Jorge González-López
A5027437559- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Radio Astronomy Observations and Technology
- Cosmology and Gravitation Theories
- Astronomical Observations and Instrumentation
- Scientific Research and Discoveries
- Spectroscopy and Laser Applications
- Adaptive optics and wavefront sensing
- Pulsars and Gravitational Waves Research
- Dark Matter and Cosmic Phenomena
- Statistical and numerical algorithms
- Real-time simulation and control systems
- Scientific Measurement and Uncertainty Evaluation
- Medical and Agricultural Research Studies
- Advanced Optical Sensing Technologies
- Planetary Science and Exploration
Diego Portales University
2018-2024
Las Campanas Observatory
2020-2024
Carnegie Institution for Science
2020-2024
Carnegie Observatories
2020-2024
Pontificia Universidad Católica de Chile
2014-2022
Max Planck Institute for Astronomy
2014-2021
Leiden University
2021
Max Planck Institute for Radio Astronomy
2021
National Institute for Astrophysics
2021
New Mexico Institute of Mining and Technology
2021
ABSTRACT We make use of deep 1.2 mm continuum observations (12.7 μ Jy beam −1 rms) a 1 arcmin 2 region in the Hubble Ultra Deep Field to probe dust-enshrouded star formation from 330 Lyman-break galaxies spanning redshift range z = 2–10 (to ∼2–3 M ⊙ yr at σ over entire range). Given depth and area ASPECS, we would expect tentatively detect 35 galaxies, extrapolating Meurer ∼ 0 IRX– β relation ≥ (assuming dust temperature T d K). However, only six tentative detections are found ≳ with just...
Using the Australia Telescope Compact Array (ATCA), we conducted a survey of CO J=1-0 and J=2-1 line emission towards strongly lensed high-redshift dusty star forming galaxies (DSFGs) previously discovered with South Pole (SPT). Our sample comprises 17 sources that had CO-based spectroscopic redshifts obtained Atacama Large Millimeter/submillimeter (ALMA) Pathfinder Experiment (APEX). We detect all known in either or J=2-1. Twelve are detected 7-mm continuum. The derived luminosities imply...
ABSTRACT We present an analysis of a deep (1 σ = 13 μ Jy) cosmological 1.2 mm continuum map based on ASPECS, the ALMA Spectroscopic Survey in Hubble Ultra Deep Field. In 1 arcmin 2 covered by ASPECS we detect nine sources at <?CDATA $\gt 3.5\sigma $?> significance mm. Our ALMA-selected sample has median redshift $z=1.6\pm 0.4$?> , with only one galaxy detected z > within survey area. This value is significantly lower than that found millimeter samples selected higher flux density cutoff...
We present the rationale for and observational description of ASPECS: The ALMA SPECtroscopic Survey in Hubble Ultra-Deep Field (UDF), cosmological deep field that has deepest multi-wavelength data available. Our overarching goal is to obtain an unbiased census molecular gas dust continuum emission high-redshift (z$>$0.5) galaxies. $\sim$1$'$ region covered within UDF was chosen overlap with available imaging from HST. observations consist full frequency scans band 3 (84-115 GHz) 6...
We make use of sensitive (9.3 microJy/beam RMS) 1.2mm-continuum observations from the ASPECS ALMA large program Hubble Ultra Deep Field (HUDF) to probe dust-enshrouded star formation 1362 Lyman-break galaxies spanning redshift range z=1.5-10 (to ~7-28 Msolar/yr at 4 sigma over entire range). find that fraction ALMA-detected in our samples increases steeply with stellar mass, detection rising 0% 10^9 Msolar 85(-18)(+9)% >10^{10} Msolar. Moreover, stacking all 1253 low-mass (<10^{9.25} Msolar)...
We combine the recent determination of evolution cosmic density molecular gas (H2) using deep, volumetric surveys, with previous estimates stellar mass, star formation rate and atomic (H i), to constrain baryons associated galaxies averaged over time space. The H i H2 densities are roughly equal at z ∼ 1.5. then decreases by a factor today's value, whereas stays approximately constant. mass is increasing continuously surpasses that total H2) redshift growth in cannot be accounted for...
We present ALMA observations of the [C ii] line and far-infrared (FIR) continuum a normally star-forming galaxy in reionization epoch, z = 6.96 Lyα emitter (LAE) IOK-1. Probing to sensitivities σline 240 μJy beam−1 (40 km s−1 channel) σcont 21 beam−1, we found undetected both continuum. Comparison ultraviolet (UV)–FIR spectral energy distribution (SED) IOK-1, including our limit, with those several types local galaxies (including effects cosmic microwave background, CMB, on FIR continuum)...
