A5066686224- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Astro and Planetary Science
- Solar and Space Plasma Dynamics
- Geophysics and Gravity Measurements
- History and Developments in Astronomy
- Adaptive optics and wavefront sensing
- Scientific Research and Discoveries
- Spacecraft and Cryogenic Technologies
- Spectroscopy and Laser Applications
- Pulsars and Gravitational Waves Research
- Calibration and Measurement Techniques
- Ionosphere and magnetosphere dynamics
- Atmospheric Ozone and Climate
- Particle accelerators and beam dynamics
- Cosmology and Gravitation Theories
- Radio Astronomy Observations and Technology
- Geomagnetism and Paleomagnetism Studies
- Optical Polarization and Ellipsometry
Universidad Nacional Autónoma de México
2015-2024
Instituto de Geofísica y Astronomía
1994-2020
Laboratoire d’Astrophysique de Marseille
2019
Château Gombert
2019
Universitat Autònoma de Barcelona
1982-2013
Universidad Complutense de Madrid
2006
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
2006
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
2003
Iqra University
2003
Alfred University
2003
We report the first APOGEE metallicities and alpha-element abundances measured for 3600 red giant stars spanning a large radial range of both Large (LMC) Small Magellanic Clouds (SMC), largest Milky Way dwarf galaxies. Our sample is an order magnitude larger than that previous studies, extends to much distances. These are results presented make use newly installed Southern instrument on du Pont telescope at Las Campanas Observatory. unbiased LMC spans in metallicity, from [Fe/H]=-0.2 very...
The SDSS-IV Apache Point Observatory Galactic Evolution Experiment (APOGEE) survey has obtained high-resolution spectra for thousands of red giant stars distributed among the massive satellite galaxies Milky Way (MW): Large and Small Magellanic Clouds (LMC/SMC), Sagittarius Dwarf (Sgr), Fornax (Fnx), now fully disrupted \emph{Gaia} Sausage/Enceladus (GSE) system. We present analyze APOGEE chemical abundance patterns each galaxy to draw robust conclusions about their star formation histories,...
El Certamen de Investigación Cultural Publio Hurtado pretende promover los trabajos investigación sobre el patrimonio etnológico y la antropología cultural Extremadura. Su denominación quiere ser un homenaje al polígrafo extremeño autor del trabajo Supersticiones extremeñas estrechamente vinculado a creación Museo Cáceres través Comisión Monumentos Históricos Artísticos Cáceres, que formó parte entre 1897 momento su fallecimiento en 1929, siendo presidente últimos diez años. Actualmente...
Stephan's Quintet (SQ) is a compact group that we find in an atypical moment when high-velocity intruder passing through it. The intrusion particularly interesting because previous had stripped most of the gas from members. This debris field was shocked ongoing collision with new intruder. evolutionary history agrees well observations and explains how strongly interacting system can show low levels star formation. We present multiwavelength data including previously unpublished ROSAT X-ray,...
We present optical spectroscopy of Hii regions in the Local Group galaxy IC 10 and UBVR photometry foreground stars three fields towards this galaxy. From these data, we find that reddening due to Milky Way is . contains considerable internal dust, which qualitatively explains variety values found by studies its different stellar populations. Based upon our reddening, has intrinsic photometric properties like those a blue compact dwarf galaxy, not irregular. This result consistent with much...
Massive stars are expected to produce wind-blown bubbles in the interstellar medium; however, ring nebulae, suggesting existence of bubbles, rarely seen around main-sequence O stars. To search for stars, we have obtained high-resolution Hubble Space Telescope WFPC2 images and high-dispersion echelle spectra two pristine H II regions, N11B N180B, Large Magellanic Cloud. These regions ionized by OB associations that still contain O3 young not hosted any supernova explosions. Our observations...
The emission nebula M17 contains a young ~1 Myr old open cluster; the winds from OB stars of this cluster have blown superbubble around cluster. ROSAT observations detected diffuse X-ray peaking at and filling interior. age suggests that no supernovae yet occurred in M17; therefore, it provides rare opportunity to study hot gas energized solely by shocked stellar quiescent superbubble. We analyzed compared observed luminosity ~2.5 × 1033 ergs s-1 temperature ~8.5 106 K mass M☉ model...
Gas reservoirs, internal or acquired, play an important role in the secular evolution of interacting galaxies, since they are able to enhance/trigger star formation episodes and, probably, feed activity active galactic nuclei. Using Fabry–Perot observations, we have mapped, Hα line, warm (T≈ 104) gas distribution and velocity fields galaxy members five interacting, gas-rich systems. We investigated two M51-like systems (Arp 70 Arp 74), containing highly disrupted (WBL 366 RR 24) a case...
view Abstract Citations (42) References (18) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Pulsar radio emission from beam plasma instability Asseo, E. ; Pellat, R. Rosado, M. A two step maser mechanism has been recently proposed for the pulsar emissions: a spatial modulation of density relativistic particles results an electrostatic instability; bunches flowing along curved magnetic field lines coherently radiate electromagnetic waves. In this work, it is...
We present direct images in the H$α$ and [SII]$λλ$6717,6731 $\textÅ$ lines of Galactic Supernova Remnant G109.1-1.0 (CTB 109). confirm that filaments detected are optical counterpart X-ray radio supernova remnant due to their high [SII]/H$α$ line-ratios. study for first time kinematics SNR CTB 109 using UNAM scanning Fabry-Perot interferometer PUMA. estimate a systemic velocity V$_{LSR}$=-50$\pm$6 km s$^{-1}$ this an expansion V$_{exp}$=230$\pm$5 s$^{-1}$. From value taking into account...
