A5018543593- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
- Adaptive optics and wavefront sensing
- Astrophysics and Star Formation Studies
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- CCD and CMOS Imaging Sensors
- Cosmology and Gravitation Theories
- Particle Accelerators and Free-Electron Lasers
- High-pressure geophysics and materials
- Remote Sensing in Agriculture
- Radio Astronomy Observations and Technology
- X-ray Spectroscopy and Fluorescence Analysis
- Astro and Planetary Science
- Spectroscopy and Laser Applications
- Geophysics and Gravity Measurements
- Advanced Vision and Imaging
- Laser-Plasma Interactions and Diagnostics
- Calibration and Measurement Techniques
- History and Developments in Astronomy
- Impact of Light on Environment and Health
Centro de Estudios de Física del Cosmos de Aragón
2015-2024
Universidade de São Paulo
2019-2023
Universidade Cidade de São Paulo
2019-2021
Museu de Astronomia e Ciências Afins
2019-2021
University of Warwick
2018
Universitat Politècnica de Catalunya
2018
Instituto de Astrofísica de Canarias
2008-2013
Universidad de La Laguna
2010-2012
Unidades Centrales Científico-Técnicas
2010
Consejo Superior de Investigaciones Científicas
2010
ABSTRACT Cataclysmic variables (CVs) are interacting binaries consisting of at least three components that control their colour and magnitude. Using Gaia, we here investigate the influence physical properties these on position in Hertzsprung–Russell (HR) diagram. The CVs average located between main sequence white dwarf regime, maximum density being GBP − GRP ∼ 0.56 Gabs 10.15. We find a trend orbital period with absolute brightness: decreasing period, become bluer fainter. also identify...
We present the photometric calibration of twelve optical passbands observed by Javalambre Photometric Local Universe Survey (J-PLUS). The proposed method has four steps: (i) definition a high-quality set stars using Gaia information and available 3D dust maps; (ii) anchoring J-PLUS gri to Pan-STARRS solution, accounting for variation with position sources on CCD; (iii) homogenization photometry in other nine filters de-reddened instrumental stellar locus (X - r) versus (g i) colours, where X...
Context. The Javalambre Photometric Local Universe Survey (J-PLUS) has obtained precise photometry in twelve specially designed filters for large numbers of Galactic stars. Deriving their stellar atmospheric parameters and individual elemental abundances is crucial studies structure, the assembly history chemical evolution our Galaxy. Aims. Our goal to estimate not only (effective temperature, Teff, surface gravity, log g, metallicity, [Fe/H]), but also [{\alpha}/Fe] four ([C/Fe], [N/Fe],...
Abstract We present the second NuSTAR and XMM-Newton extragalactic survey of JWST north ecliptic pole (NEP) time-domain field (TDF). The first NEP-TDF had 681 ks total exposure time executed in cycle 5 2019 2020. This survey, acquired from 2020 to 2022 6, adds 880 time. overall is most sensitive date, a 60 sources were detected above 95% reliability threshold. constrain hard X-ray number counts, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>log</mml:mi>...
Abstract We present a catalog of stellar parameters (effective temperature T eff , surface gravity <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>log</mml:mi> <mml:mi>g</mml:mi> </mml:math> age, and metallicity [Fe/H]) elemental-abundance ratios ([C/Fe], [Mg/Fe], [ α /Fe]) for some five million stars (4.5 dwarfs 0.5 giant stars) in the Milky Way, based on colors from Javalambre Photometric Local Universe Survey (J-PLUS) DR3 Gaia EDR3. These estimates are...
A high-resolution spectroscopic survey of postoutburst novae reveals short-lived heavy element absorption systems in a majority near maximum light, having expansion velocities 400-1000 km/s and velocity dispersions between 35-350 km/s. are accelerated outwardly, they all progressively weaken disappear over timescales weeks. few the narrow, deeper reveal rich spectrum singly ionized Sc, Ti, V, Cr, Fe, Sr, Y, Zr, Ba lines. Analysis richest such system, Nova LMC 2005, shows excitation...
