A5101423249- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Black Holes and Theoretical Physics
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Cosmology and Gravitation Theories
- Pulsars and Gravitational Waves Research
- Geography and Environmental Studies in Latin America
- Relativity and Gravitational Theory
- History and Developments in Astronomy
- Higher Education in Latin America
- Nanoparticle-Based Drug Delivery
- Electron and X-Ray Spectroscopy Techniques
- Educational Methods and Psychological Studies
- Leaf Properties and Growth Measurement
- Laser-Plasma Interactions and Diagnostics
- Carbon Nanotubes in Composites
- Scientific Research and Discoveries
- Nuclear Physics and Applications
- Geomagnetism and Paleomagnetism Studies
- Space Exploration and Technology
- Adaptive optics and wavefront sensing
- Particle physics theoretical and experimental studies
Instituto de Astrofísica de La Plata
2014-2024
University of Arizona
2022-2024
Consejo Nacional de Investigaciones Científicas y Técnicas
2014-2024
General Atomics (United States)
2024
Utah State University
2023
Universidad Autónoma de Madrid
2023
SUNY Polytechnic Institute
2020
University at Albany, State University of New York
2007
The PHANGS collaboration has been building a reference dataset for the multi-scale, multi-phase study of star formation and interstellar medium in nearby galaxies. With successful launch commissioning JWST, we can now obtain high-resolution infrared imaging to probe youngest stellar populations dust emission on scales clusters molecular clouds ($\sim$5-50 pc). In Cycle 1, is conducting an 8-band survey from 2-21$\mu$m 19 spiral CO(2-1) mapping, optical integral field spectroscopy, UV-optical...
Abstract A primary new capability of JWST is the ability to penetrate dust in star-forming galaxies identify and study properties young star clusters that remain embedded gas. In this Letter we combine infrared images taken with our optical Hubble Space Telescope (HST) starbursting barred (Seyfert2) spiral galaxy NGC 1365. We find has richest population massive any known within 30 Mpc, ∼30 are more than 10 6 M ⊙ younger Myr. Sixteen these newly discovered from observations. An examination...
Abstract The earliest stages of star formation occur enshrouded in dust and are not observable the optical. Here we leverage extraordinary new high-resolution infrared imaging from JWST to begin study dust-embedded clusters nearby galaxies throughout Local Volume. We present a technique for identifying NGC 7496 (18.7 Mpc), first galaxy be observed by PHANGS–JWST Cycle 1 Treasury Survey. select sources that have strong 3.3 μ m PAH emission based on F300M − F335M color excess identify 67...
We compute the tidal Love numbers and static response coefficients associated to several rotating black holes in higher dimensions, including Myers-Perry holes, rings, strings. These exhibit a rich complex structure as function of hole parameters multipoles. Our results agree limiting cases with known new expressions for various lower-dimensional holes. In particular, we provide an alternative approach computation Kerr case boosted string.
Abstract We use 0.1″ observations from the Atacama Large Millimeter Array (ALMA), Hubble Space Telescope (HST), and JWST to study young massive clusters (YMCs) in their embedded “infant” phase across central starburst ring NGC 3351. Our new ALMA data reveal 18 bright compact (sub-)millimeter continuum sources, of which 8 have counterparts images only 6 HST images. Based on molecular line data, as well ancillary measurements for counterparts, we identify 14 sources infant star with high...
Abstract We present the largest catalog to date of star clusters and compact associations in nearby galaxies. have performed a V -band-selected census across 38 spiral galaxies PHANGS–Hubble Space Telescope (HST) Treasury Survey, measured integrated, aperture-corrected near-ultraviolet- U-B-V-I photometry. This work has resulted uniform catalogs that contain ∼20,000 associations, which passed human inspection morphological classification, larger sample ∼100,000 classified by neural network...
We present a comparison of observed polycyclic aromatic hydrocarbon (PAH) feature ratios in 19 nearby galaxies with grid theoretical expectations for near- and mid-infrared dust emission. The PAH are drawn from Cycle 1 JWST observations measured 7224 stellar clusters 29176 associations which we have robust ages mass estimates HST five-band photometry. Though there galaxy-to-galaxy variations, the largely agree models, particularly those that skewed toward more ionized larger size...
Abstract We present a comparison of observed polycyclic aromatic hydrocarbon (PAH) feature ratios in 19 nearby galaxies with grid theoretical expectations for near- and mid-infrared dust emission. The PAH are drawn from Cycle 1 JWST observations measured 7224 stellar clusters 29,176 associations which we have robust ages mass estimates Hubble Space Telescope five-band photometry. Though there galaxy-to-galaxy variations, the largely agree models, particularly those that skewed toward more...
Abstract JWST observations, when combined with Hubble Space Telescope (HST) data, promise to improve age estimates of star clusters in nearby spiral galaxies. However, feedback from young cluster stars pushes out the natal gas and dust, making formation evolution a challenge model. Here, we use JWST+ HST observations galaxy NGC 628 produce spectral energy distribution (SED) templates compact spanning 275 nm through 21 μ m. These preliminary SEDs capture associated dust within radii ≈0...
