A5060636996- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Adaptive optics and wavefront sensing
- Remote Sensing in Agriculture
- Astronomical Observations and Instrumentation
- Astrophysics and Star Formation Studies
- Advanced Vision and Imaging
- Gamma-ray bursts and supernovae
- Advanced Image Processing Techniques
- Plant Water Relations and Carbon Dynamics
- Calibration and Measurement Techniques
- Remote Sensing and LiDAR Applications
- CCD and CMOS Imaging Sensors
- Astrophysics and Cosmic Phenomena
- Computational Geometry and Mesh Generation
- Spectroscopy and Laser Applications
- 3D Surveying and Cultural Heritage
University of Vienna
2023-2024
Instituto de Astrofísica de Andalucía
2021-2024
Institute of Astrophysics and Space Sciences
2015-2021
Centre for Astrophysics of the University of Porto
2015-2021
University of Lisbon
2020-2021
Universidade do Porto
2017-2020
The morphological, spectroscopic and kinematical properties of the warm interstellar medium (wim) in early-type galaxies (ETGs) hold key observational constraints to nuclear activity buildup history these massive, quiescent systems. High-quality integral field spectroscopy (IFS) data with a wide spectral spatial coverage, such as those from CALIFA survey, offer an unprecedented opportunity for advancing our understanding wim ETGs. This article centers on 2D investigation component 32 nearby...
Based on a combined analysis of SDSS imaging and CALIFA integral field spectroscopy data, we report the detection faint (24 <μr mag/□″< 26) star-forming spiral-arm-like features in periphery three nearby early-type galaxies (ETGs). These are considerable interest because they document still ongoing inside-out growth some local ETGs may add valuable observational insight into origin evolution spiral structure triaxial stellar systems. A characteristic property nebular component studied ETGs,...
Integral field spectroscopy studies based on CALIFA data have recently revealed the presence of ongoing low-level star formation (SF) in periphery ~10% local early-type galaxies (ETGs), witnessing a still inside-out galaxy growth process. A distinctive property nebular component these ETGs, classified i+, is two-radial-zone structure, with inner zone displaying LINER emission H\alpha equivalent width EW~1{\AA}, and outer one (3{\AA}<EW<~20{\AA}) showing HII-region characteristics. Using IFS...
(abridged) This study revolves around dmB, a new distance- and extinction-independent measure of the contribution by stellar populations older than 9 Gyr to mean r-band surface brightness bulge component in 135 late-type galaxies (LTGs) from CALIFA survey, spanning range 2.6 dex 3 total mass (M*T~10^(8.9-11.5) M_solar M*B~10^(8.3-11.3) M_solar, respectively). The main insight this is that LTG bulges form continuous sequence increasing dmB with M*T, M*B, density S* mass-weighted age...
Radial age gradients hold the cumulative record of multitude physical processes driving build-up stellar populations and ensuing star formation (SF) quenching process in galaxy bulges, therefore potentially sensitive discriminators between competing theoretical concepts on bulge evolution. Based spectral modeling integral field spectroscopy data from CALIFA survey, we derive mass- light-weighted ($\nabla$(t,B)L,M) within photometrically determined radius (RB) a representative sample local...
Since the k correction depends on spectral energy distribution (SED) of a galaxy, any high-z galaxy with spatially non-homogeneous SED will experience varying relative dimming or brightening in addition to pure distance effect. The morphology galaxies therefore change z. For instance, an early spiral observed V band would show prominent bulge at z=0, whereas, if z=1, filter probes rest-frame near-UV where is faint and disk relatively brighter, thus may appear as bulgeless. strong nebular...
(abridged) A fundamental subject in Extragalactic Astronomy concerns the formation and evolution of late-type galaxies (LTGs). The standard scenario comprises early assembly bulge followed by disk accretion. However, recent observational evidence points to a joint perpetual co-evolution these structural components. Our current knowledge on properties is mostly founded photometric decomposition studies, which sensitively depend adopted methodology enclosed assumptions structure LTGs. critical...
Context. Galaxies with extreme emission lines (EELGs) may play a key role in the evolution of Universe, as well our understanding star formation process itself. For this reason an accurate determination their spatial density and fundamental properties different epochs Universe will constitute unique perspective towards comprehensive picture interplay between mass assembly galaxies. In addition to this, EELGs are also interesting order explain reionization since interstellar medium (ISM)...
Context. The most massive galaxies ( M stellar ≥ 10 11 ⊙ ) in the local Universe are characterized by a bulge-dominated morphology and old populations, addition to being confined tight mass-size relation. Identifying their main components can provide insights into formation mechanisms subsequent mass assembly. Aims. Taking advantage of Hubble Space Telescope (HST) CANDELS data, we analyze lowest redshift z < 0.5) H I band order disentangle structural constituents study possible faint...