The nova T Pyx was observed with high resolution spectroscopy (R ~ 65000) spectroscopy, beginning 1 day after discovery of the outburst and continuing through last visibility star at end May 2011. interstellar absorption lines Na I, Ca II, CH, CH$^+$, archival H I 21 cm emission line observations have been used to determine a kinematic distance. Interstellar diffuse features extinction independent previous assumptions. Sample Fe-peak profiles show optical depth radial velocity evolution...
J-PAS will soon start imaging 8000 deg2 of the northern sky with its unique set 56 filters (R $\sim$ 60). Before, we observed 1 on AEGIS field an interim camera all filters. With this data (miniJPAS), aim at proving scientific potential to identify and characterize galaxy populations goal performing evolution studies across cosmic time. Several SED-fitting codes are used constrain stellar population properties a complete flux-limited sample (rSDSS <= 22.5 AB) miniJPAS galaxies that extends...
The connection between AGN and their host galaxies has been widely studied over recent years, showing it to be of great importance for providing answers some fundamental questions related with fueling mechanisms, formation evolution. Using X-ray one the deepest broad-band optical data sets, we morphology colours in relationship properties sources at redshifts z < 2.0, using a sample 262 Subaru/XMM-Newton Deep Survey (SXDS). Morphological classification was obtained galSVM code, new methods...
Lyman break galaxies (LBGs) represent one of the kinds star-forming that are found in high-redshift universe. The detection LBGs FIR domain can provide very important clues on their dust attenuation and total SFR, allowing a more detailed study than those performed so far. In this work we explore emission sample 16 at z ~ 3 GOODS-North GOODS-South fields individually detected PACS-100um or PACS-160um. These detections demonstrate possibility measuring high redshift. We find PACS-detected...
We estimated the spectral evolution of white dwarfs with effective temperature using Javalambre Photometric Local Universe Survey (J-PLUS) second data release (DR2), that provides twelve photometric optical passbands over 2176 deg2. analysed 5926 r <= 19.5 mag in common between a dwarf catalog defined from Gaia EDR3 and J-PLUS DR2. performed Bayesian analysis by comparing observed photometry theoretical models hydrogen (H) helium (He) dominated atmospheres. PDF for (Teff), surface...
JPCam is a 14-CCD mosaic camera, using the new e2v 9k-by-9k 10 μm-pixel 16-channel detectors, to be deployed on dedicated 2.55 m wide-field telescope at OAJ (Observatorio Astrofísico de Javalambre) in Aragon, Spain. The camera designed perform Baryon Acoustic Oscillations (BAO) survey of northern sky. J-PAS strategy will use 54 relatively narrow-band (~ 13.8 nm) filters equi-spaced between 370 and 920 nm plus 3 broad-band achieve unprecedented photometric red-shift accuracies for faint...
We present a synthetic galaxy lightcone specially designed for narrow-band optical photometric surveys. To reduce time-discreteness effects, unlike previous works, we directly include the construction in \texttt{L-Galaxies} semi-analytic model applied to subhalo merger trees of {\tt Millennium} simulation. Additionally, add nebular emission star-forming regions, which is crucial correctly predicting narrow/medium-band photometry galaxies. Explicitly, consider, individually each galaxy,...
We report the discovery of peculiar features in optical spectrum 4C+22.25, a flat radio quasar at z = 0.4183 observed Sloan Digital Sky Survey and dedicated spectroscopic follow-up from Nordic Optical Telescope. The Hβ Hα lines show broad profiles (FWHM ∼ 12,000 km s−1), faint fluxes, extreme offsets (Δv 8700 ± 1300 s−1) with respect to narrow emission lines. These no significant variation time lag ∼3.1 yr (rest frame). rule out possible interpretations based on superposition two sources or...
