A5042753521- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Astronomical Observations and Instrumentation
- Astrophysics and Star Formation Studies
- Spectroscopy and Laser Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Gamma-ray bursts and supernovae
- CCD and CMOS Imaging Sensors
Universidad de Granada
2023-2024
Heidelberg University
2020-2023
Alzahra University
2016
We report, for the first time, detection of a sample quenched and isolated dwarf galaxies (with 8.9 $<$ log(M$_{\rm \star}$/M$_{\rm \odot}$) 9.5) in least dense regions cosmic web, including voids, filaments, walls. These dwarfs have no neighbouring galaxy within 1.0~Mpc projected distance. Based on full spectral fitting their central spectra using Sloan Digital Sky Survey data, these are gas-deprived, exhibit stellar mass assembly very similar to clusters, experienced significant star...
We report, for the first time, detection of a sample quenched and isolated dwarf galaxies (with 8.9 $<$ log(M_ ⋆/M_ ⊙) 9.5) in least dense regions cosmic web, including voids, filaments, walls. These dwarfs have no neighboring galaxy within 1.0 Mpc projected distance. Based on full spectral fitting their central spectra using Sloan Digital Sky Survey data, these are gas-deprived, while also exhibiting stellar mass assembly very similar to clusters. Furthermore, they experienced...
Field dwarf galaxies not actively forming stars are relatively rare in the local Universe, but present cosmological hydrodynamical simulations. We use TNG50 simulation to investigate their origin and find that they all result from environmental effects have removed or reduced gas content. Quenched field dwarfs consist of either backsplash objects ejected a massive host systems lost after crossing overdense regions such as filaments sheets (``cosmic web stripping''). fractions rise steeply...
Context. The mass-size relation is a fundamental galaxy scaling that intrinsically linked to formation and evolution. physical processes involved in growth leave their particular imprint on the between stellar or total mass size. Aims. We aim explore effect of large-scale environment using samples selection added-value products from Calar Alto Void Integral-field Treasury surveY (CAVITY) collaboration. Methods. analysed Petrosian R50 R90 radii SDSS DR16 images sample ≈14 000 galaxies...
The Universe is shaped as a web-like structure, formed by clusters, filaments, and walls that leave large volumes in between named voids. Galaxies voids have been found to be of later type, bluer, less massive, slower evolution than galaxies denser environments (filaments walls). However, the effect void environment on their stellar population properties still unclear. We aim address this question using 118 optical integral field unit datacubes from Calar Alto Void Integral-field Treasury...
We have learnt in the last decades that majority of galaxies belong to high density regions interconnected a sponge-like fashion. This large-scale structure is characterised by clusters, filaments, and walls, where most concentrate, but also under-dense called voids. The void within represent an ideal place for study galaxy formation evolution, as they are largely unaffected complex physical processes transform high-density environments. may hold key answer current challenges Lambda CDM...
Context. Void galaxies are essential for understanding the physical processes that drive galaxy evolution because they less affected by external factors than in denser environments, is, filaments, walls, and clusters. The stellar metallicity of a traces accumulated fossil record star formation through entire life galaxy. A comparison various including voids, clusters can provide valuable insights into how large-scale environment affects chemical Aims. We present first relation total mass...
Galaxy environment has been shown to play an important role in transforming late-type, star-forming galaxies quiescent spheroids. This transformation is expected be more severe for low-mass (M < $10^{10}$ \(M_\odot\)) dense galaxy groups and clusters, mostly due the influence of their past host halos (also known as pre-processing) present-day environments. For first time, this study, we investigate a sample nine early-type dwarf (dEs) that were accreted likely bound group onto Virgo cluster...
Using MUSE spectra, we investigate how pre-processing and accretion onto a galaxy cluster affect the integrated stellar population properties of dwarf early-type galaxies (dEs). We analyze sample nine dEs with masses $\rm \sim 10^9 \, M_\odot$, which were accreted ($\sim$ 2-3 Gyr ago) Virgo as members massive group. derive their properties, namely age, metallicity ([M/H]), abundance ratio $\alpha$ elements ([$\alpha$/Fe]), by fitting observed spectral indices robust, iterative procedure,...
ABSTRACT Using MUSE data, we investigate the radial gradients of stellar population properties (namely age, [M/H], and abundance ratio α elements [α/Fe]) for a sample nine dwarf early-type (dE) galaxies with log(M⋆/M⊙) ∼ 9.0 an infall time onto Virgo cluster 2–3 Gyr ago. We followed similar approach as in Bidaran et al. to derive their star formation histories (SFHs) through fitting observed spectral indices full fitting, respectively. find that these dE have truncated [Mg/Fe] versus [Fe/H]...