We present a CO and atomic fine-structure line luminosity function analysis using the ALMA Spectroscopic Survey in Hubble Ultra Deep Field (ASPECS). ASPECS consists of two spatially-overlapping mosaics that cover entire 3mm 1.2mm bands. combine results candidate search data cube with those previously obtained from cube. Our shows $\sim$80% flux observed at arises CO(2-1) or CO(3-2) emitters $z$=1-3 (`cosmic noon'). At 1.2mm, more than half intermediate-J transitions ($J_{\rm up}$=3-6);...
The ALMA Spectroscopic Survey in the Hubble Ultra Deep Field (ASPECS) provides new constraints for galaxy formation models on molecular gas properties of galaxies. We compare results from ASPECS to predictions two cosmological models: IllustrisTNG hydrodynamical simulations and Santa Cruz semi-analytic model (SC SAM). explore several recipes H$_2$ content galaxies, finding them be consistent with one another, take into account sensitivity limits survey area ASPECS. For a canonical...
Abstract We present the results from 1.2 mm continuum image obtained as part of Atacama Large Millimeter/submillimeter Array Spectroscopic Survey in Hubble Ultra Deep Field. The has a size 2.9 (4.2) arcmin 2 within primary beam response 50% (10%) and an rms value <?CDATA $9.3\,\mu \mathrm{Jy}\,{\mathrm{beam}}^{-1}$?> . detect 35 sources at high significance (Fidelity ≥0.5); 32 have well-characterized near-infrared Space Telescope counterparts. estimate number counts to flux levels $\lt...
Abstract We present a new measurement of the Ly α luminosity function (LF) at redshift z = 6.9, finding moderate evolution from 5.7 that is consistent with fully or largely ionized ∼ 7 intergalactic medium. Our result based on four fields LAGER (Lyman Alpha Galaxies in Epoch Reionization) project. survey volume 6.1 × 10 6 Mpc 3 double next largest survey. combine two (WIDE12 and GAMA15A) previously reported (COSMOS CDFS). In fields, we identify N 95 6.9 emitter (LAEs) candidates,...
Abstract We present a joint analysis of the galaxy S04590 at z = 8.496 based on NIRSpec, NIRCam, and NIRISS observations obtained as part Early Release Observations program James Webb Space Telescope (JWST) far-infrared [C ii ] 158 μ m emission line detected by dedicated Atacama Large Millimeter/submillimeter Array (ALMA) observations. determine physical properties from modeling spectral energy distribution (SED) through redshifted optical nebular lines with JWST/NIRSpec. The best-fit SED...
Abstract We present Atacama Large Millimeter/submillimeter Array (ALMA) deep spectroscopy for a lensed galaxy at z spec = 8.496 with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>log</mml:mi> <mml:mo stretchy="false">(</mml:mo> <mml:msub> <mml:mrow> <mml:mi>M</mml:mi> </mml:mrow> <mml:mi>star</mml:mi> </mml:msub> stretchy="true">/</mml:mo> <mml:mo>⊙</mml:mo> stretchy="false">)</mml:mo> <mml:mo>∼</mml:mo> <mml:mn>7.8</mml:mn> </mml:math> whose optical...
Massive star-forming galaxies in the high-redshift universe host large reservoirs of cold gas their circumgalactic medium (CGM). Traditionally, these have been linked to diffuse H I Lyman- α (Ly ) emission extending beyond ≈10 kpc scales. In recent years, millimeter and submillimeter observations started identify even colder CGM through molecular and/or atomic tracers such as [C II ] 158 μm transition. this context, we studied well-known J1000+0234 system at z = 4.54 that hosts a massive...
ABSTRACT In this paper we use ASPECS, the ALMA Spectroscopic Survey in Hubble Ultra Deep Field band 3 and 6, to place blind constraints on CO luminosity function evolution of cosmic molecular gas density as a redshift up z ∼ 4.5. This study is based galaxies that have been selected solely through their emission not any other property. all bins ASPECS measurements reach predicted “knee” (around 5 × 10 9 K km s −1 pc 2 ). We find clear evidence an with respect 0, more CO-luminous present at 2....
