M. García-Marín
A5066806045- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Astrophysical Phenomena and Observations
- Gamma-ray bursts and supernovae
- Adaptive optics and wavefront sensing
- Astronomical Observations and Instrumentation
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Calibration and Measurement Techniques
- Mechanics and Biomechanics Studies
- Spectroscopy and Laser Applications
- Heat Transfer Mechanisms
- Superconducting and THz Device Technology
- Geophysics and Gravity Measurements
- Historical Studies on Spain
- Astro and Planetary Science
- Comparative constitutional jurisprudence studies
- Solar and Space Plasma Dynamics
- Scientific Measurement and Uncertainty Evaluation
- History and Developments in Astronomy
- Medieval and Early Modern Iberia
- Superconducting Materials and Applications
- Dark Matter and Cosmic Phenomena
Corporación Universitaria Americana
2025
Space Telescope Science Institute
2016-2024
European Space Agency
2023
European Space Astronomy Centre
2022
Max Planck Institute for Astronomy
2019
Max Planck Society
2015-2019
University of Cologne
2008-2017
Max Planck Institute for Radio Astronomy
2015-2017
Czech Academy of Sciences, Astronomical Institute
2017
Université Paris Cité
2015
Abstract The James Webb Space Telescope (JWST) Early Release Observations (EROs) is a set of public outreach products created to mark the end commissioning and beginning science operations for JWST. Colloquially known as “Webb First Images Spectra,” these were intended demonstrate worldwide that JWST ready science, capable producing spectacular results. package was released on 2022 July 12 included images spectra galaxy cluster SMACS J0723.3-7327 distant lensed galaxies, interacting group...
Abstract The Mid-Infrared Instrument (MIRI) extends the reach of James Webb Space Telescope (JWST) to 28.5 μ m. It provides subarcsecond-resolution imaging, high sensitivity coronagraphy, and spectroscopy at resolutions λ /Δ ∼ 100–3500, with high-resolution mode employing an integral field unit provide spatial data cubes. resulting broad suite capabilities will enable huge advances in studies over this wavelength range. This overview describes history acquiring capability for JWST. discusses...
Abstract We present the ultraviolet luminosity function and an estimate of cosmic star formation rate density at 8 < z 13 derived from deep NIRCam observations taken in parallel with MIRI Deep Survey Hubble Ultra Field (HUDF), covering field 2. Our (40 hr) reach F277W magnitude 30.8 (5 σ ), more than 2 mag deeper JWST public data sets already analyzed to find high-redshift galaxies. select a sample 44 > galaxy candidates based on their dropout nature F115W and/or F150W filters, high...
Abstract Carbon-rich Wolf–Rayet (WR) binaries are a prominent source of carbonaceous dust that contribute to the budget galaxies. The “textbook” example an episodic dust-producing WR binary, 140 (HD 193793), provides us with ideal laboratory for investigating physics and kinematics in extreme environment. This study is among first utilize two separate JWST observations, from Cycle 1 ERS (2022 July) 2 (2023 September), measure 140’s confirm its morphology. To proper motions projected...
The Mid-InfraRed Instrument (MIRI) on the James Webb Space Telescope (JWST) provides measurements over wavelength range 5 to 28.5 μm. MIRI has, within a single "package," four key scientific functions: photometric imaging, coronagraphy, single-source low-spectral resolving power (R ∼ 100) spectroscopy, and medium-resolving 1500 3500) integral field spectroscopy. An associated cooler system maintains at its operating temperature of < 6.7 K. This paper describes driving principles behind...
In this article, we describe the Mid-Infrared Imager Module (MIRIM), which provides broadband imaging in 5–27 μm wavelength range for James Webb Space Telescope. The imager has a pixel scale and total unobstructed view of 74'' × 113''. remainder its nominal 113'' field is occupied by coronagraphs low-resolution spectrometer. We present instrument optical mechanical design. show that test data, as measured during campaigns undertaken at CEA-Saclay, Rutherford Appleton Laboratory, NASA Goddard...
Abstract We describe the sources of stray light and thermal background that affect JWST observations, report actual backgrounds as measured from commissioning early-science compare these levels to prelaunch predictions, estimate impact on science performance, explore how probe achieved configuration deployed observatory. find for almost all applications, observatory is limited by irreducible astrophysical backgrounds, rather than scattered self-emission, wavelengths λ < 12.5 μ m, thus...
Abstract We make use of JWST medium-band and broadband NIRCam imaging, along with ultradeep MIRI 5.6 μ m in the Hubble eXtreme Deep Field to identify prominent line emitters at z ≃ 7–8. Out a total 58 galaxies 7–8, we find 18 robust candidates (≃31%) for (H β + [O iii ]) emitters, based on their enhanced fluxes F430M F444W filters, EW 0 +[O ≃87–2100 Å. Among these 16 lie coverage area 12 exhibit clear flux excess m, indicating simultaneous presence H α emission ) ≃200–3000 This is first time...
Using MIRI on-board JWST we present mid-infrared sub-arcsec imaging (MIRIM) and spectroscopy (MRS) of the hyperluminous infrared system SPT0311-58 at z=6.9. observations are compared with existing ALMA far-infrared continuum [CII]158$\mu$m imaging. Even though suggests very high star formation rates (SFR) in eastern (E) western (W) galaxies system, H$\alpha$ line is not detected. This, together detection Pa$\alpha$ line, implies optical nebular extinction lower limits 4.2 3.9 mag (W), even...
