José Sánchez-Gallego
A5082889305- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Adaptive optics and wavefront sensing
- Geophysics and Gravity Measurements
- Astrophysics and Cosmic Phenomena
- Scientific Research and Discoveries
- Distributed and Parallel Computing Systems
- Computational Physics and Python Applications
- Career Development and Diversity
- Semiconductor Lasers and Optical Devices
- Astrophysical Phenomena and Observations
- Diversity and Career in Medicine
- Radio Astronomy Observations and Technology
- History and Developments in Astronomy
- Remote Sensing in Agriculture
- Marine and coastal ecosystems
- Plant Water Relations and Carbon Dynamics
- 3D Surveying and Cultural Heritage
- Distributed Control Multi-Agent Systems
- Inertial Sensor and Navigation
- Real-Time Systems Scheduling
University of Washington
2016-2025
Earth and Space Research
2024
University of Kentucky
2013-2017
Universidad de La Laguna
2010-2016
Instituto de Astrofísica de Canarias
2010-2016
Consejo Superior de Investigaciones Científicas
2011
We present the cosmological implications from final measurements of clustering using galaxies, quasars, and Ly$\alpha$ forests completed Sloan Digital Sky Survey (SDSS) lineage experiments in large-scale structure. These experiments, composed data SDSS, SDSS-II, BOSS, eBOSS, offer independent baryon acoustic oscillation (BAO) angular-diameter distances Hubble relative to sound horizon, $r_d$, eight different samples six growth rate parameter, $f\sigma_8$, redshift-space distortions (RSD)....
We present an overview of a new integral field spectroscopic survey called MaNGA (Mapping Nearby Galaxies at Apache Point Observatory), one three core programs in the fourth-generation Sloan Digital Sky Survey (SDSS-IV) that began on 2014 July 1. will investigate internal kinematic structure and composition gas stars unprecedented sample 10,000 nearby galaxies. summarize essential characteristics instrument design context MaNGA's key science goals prototype observations to demonstrate...
We describe the sample design for SDSS-IV MaNGA survey and present final properties of main samples along with important considerations using these science. Our target selection criteria were developed while simultaneously optimizing size distribution integral field units (IFUs), IFU allocation strategy, density to produce a defined in terms maximizing S/N, spatial resolution, size. strategy makes use redshift limits that only depend on i-band absolute magnitude ($M_i$), or, small subset our...
Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) is an integral-field spectroscopic survey that one of three core programs in the fourth-generation Sloan Digital Sky Survey (SDSS-IV). MaNGA's 17 pluggable optical fiber-bundle integral field units (IFUs) will observe a sample 10,000 nearby galaxies distributed throughout SDSS imaging footprint (focusing particularly on North Galactic Cap). In each pointing these IFUs are deployed across 3° field; they yield spectral coverage...
Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) is acquiring integral-field spectroscopy for the largest sample of galaxies to date. By 2020, MaNGA Survey --- one three core programs in fourth-generation Sloan Digital Sky (SDSS-IV) will have observed a statistically representative 10$^4$ local Universe ($z\lesssim0.15$). In addition robust data-reduction pipeline (DRP), has developed data-analysis (DAP) that provides higher-level data products. To accompany first public release...
Mapping Nearby Galaxies at Apache Point Observatory (MaNGA), one of three core programs in the Sloan Digital Sky Survey-IV (SDSS-IV), is an integral-field spectroscopic (IFS) survey roughly 10,000 nearby galaxies. It employs dithered observations using 17 hexagonal bundles 2 arcsec fibers to obtain resolved spectroscopy over a wide wavelength range 3,600-10,300A. To map internal variations within each galaxy, we need perform accurate {\it spectral surface photometry}, which calibrate...
We describe the design and performance of near-infrared (1.51--1.70 micron), fiber-fed, multi-object (300 fibers), high resolution (R = lambda/delta lambda ~ 22,500) spectrograph built for Apache Point Observatory Galactic Evolution Experiment (APOGEE). APOGEE is a survey 10^5 red giant stars that systematically sampled all Milky Way populations (bulge, disk, halo) to study Galaxy's chemical kinematical history. It was part Sloan Digital Sky Survey III (SDSS-III) from 2011 -- 2014 using 2.5...
