizes and number densities disk galaxies using high-resolution images obtained by Great Observatories Origins Deep Survey (GOODS) with Advanced Camera for Surveys on Hubble Space Telescope. The multiwavelength are used to classify based their rest-frame B-band morphologies out redshift z ~ 1.25. In order minimize effect selection biases, we confine our analysis that occupy region magnitude-size plane where survey is ~90% complete at all redshifts. observed size...
We present estimates of intrinsic scatter in the Star Formation Rate (SFR) - Stellar Mass (M*) correlation redshift range 0.5 < z 3.0 and mass 10^7 M* 10^11 Msun. utilize photometry Hubble Ultradeep Field (HUDF12), Ultraviolet Ultra Deep (UVUDF) campaigns CANDELS/GOODS-S. estimate SFR, from broadband Spectral Energy Distributions (SEDs) best available redshifts. The maximum depth HUDF (F160W 29.9 AB, 5 sigma depth) probes SFR-M* down to ~ 10 ^7 Msun, a factor 10-100X lower than previous...
Abstract UVCANDELS is a Hubble Space Telescope Cycle-26 Treasury Program awarded 164 orbits of primary ultraviolet (UV) F275W imaging and coordinated parallel optical F435W in four CANDELS fields—GOODS-N, GOODS-S, EGS, COSMOS—covering total area ∼426 arcmin 2 . This ∼2.7 times larger than the covered by previous deep-field space UV data combined, reaching depth about 27 28 ABmag (5 σ 0.”2 apertures) for F435W, respectively. Along with new photometric catalogs, we present an analysis...
Deep, multiband observations of high Galactic latitude fields are an essential tool for studying topics ranging from structure to extragalactic background radiation. The Hubble Deep Field (HDF-N) obtained in 1995 December established a standard such narrow, deep surveys. field has been extensively analyzed by variety groups and widely studied with imaging spectroscopy over wavelengths 10-3 2 × 105 μm. We describe here second campaign (HDF-S), this time the southern hemisphere, undertaken...
Understanding the physical formation of Hubble sequence remains one most important unsolved astrophysical problems. Searches for protodisks and proto-elliptical galaxies can now be effectively done using deep wide-field Space Telescope images taken with new Advanced Camera Surveys. Through an analysis concentrations (C), asymmetries (A), clumpiness values (S) found in Great Observatories Origins Deep Survey Field South, we are able to identify objects possibly forming onto sequence. Using...
We present the results of rest-frame, UV slitless spectroscopic observations a sample 32 z ∼ 0.7 Lyman break galaxy (LBG) analogs in COSMOS field. The search was performed with Solar Blind Channel on Hubble Space Telescope. report detection leaking continuum (LyC) radiation from an active galactic nucleus–starburst composite. While we find no direct detections LyC emission remainder our sample, achieve individual lower limits (3σ) observed non-ionizing UV-to-LyC flux density ratios, fν (1500...
We present an overview of a 90-orbit Hubble Space Telescope treasury program to obtain near ultraviolet imaging the Ultra Deep Field using Wide Camera 3 UVIS detector with F225W, F275W, and F336W filters. This survey is designed to: (i) Investigate episode peak star formation activity in galaxies at 1<z<2.5; (ii) Probe evolution massive by resolving sub-galactic units (clumps); (iii) Examine escape fraction ionizing radiation from z~2-3; (iv) Greatly improve reliability photometric redshift...
We derive physical properties of 10 submillimeter galaxies located in the CANDELS coverage GOODS-S field. The were first identified as sources with LABOCA bolometer and subsequently targeted for 870um continuum observation ALMA. high angular resolution ALMA imaging allows secure counterparts to be multiband dataset. data provide deep photometric from UV through near-infrared wavelengths. Using synthetic spectral energy distributions, we redshifts, stellar masses, extinction, ages, star...