Extreme emission line galaxies (EELGs) are a notable galaxy genus, ultimately being regarded as local prototypes of early at the cosmic noon. Robust characterisation their stellar content, however, is hindered by exceptionally high nebular present in optical spectroscopic data. This study dedicated into recovering properties sample 414 EELGs observed SDSS Survey. Such achieved means spectral synthesis code F ADO , which self-consistently considers and an spectrum. Additionally, comparative...
Our knowledge about the photometric and structural properties of bulges in late-type galaxies (LTGs) is founded upon image decomposition into a Sérsic model for central luminosity excess bulge an exponential more extended underlying disk. We argue that standard practice adopting disk all way to its center inadequate because it implicitly neglects fact star formation (SF) quenching centers LTGs. Extrapolating fit observable star-forming zone (outside bulge) inwardly overestimates true surface...
The field of galaxy evolution will make a great leap forward in the next decade as consequence huge effort by scientific community multi-object spectroscopic facilities. To maximise impact such incoming data, analysis methods must also step up, extracting reliable information from available spectra. In this paper, we aim to investigate limits and reliability different spectral synthesis estimation mean stellar age metallicity. main question work aims address is which signal-to-noise ratios...
Context. The Sérsic law ( SL ) offers a versatile, widely used functional form for the structural characterization of galaxies near and far. Whereas fitting this three-parameter function to with genuine luminosity distribution (e.g., several local early-type galaxies–ETGs) yields robust determination exponent η effective surface brightness μ eff , is not necessarily case whose profiles (SBPs) appreciably deviate, either in their centers or over an extended radius interval, from ETGs...
Green Pea galaxies (GPs) present among the most intense starbursts known in nearby Universe. These are regarded as local analogs of high-redshift galaxies, making them a benchmark understanding star formation processes and galactic evolution early In this work, we performed an integral field spectroscopic (IFS) study for set 24 GPs to investigate interplay between its ionized interstellar medium (ISM) massive that these present. Observations were taken optical spectral range ( λ 4750 Å– 9350...
A tantalizing enigma in extragalactic astronomy concerns the chronology and driving mechanisms of build-up late-type galaxies (LTGs). The standard scenario envisages two formation routes, with classical bulges (CBs) assembling first a quick quasi-monolithic episode followed by gradual disk assembly, pseudo-bulges (PBs) forming over Gyr-long secular evolution LTGs. expectation is, therefore, segregation present-day LTG into distinct groups. Here we analyse star histories (SFHs) disks for 135...
ABSTRACT Extreme Emission Line Galaxies (EELGs) stand as remarkable objects due to their extremely metal poor environment and intense star formation. Considered local analogues of high-redshift galaxies in the peak star-forming activity, they offer insights into conditions prevalent during early Universe. Assessment stellar gas properties is therefore critical importance, which requires assembly a considerable sample, comprehending broad redshift range. The Javalambre-Physics Accelerating...
Extreme Emission Line Galaxies (EELGs) stand as remarkable objects due to their extremely metal poor environment and intense star formation. Considered local analogues of high-redshift galaxies in the peak star-forming activity, they offer insights into conditions prevalent during early Universe. Assessment stellar gas properties is, therefore, critical importance, which requires assembly a considerable sample, comprehending broad redshift range. The Javalambre-Physics Accelerating Universe...
The processes driving the formation and evolution of late-type galaxies (LTGs) continue to be a debated subject in extragalactic astronomy. Investigating stellar kinematics, especially when combined with age estimates, provides crucial insights into subsequent development galactic discs. Post-processing exceptionally high-quality Integral Field Spectroscopy (IFS) data NGC 4030 acquired Multi Unit Spectroscopic Explorer (MUSE), clearly reveals striking grand design spiral pattern velocity...
The processes driving the formation and evolution of late-type galaxies continue to be a debated subject in extragalactic astronomy. Investigating stellar kinematics, especially when combined with age estimates, provides crucial insights into subsequent development galactic discs. Post-processing exceptionally high-quality integral field spectroscopy data NGC 4030 acquired Multi Unit Spectroscopic Explorer (MUSE) has revealed striking grand design spiral pattern velocity dispersion map, that...
Since the k correction depends on spectral energy distribution (SED) of a galaxy, any high-z galaxy with spatially non-homogeneous SED will experience varying relative dimming or brightening in addition to pure distance effect. The morphology galaxies therefore change z. For instance, an early spiral observed V band would show prominent bulge at z=0, whereas, if z=1, filter probes rest-frame near-UV where is faint and disk relatively brighter, thus may appear as bulgeless. strong nebular...