Cosmic voids, distinguished by their low-density environment, provide a unique opportunity to explore the interplay between cosmic environment and processes of galaxy formation evolution. Nevertheless, few data on molecular gas have been obtained so far. In this paper, we continue research performed in CO-CAVITY pilot project study content properties void galaxies order search for possible differences compared that inhabit denser structures. We used IRAM 30\,m telescope observe CO(1--0)...
We introduce a new colour index consisting of two spectral bandwidths to measure the titanium oxide (TiO) absorption band strength centred at 567 nm. Based on most up-to-date line list for TiO, we regenerate grid synthesized spectra and investigate temperature sensitivity index. The behaves similarly older TiO Wing, in that it decreases monotonically from coolest atmosphere with Teff = 2800 up 4000 where molecules disassociate. To further examine feasibility index, reproduce calibration...
The Universe is shaped as a web-like structure, formed by clusters, filaments, and walls that leave large low number-density volumes in between named voids. Galaxies voids have been found to be of later type, bluer, less massive, slower evolution than galaxies denser environments (filaments walls). However, the effect void environment on their stellar population properties still unclear. We aim address this question using 118 optical integral field unit datacubes from Calar Alto Void...
We have learnt in the last decades that majority of galaxies belong to high density regions interconnected a sponge-like fashion. This large-scale structure is characterised by clusters, filaments, walls, where most concentrate, but also under-dense regions, called voids. The void and within represent an ideal place for study galaxy formation evolution as they are largely unaffected complex physical processes transform high-density environments. These can hold key well answer current...
The Calar Alto Void Integral-field Treasury surveY (CAVITY) is a legacy project aimed at characterising the population of galaxies inhabiting voids, which are most under-dense regions cosmic web, located in Local Universe. This paper describes first public data release (DR1) CAVITY, comprising science-grade optical cubes for initial 100 out total ~300 Universe (0.005 < z 0.050). These were acquired using integral-field spectrograph PMAS/PPak mounted on 3.5m telescope observatory. DR1...
Context. The specific environment of galaxies may play a key role in their evolution. Large extragalactic surveys make it possible to study not only within local environment, but also the large-scale structure Universe. Aims. We aim investigate how influences star formation history (SFH) across range environments. Methods. categorised sample 9384 into three primary structures (voids, walls and filaments, clusters). further classified them based on (as either ‘singlets’ or group members)...
We aim to investigate how the local environment influences star formation history (SFH) of galaxies residing in various large-scale environments. categorise a sample 9384 into three primary large scale structures (voids, walls \& filaments, and clusters) further classify them based on their (as either "singlets" or group members), through search companion within sky-projected distances $\Delta r_p < 0.45$ Mpc velocity differences v 160$ $\text{km s}^{-1}$. Subsequently, we explore these...
We present the analysis using pyPipe3D of a sample 208 galaxies from CAVITY project , that includes: (i) description processes performed by this pipeline, (ii) data model adopted to store spatially resolved properties, and (iii) catalog comprising integrated characteristics slope radial gradients for various observational physical parameters determined each galaxy. elucidate outcomes presenting spatial distribution derived representative galaxy, CAVITY66239, exploring extensive intensive...
Cosmic voids, distinguished by their low-density environment, provide a unique opportunity to explore the interplay between cosmic environment and processes of galaxy formation evolution. Data on molecular gas has been scarce so far. In this paper, we continue previous research done in CO-CAVITY pilot project study content properties void galaxies search for possible differences compared that inhabit denser structures. We observed at IRAM 30 m telescope CO(1-0) CO(2-1) emission 106 selected...
Using MUSE data, we investigate the radial gradients of stellar population properties (namely age, [M/H], and abundance ratio $\alpha$ elements [$\alpha$/Fe]) for a sample nine dwarf early-type (dE) galaxies with log(M$_{\star}$/M$_{\odot}$) $\sim$ 9.0 an infall time onto Virgo cluster 2-3Gyr ago. We followed similar approach as in Bidaran et al. (2022) to derive their star formation histories (SFHs) through fitting observed spectral indices full fitting, respectively. find that these dE...
Void galaxies are essential for understanding the physical processes that drive galaxy evolution because they less affected by external factors than in denser environments, is, filaments, walls, and clusters. The stellar metallicity of a traces accumulated fossil record star formation through entire life galaxy. A comparison various including voids, clusters can provide valuable insights into how large-scale environment affects chemical We present first relation total mass versus central...
Using MUSE spectra, we investigate how pre-processing and accretion onto a galaxy cluster affect the integrated stellar population properties of dwarf early-type galaxies (dEs). We analyze sample nine dEs with masses $\rm \sim 10^9 \, M_\odot$, which were accreted ($\sim$ 2-3 Gyr ago) Virgo as members massive group. derive their properties, namely age, metallicity ([M/H]), abundance ratio $α$ elements ([$α$/Fe]), by fitting observed spectral indices robust, iterative procedure, infer star...