Aims.We study the neutral hydrogen distribution and kinematics in Local Group dwarf irregular galaxy IC 1613 compare them with ionized gas stellar content of galaxy. We discuss several mechanisms which may be responsible for origin observed complicated HI morphology parameters most prominent kpc-scale structure multiple SNe scenario.Methods.The observations were performed Vary Large Array NRAO a linear resolution ~ 23 pc at adopted distance 725 kpc spectral channel width 2.57 km s-1. The...
We present a multiwavelength study of the highly evolved compact galaxy group known as Seyfert's Sextet (HCG79: SS). interpret SS 2–3 Gyr more analog Stephan's Quintet (HCG92: SQ). postulate that formed by sequential acquisition 4–5 primarily late-type field galaxies. Four five galaxies show an early-type morphology which is likely result secular evolution driven gas stripping. Stellar stripping has produced massive/luminous halo and embedded are overluminous for their size. These...
This paper is the second of a series papers in which we are exploring coevolution galaxies and groups local Universe, by adopting multiwavelength approach. Here, present photometric kinematic characterization two groups, USGC U268 U376 (U268 hereafter), located different regions Leo cloud. We revisit group membership, using results from recent redshift surveys, investigate their substructures. U268, composed 10 catalogued members 11 new added members, has small fraction (≈24 per cent)...
The distance of the Galactic supernova remnant (SNR) IC 443 (G189.1+3.0, 3C157) is uncertain. Results based on measurements in optical range from 0.7 to 1.5 kpc, while assumption that SNR associated with H ii region S249 implies a 1.5–2 kpc. We present kinematics north-eastern 443. results were obtained using scanning Fabry–Pérot interferometer at α line. derived velocity cubes enabled us obtain kinematic this nebula. estimate located about 1.9 kpc Sun. shows complex morphology consisting...
The morphology, dynamics, and thermal X-ray emission of the superbubble N70 are studied by means three-dimensional hydrodynamic simulations carried out with yguazú-a code. We consider three possible scenarios: being product a single supernova remnant, stellar winds from an OB association, or joint action (SN) event. Our results show that, in spite fact that all scenarios produce bubbles observed physical size, only those which bubble is driven SN event successfully explain general luminosity...
We report the results of a kinematical Hα survey Large Magellanic Cloud (LMC) presented in form and photometric catalogue 210 H ii regions. The observations have been obtained with scanning Fabry–Perot interferometer that produced data cubes corresponding to 66 different pointings over this galaxy, each field view 38 arcmin, covering almost whole extent LMC. find bimodal distribution luminosity LMC also derive local star formation rate (SFR) per unit area nebulae, concluding has proceeded...
Context. NGC 6946, also known as the “Fireworks Galaxy”, is an unusual galaxy that hosts a total of 225 supernova remnant (SNR) candidates, including 147 optically identified with high [S II ]/H α line ratios. In addition, this shows prominent H I holes, which have been analyzed in previous studies. Indeed, connection between SNRs and holes along their physical implications surrounding gas are worthy attention. Aims. This paper explores analysis link to observational optical properties...
We describe observations of the 2.12 μm molecular hydrogen emission in Orion using an IR Fabry-Perot interferometer with a spectral resolution 24 km s-1 and 2'' spatial covering region 36×36 (0.46×0.46 pc2) that contains H2 filamentary finger system located to northwest Trapezium. develop simple model explain observed low-velocity structure as described by its radial moments: intensity, velocity centroid, dispersion, skewness. assume strong wind 230 produced IRc2 interacting set clumps...
We present Hα and [Sii] observations for the Local Group irregular galaxy IC 1613 using PUMA scanning Fabry-Perot interferometer. Our goal is to analyze kinematics of ionized gas in complex sample superbubbles located whole extension our field (10´), which includes most optical emission this galaxy, study inter-relationship between young stellar associations nebulae based on a previous that we have made central region galaxy. The distributed classical Hii regions series (also called giant...
We present Hα observations of the isolated interacting galaxy pair NGC 5426/27 using scanning Fabry-Perot interferometer PUMA. The velocity field, various kinematical parameters and rotation curve for each were derived. FWHM map residual velocities also computed to study role non-circular motions gas. Most these can be associated with presence spiral arms structure such as central bars. found a small bar-like in 5426, distorted field 5427 bridge-like feature between both galaxies which seems...
We present high angular resolution (0.86'') observations of the kinematics molecular hydrogen in one zones interaction a cloud with Galactic supernova remnant IC 443. This has been done using scanning Fabry-Pérot interferometer at near-IR line 2.12 μm hydrogen. The derived from velocity cubes thus obtained allows us to have better insight into type motions (and thereby shocks) gas smaller scales this zone interaction, taking account complex morphology and knots, diffuse gas, filaments that...
We present observations in the optical lines of Hα and [S ii] (λλ6717, 6731 Å) X-rays irregular galaxy, NGC 1569. The were made with UNAM scanning Fabry–Perot interferometer (PUMA) X-ray data obtained from Chandra archive. detected several superbubbles, filaments, supershells 1569 for which we determined size as well their kinematic properties. a catalog expansion velocities 12 listing positions, diameters, physical parameters. Likewise, 15 filaments 4 supershells. In order to identify...
Abstract We present an analysis of the optical properties three Ultra Luminous X-ray (ULX) sources identified in NGC 925. use Integral field unit data from George Mitchel spectrograph context Metal-THINGS survey. The for ULX-1 and ULX-3 are presented, while spaxel associated with ULX-2 had a low S/N, which prevented its analysis. also report kinematics dimensions nebula each ULX using ancillary PUMA Fabry–Perot spectrograph. A BPT demonstrates that most spaxels 925 dominated by star-forming...