ABSTRACT Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) is an optical fiber-bundle integral-field unit (IFU) spectroscopic survey that one of three core programs in the fourth-generation Sloan Digital Sky Survey (SDSS-IV). With a spectral coverage 3622–10354 Å and average footprint ∼500 arcsec 2 per IFU scientific data products derived from MaNGA will permit exploration internal structure statistically large sample 10,000 low-redshift galaxies unprecedented detail. Comprising...
SDSS-V will be an all-sky, multi-epoch spectroscopic survey of over six million objects. It is designed to decode the history Milky Way, trace emergence chemical elements, reveal inner workings stars, and investigate origin planets. also create integral-field map gas in Galaxy Local Group that 1,000x larger than current state art at high enough spatial resolution self-regulation mechanisms galactic ecosystems. pioneer systematic, monitoring across whole sky, revealing changes on timescales...
Abstract The Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, one of three core programs the fourth-generation Sloan Digital Sky Survey (SDSS-IV), is producing a massive, high-dimensional integral field spectroscopic data set. However, leveraging MaNGA set to address key questions about galaxy formation presents serious data-related challenges due combination its spatially interconnected measurements and sheer volume. For each galaxy, pipelines produce relatively large...
The MaNGA Survey (Mapping Nearby Galaxies at Apache Point Observatory) is one of three core programs in the Sloan Digital Sky IV. It obtaining integral field spectroscopy (IFS) for 10K nearby galaxies a spectral resolution R~2000 from 3,622-10,354A. design survey driven by set science requirements on precision estimates following properties: star formation rate surface density, gas metallicity, stellar population age, and abundance ratio, their gradients; kinematics; enclosed gravitational...
Abstract Stars that formed with an initial mass of over 50 M ⊙ are very rare today, but they thought to be more common in the early Universe. The fates those early, metal-poor, massive stars highly uncertain. Most expected directly collapse black holes, while some may explode as a result rotationally powered engines or pair-creation instability. We present chemical abundances J0931+0038, nearby low-mass star identified follow-up SDSS-V Milky Way Mapper, which preserves signature unusual...
We present the HI-MaNGA programme of HI follow-up for Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey. MaNGA, which is part Fourth phase Sloan Digital Sky Surveys (SDSS-IV), in process obtaining integral field unit (IFU) spectroscopy a sample ~10,000 nearby galaxies. give an overview 21cm radio observing plans and progress data first 331 galaxies observed 2016 season Robert C. Bryd Green Bank Telescope (GBT). also provide cross match current MaNGA (DR15) with publicly...
Abstract We present the Sloan Digital Sky Survey V Local Volume Mapper (LVM). The LVM is an integral-field spectroscopic survey of Milky Way, Magellanic Clouds, and a sample local volume galaxies, connecting resolved parsec-scale individual sources feedback to kiloparsec-scale ionized interstellar medium (ISM) properties. 4 yr covers southern Way disk at spatial resolutions 0.05–1 pc, Clouds 10 pc resolution, nearby large galaxies larger scales totaling >4300 deg 2 sky more than 55M...
The James Clerk Maxwell Telescope Nearby Galaxies Legacy Survey (NGLS) comprises an HI-selected sample of 155 galaxies spanning all morphological types with distances less than 25 Mpc. We describe the scientific goals survey, selection, and observing strategy. also present atlas analysis CO J=3-2 maps for 47 in NGLS which are part Spitzer Infrared Survey. find a wide range molecular gas mass fractions this explore correlation far-infrared luminosity, traces star formation, mass. By comparing...
Context. The Orion Molecular Cloud complex, one of the nearest (D = 406 pc) and most extensively studied massive star-forming regions, is ideal for constraining physics stellar feedback, but its ~12 deg diameter on sky requires a dedicated approach to mapping ionized gas structures within around nebula. Aims. Sloan Digital Sky Survey (SDSS-V) Local Volume Mapper (LVM) new optical integral field unit (IFU) that will map Milky Way Group galaxies, covering 4300 2 with LVM Instrument (LMV-I)....