We present the main steps that will be taken to extract H$\alpha$ emission flux from Javalambre Photometric Local Universe Survey (J-PLUS) photometric data. For galaxies with $z\lesssim0.015$, H$\alpha$+[NII] is covered by J-PLUS narrow-band filter $F660$. explore three different methods + [NII] data: a combination of broad-band and ($r'$ $F660$), two one ($r'$, $i'$ SED-fitting based method using 8 points. To test these methodologies, we simulated data sample 7511 SDSS spectra measured...
ABSTRACT We estimate the constraining power of Javalambre-Physics Accelerated Universe Astrophysical Survey (J-PAS) for parameters an interacting dark energy (DE) cosmology. The survey is expected to map several millions luminous red galaxies, emission line and quasars in area thousands square degrees northern sky with precise photometric redshift measurements. Forecasts DESI Euclid surveys are also evaluated compared J-PAS. Using Fisher matrix approach, we find that J-PAS can place...
Throughout this paper we present a new method to detect and measure emission lines in J-PAS up $z = 0.35$. will observe $8000$~deg$^2$ of the northern sky upcoming years with 56 photometric bands. The release such amount data brings us opportunity employ machine learning methods order overcome difficulties associated data. We used Artificial Neural Networks (ANNs) trained tested synthetic photometry from CALIFA, MaNGA, SDSS spectra. carry out two tasks: firstly, cluster galaxies groups...
The next generation of galaxy surveys will allow us to test some fundamental aspects the standard cosmological model, including assumption a minimal coupling between components dark sector. In this paper, we present Javalambre Physics Accelerated Universe Astrophysical Survey (J-PAS) forecasts on class unified models where cold matter interacts with vacuum energy, considering future observations baryon acoustic oscillations, redshift-space distortions, and power spectrum. After providing...
We present the updated photometric calibration of twelve optical passbands for Javalambre Photometric Local Universe Survey (J-PLUS) second data release (DR2), comprising 1088 pointings two square degrees, and study systematic impact metallicity in stellar locus technique. The [Fe/H] from LAMOST DR5 146184 high-quality stars, defined with S/N > 10 J-PLUS 3 Gaia parallax, was used to compute metallicity-dependent (ZSL). initial homogenization photometry, performed a unique locus, refined by...
In this series of papers, we employ several machine learning (ML) methods to classify the point-like sources from miniJPAS catalogue, and identify quasar candidates. Since no representative sample spectroscopically confirmed exists at present train these ML algorithms, rely on mock catalogues. first paper develop a pipeline compute synthetic photometry quasars, galaxies stars using spectra objects targeted as quasars in Sloan Digital Sky Survey. To match same depths signal-to-noise ratio...
In this work we analyze the physical properties of a sample 56 spectroscopically selected star-forming (SF) Ly$\alpha$ emitting galaxies at 2.0$\lesssim$z$\lesssim$3.5 using both spectral energy distribution (SED) fitting procedure from rest-frame UV to mid-IR and direct 160$\mu$m observations taken with Photodetector Array Camera & Spectrometer (PACS) instrument onboard \emph{Herschel Space Observatory}. We define LAEs as those whose equivalent widths (Ly$\alpha$ EW$_{rest-frame}$) are...
In the present paper we aim to validate a methodology designed extract Halpha emission line flux from J-PLUS photometric data. is multi narrow-band filter survey carried out with 2 deg2 field of view T80Cam camera, mounted on JAST/T80 telescope in OAJ, Teruel, Spain. The information twelve bands, including J0660 located at rest-frame Halpha, used over 42 de-reddened and [NII] decontaminated fluxes 46 star-forming regions previous SDSS and/or CALIFA spectroscopic information. agreement...
The spatial variations of stellar population properties within a galaxy are intimately related to their formation process. Therefore, spatially resolved studies galaxies essential uncover and assembly. Javalambre Photometric Local Universe Survey (J-PLUS) is dedicated multi-filter designed observed ~8500 deg2 using twelve narrow-, intermediate- broad-band filters in the optical range. In this study, we test potential observation carried out with J-PLUS investigate spatially-resolved nearby...