Aims. The purpose of this work is to understand the global characteristics stellar populations in NGC 300. In particular, we focused our attention on searching young star groups and study their hierarchical organization. proximity orientation Sculptor Group galaxy make it an ideal candidate for study.
The aim of this work is to investigate the characteristics young stellar population in spiral galaxy NGC 247. In particular, we focused our attention its hierarchical clustering distributions and properties smallest groups. We used multiband Hubble Space Telescope (HST) data from three fields covering more than half 247 select population. Then, through path linkage criterion (PLC), found compact star groups, estimated their fundamental parameters, such as densities, sizes, amount members...
We employed the ESO Max Planck Institute (MPI) wide-field camera (Baade et al.) and obtained deep images in VIC pass-bands region of IC 2944/2948 complex (l ∼ 294| $_{.}^{\circ}$|8; b −1| $_{.}^{\circ}$|6), complemented them with literature archival data. used this material to derive photometric, spectroscopic kinematic properties brightest (V < 16) stars region. The VI photometry on other end, helped us unravel lower main sequence a few, possibly physical, star groups area. Our analysis...
While static Love number vanish identically for Kerr black holes, we show that the corresponding dynamical tidal coefficients are generically non-zero and exhibit logarithmic behavior. The computational method employs a related but simpler scheme consistent with CFT descriptions, low-frequency regimes post-Newtonian results. These illustrated numerical examples.
We present a study of the young population in starburst galaxy NGC 253.In particular, we focused our attention on searching for star groups, obtaining their main properties and studying hierarchical organization.For this task, used multiband images corresponding photometric data obtained with Advanced Camera Surveys Hubble Space Telescope (ACS/HST).We first derived absorption affecting different regions galaxy.Then, applied an automatic objective method over corrected order to detect...
ABSTRACT We present a study of the internal structure 82 star clusters located at outer regions Large Magellanic Cloud and Small using data VISCACHA Survey. Through construction minimum spanning tree, which analyses relative position stars within given cluster, it was possible to characterize explore fractal or subclustered distribution for each cluster. computed parameters $\overline{m}$ (which is average length connected segments normalized by area), $\overline{s}$ mean points separation...
We derive the explicit embedding of effective Kerr spacetimes, which are pertinent to vanishing static Love numbers, soft hair descriptions black holes, and low-frequency scalar-Kerr scattering amplitudes, as solutions within N = 2 supergravity. These spacetimes exhibit a hidden $SL(2, R) \times U (1)$ or $SO(4, 2)$ symmetry resembling so called subtracted geometries with SL(2, R)$ symmetry, accurately represent near-horizon geometry holes and, we will argue most represents internal...
We uncover the thermodynamical properties of a class non-asymptotically flat geometries, referred here as Kerr effective that realize hidden symmetries black hole spacetimes via Teukolsky's equation in theory linear gravitational perturbations. While thermodynamic properties, such entropy, remain same those holes, asymptotic charges, we will demonstrate, are different. In this new framework with ambient boundary removed, derive mass and angular momentum geometries using regulated Komar...
The earliest stages of star and cluster formation are hidden within dense cocoons gas dust, limiting their detection at optical wavelengths. With the unprecedented infrared capabilities JWST, we can now observe dust-enshrouded with $\sim$10 pc resolution out to $\sim$20 Mpc. Early findings from PHANGS-JWST suggest that 3.3 $\mu$m polycyclic aromatic hydrocarbon (PAH) emission identify clusters in dust-embedded phases. Here, extend this analysis 19 galaxies Cycle 1 Treasury Survey, providing...
We perform a detailed study of the gravitational tidal Love numbers extremal zero-temperature Kerr black holes. These coefficients are finite and exhibit dissipative nature these maximally spinning Upon considering dynamical behavior deformations holes, we provide explicit expressions at low frequencies. Their calculation is simplified to specific formulas, which directly derived using Leaver-MST methods.
Aims: The purpose of this work is to study the properties spatial distribution young population in three nearby galaxies order better understand first stages star formation. Methods: We used ACS/HST photometry and "path-linkage criterion" obtain a catalog stellar groups (YSGs) galaxy NGC 2403. studied internal stars these YSGs using Q parameter. extended analyses detected 300 253 our previous works. built stars' density maps for galaxies. Through maps, we were able identify structures on...
The images provided by the Advanced Camera for Surveys at Hubble Space Telescope (ACS/HST) have amazing spacial resolution of 0".05/pixel. Therefore, it is possible to resolve individual stars in nearby galaxies and, particular, young blue associations and open clusters recent starburst. These data are useful studies extragalactic population using color magnitude diagrams (CMD) stellar groups. However, even with excellent indicated spatial resolution, blending several crowded fields can...
We report on the unveiling of nature unidentified X-ray source 3XMM J005450.3-373849 as a Seyfert-2 galaxy located behind spiral NGC 300 using Hubble Space Telescope data, new spectroscopic Gemini observations and available XMM-Newton Chandra data. show that is positionally coincident with an extended optical source, composed by marginally resolved nucleus/bulge, surrounded elliptical disc-like feature two symmetrical outer rings. The spectrum typical redshifted to z=0.222 +/- 0.001, which...