Ground-based telescopes require useful and productive instruments to stay relevant in astronomy. The Kitt Peak Ohio State Multi-Object Spectrograph (KOSMOS), originally on the National Observatory (KPNO) Mayall 4 m Telescope, is a long-slit multi-object, low-resolution spectrograph. KOSMOS was acquired by Astrophysical Research Consortium (ARC) for Apache Point (APO) ARC 3.5 telescope, implemented redesigns instrument, renamed II. instrument integrated into m's operational environment adding...
We present the results from spectroscopic monitoring of WR 140 (WC7pd + O5.5fc) during its latest periastron passage in 2009 January. The observational campaign consisted a constructive collaboration between amateur and professional astronomers. It took place at six locations, including Teide Observatory, Observatoire de Haute Provence, Dominion Astrophysical Observatory du Mont Mégantic. is known as archetype colliding-wind binaries it has relatively long period (8 yr) high eccentricity...
We present a study of the molecular gas properties in sample 98 H i – flux selected spiral galaxies within ∼25 Mpc, using CO J = 3 − 2 line observed with James Clerk Maxwell Telescope. use technique survival analysis to incorporate upper limits into our results. Comparing group and Virgo samples, we find larger mean H2 mass galaxies, despite their lower mass. This leads significantly higher ratio for galaxies. Combining data complementary Hα star formation rate measurements, have longer...
We present Hα fluxes, star formation rates (SFRs) and equivalent widths (EWs) for a sample of 156 nearby galaxies observed in the 12CO J= 3–2 line as part James Clerk Maxwell Telescope Nearby Galaxies Legacy Survey. These are derived from images values literature new 72 which we publish here. describe sample, observations procedures to extract fluxes related quantities. discuss SFR properties our confirm well-known correlation with galaxy luminosity, albeit high dispersion. Our SFRs range...
We present an analysis of the radial profiles a sample 43 H i-flux selected spiral galaxies from Nearby Galaxies Legacy Survey (NGLS) with resolved James Clerk Maxwell Telescope (JCMT) CO J = 3 − 2 and/or Very Large Array (VLA) i maps. Comparing Virgo and non-Virgo populations, we confirm that discs are truncated in sample, even for these relatively i-rich galaxies. On other hand, H2 distribution is enhanced near their centres, resulting higher to ratios steeper total gas profiles. This...
Abstract This paper presents the Local Volume Mapper (LVM) telescope system. LVM is one of three surveys that form fifth generation Sloan Digital Sky Survey (SDSS-V), and it employs a coordinated network four, 16 cm diameter telescopes feeding integral field units (IFUs) leading to fiber spectrographs. One hosts science IFU, while two others observe adjacent fields calibrate geocoronal emission. The fourth makes rapid observations bright stars compensate for telluric absorption. entrance...
Abstract We present the first release of MaNGA Stellar Library (MaStar), which is a large, well-calibrated, high-quality empirical library covering wavelength range 3622–10354 Å at resolving power R ∼ 1800. The spectra were obtained using same instrument as used by Mapping Nearby Galaxies Apache Point Observatory (MaNGA) project, piggybacking on Sloan Digital Sky Survey (SDSS-IV)/Apache Galaxy Evolution Experiment 2-N (APOGEE-2N) observations. Compared to previous libraries, MaStar will have...
We present a study of the kinematics isolated spiral galaxy NGC 864, using H{\alpha} Fabry-Perot data obtained with GH{\alpha}FaS instrument at William Herschel Telescope in La Palma, complemented images 3.6 {\mu}m, R band and filter, integral field spectroscopic data. The resulting cubes velocity maps allow galaxy, including in-depth investigations rotation curve, moment maps, residual gradient position-velocity diagrams. find asymmetries bar zone, caused by non-circular motions, probably...