We present MIRI/JWST medium-resolution spectroscopy (MRS) and imaging (MIRIM) of the lensed galaxy MACS1149-JD1 at a redshift z = 9.1092 ± 0.0002, when Universe was about 530 Myr old. detect, for first time, spatially resolved H α emission in above nine. The structure emitting gas consists two clumps, S N, carrying 60% 40% total flux, respectively. luminosity implies an instantaneous star-formation rate range 3.2 0.3 5.3 0.4 M ⊙ yr −1 sub-solar solar metallicities. ionizing photon production...
Abstract Astrometry is one of the main pillars astronomy, and its oldest branches. Over years, an increasing number astrometric works by means Hubble Space Telescope (HST) data have revolutionized our understanding various phenomena. With launch JWST, it becomes almost instinctive to want replicate or improve these results with taken newest, state-of-the-art, space-based telescope. In this regard, initial focus community has been on Near-Infrared detectors board JWST because their high...
Abstract By using an ultradeep JWST/MIRI image at 5.6 μ m in the Hubble eXtreme Deep Field, we constrain role of strong H α emitters (HAEs) during “cosmic reionization” z ≃ 7–8. Our sample HAEs is comprised young (<35 Myr) galaxies, except for one single galaxy (≈300 Myr), with low stellar masses (≲10 9 M ⊙ ). These show a wide range rest-frame UV continuum slopes ( β ), median value = −2.15 ± 0.21, which broadly correlates mass. We estimate ionizing photon production efficiency ξ ion,0 )...
LIRGs are an important class of objects in the low-z universe bridging gap between normal spirals and strongly interacting starbursting ULIRGs. Studies their 2D physical properties still lacking. We aim to understand nature origin ionization mechanisms operating extranuclear regions as a function interaction phase L_IR by using IFS data obtained with VIMOS. Our analysis is based on over 25300 spectra 32 covering all types morphologies entire 10^11-10^12 L_sun range. found strong evidence for...
We present a comprehensive data description for Ks-band measurements of Sgr A*. characterize the statistical properties variability A* in near-infrared, which we find to be consistent with single-state process forming power-law distribution flux density. discover linear rms-flux relation flux-density range up 12 mJy on timescale 24 minutes. This and density implies phenomenological, formally non-linear model can simulate observed extrapolate its behavior higher levels longer timescales....
The detectors in the Mid-Infrared Instrument (MIRI) of James Webb Space Telescope (JWST) are arsenic-21 doped silicon impurity band conduction (Si:As IBC) devices and direct descendants Spitzer IRAC22 long wavelength arrays (channels 3 4). With appropriate data processing, they can provide excellent per-23 formance. In this paper we discuss various non-ideal behaviors these that need to be addressed24 realize their potential. We have developed a set algorithms toward goal, building on...
During the commissioning of James Webb Space Telescope (JWST), mid-infrared instrument (MIRI) observed NGC6552 with MIRI Imager and medium-resolution spectrograph (MRS). is an active galactic nucleus (AGN) at redshift 0.0266 classified as a Seyfert 2 in optical, Compton-thick AGN X-rays. This work exemplifies demonstrates MRS capabilities to study (mid-IR) spectra characterize physical conditions kinematics ionized molecular gas nuclear regions nearby galaxies. We obtained nuclear,...
The Mid-Infrared Instrument (MIRI) aboard the James Webb Space Telescope (JWST) provides observatory with a huge advance in mid-infrared imaging and spectroscopy covering wavelength range of 5–28 µm. This paper describes performance characteristics MIRI imager as understood during commissioning activities, through its first year science operations. We discuss measurements results imager’s point spread function, flux calibration, background, distortion flat fields well pertaining to best...
We report on a successful, simultaneous observation and modeling of the sub-millimeter to near-infrared flare emission Sgr A* counterpart associated with super-massive black hole at Galactic center. Our is based observations that have been carried out 03 June, 2008 using NACO adaptive optics (AO) instrument ESO VLT LABOCA bolometer APEX telescope. Inspection light curves show sub-mm follows NIR delay 1.5+/-0.5 hours. explain by an adiabatic expansion source components.
Context. We report on new simultaneous observations and modeling of the millimeter, near-infrared, X-ray flare emission source Sagittarius A* (SgrA*) associated with super-massive (4 × 106 M⊙) black hole at Galactic center.
There are a number of faint compact infrared excess sources in the central stellar cluster Milky Way. Their nature and origin is unclear. In addition to several isolated objects this kind we find small but dense co-moving (IRS13N) about 3" west SgrA* just 0.5" north bright IRS13E WR O-type stars. Based on their color brightness, there two main possibilities: (1) they may be dust embedded stars older than few Myr, or (2) extremely young, dusty with ages less 1Myr. We present fist H- Ks-band...
We analyse and report in detail new near-infrared (1.45 - 2.45 microns) observations of the Dusty S-cluster Object (DSO/G2) during its approach to black hole at center Galaxy that were carried out with ESO VLT/SINFONI between February September 2014. Before May 2014 we detect spatially compact Br-gamma Pa-alpha line emission from DSO about 40mas east SgrA*. The velocity source, measured red-shifted emission, is 2700+-60 km/s. No blue-shifted above noise level detected position SgrA* or...