ABSTRACT We study the molecular gas properties of high- z galaxies observed in ALMA Spectroscopic Survey (ASPECS) that targets an ∼1 arcmin 2 region Hubble Ultra Deep Field (UDF), a blind survey CO emission (tracing gas) 3 and 1 mm bands. Of total 1302 field, 56 have spectroscopic redshifts correspondingly well-defined physical properties. Among these, 11 infrared luminosities <?CDATA ${L}_{\mathrm{IR}}\gt {10}^{11}$?> ${L}_{\odot }$?> , i.e., detection was expected. Out 7 are detected at...
Abstract We use the results from ALMA large program ASPECS, spectroscopic survey in Hubble Ultra Deep Field (HUDF), to constrain CO luminosity functions of galaxies and resulting redshift evolution ρ (H 2 ). The broad frequency range covered enables us identify emission lines different rotational transitions HUDF at z > 1. find strong evidence that function evolves with redshift, knee decreasing by an order magnitude ∼2 local universe. Based on Schechter fits, we estimate our observations...
ABSTRACT We present a search for [C ii ] line and dust continuum emission from optical dropout galaxies at z > 6 using ASPECS, our Atacama Large Millimeter submillimeter Array Spectroscopic Survey in the Hubble Ultra-deep Field (UDF). Our observations, which cover frequency range of 212–272 GHz, encompass approximately < 8 reach limiting luminosity L ∼ (1.6–2.5) × 10 ⊙ . identify 14 emitting candidates this redshift with significances >4.5 σ , two correspond to blind detections no...
Dusty star-forming galaxies are among the most prodigious systems at high redshift (z>1), characterized by star formation rates and huge dust reservoirs. The bright end of this population has been well in recent years, but considerable uncertainties remain for fainter dusty galaxies, which responsible bulk thus play a key role galaxy growth evolution. In first paper our series, we describe methods finding faint using millimeter observations with ALMA. We obtained ALMA 1.1 mm mosaic images...
Using the NSF's Karl G. Jansky Very Large Array (VLA), we report six detections of CO(J=1-0) emission and one upper limit in z=2-3 galaxies originally detected higher-J CO Atacama submillimeter/Millimeter (ALMA) Spectroscopic Survey Hubble Ultra Deep Field (ASPECS). From line strengths, measure total cold molecular gas masses M_gas = 2.4-11.6 x 10^10 (alpha_CO/3.6) Msun. We also a median CO(J=3-2) to brightness temperature ratio r_31 0.84 +/- 0.26, CO(J=7-6) range r_71 <0.05 0.17. These...
We present a characterization of the physical properties sample 35 securely-detected, dusty galaxies in deep ALMA 1.2-mm image obtained as part Spectroscopic Survey {\it Hubble} Ultra Deep Field (ASPECS) Large Program. This is complemented by 26 additional sources identified via an optical/infrared source positional prior. Using their well-characterized spectral energy distributions, we derive median stellar masses and star formation rates (SFR) $4.8\times10^{10}~M_\odot$ 30 $M_\odot$...
Abstract Using the deepest 1.2 mm continuum map to date in Hubble Ultra Deep Field, which was obtained as part of ALMA Spectroscopic Survey (ASPECS) large program, we measure cosmic density dust and implied gas (H 2 +H i ) mass galaxies a function look-back time. We do so by stacking contribution from all H -band selected above given stellar distinct redshift bins, <?CDATA ${\rho }_{\mathrm{dust}}({M}_{* }\gt M,z)$?> }_{\mathrm{gas}}({M}_{* . At redshifts, grow rapidly M decreases down 10 ⊙...
We discuss the nature and physical properties of gas-mass selected galaxies in ALMA spectroscopic survey (ASPECS) Hubble Ultra Deep Field (HUDF). capitalize on deep optical integral-field spectroscopy from MUSE HUDF Survey multi-wavelength data to uniquely associate all 16 line-emitters, detected without preselection, with rotational transitions carbon monoxide (CO). identify ten as CO(2-1) at $1 < z 2$, five CO(3-2) $2 3$ one CO(4-3) $z = 3.6$. Using a prior, we two additional...
Abstract Spiral arms serve crucial purposes in star formation and galaxy evolution. In this paper, we report the identification of “A2744-DSG- z 3,” a dusty, multiarm spiral at = 3.059 using James Webb Space Telescope (JWST) NIRISS imaging grism spectroscopy. A2744-DSG-z3 was discovered as gravitationally lensed submillimeter with Atacama Large Millimeter/submillimeter Array (ALMA). This is most distant stellar structure seen thus far, consistent cosmological simulations that suggest ≈ 3...