Galaxy structural analysis with the curvature of the brightness profile

Lucatelli, Geferson; Ferrari, Fabrício

doi:10.1093/mnras/stz2154

Cited by 14 publications

(16 citation statements)

References 103 publications

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“…In this work we present preliminary results of the study of galaxy morphology and stellar population properties obtained using data of the S-PLUS survey. We show how the parameters recovered with MFMTK allow to perform a galaxy morphological classification and we suggest a way to identify S0 galaxies, combining such parameters with a novel method based on the study of the curvature of the galaxies' surface light profile (Lucatelli & Ferrari 2019). The S-PLUS data set, given its unique combination of narrow and broad band filters, allows the estimation of the galaxy most probable stellar template, together with the definition of its morphometric parameters.…”

Section: Discussionmentioning

confidence: 99%

S-PLUS: LEnticular Galaxies in Stripe 82 (LEGS82)

Cortesi

Saha

Ferrari

et al. 2021

An. Acad. Bras. Ciênc.

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This work is a Brazilian-Indian collaboration. It aims at investigating the structural properties of Lenticular galaxies in the Stripe 82 using a combination of S-PLUS (Southern Photometric Local Universe Survey) and SDSS data. S-PLUS is a novel optical multi-wavelength survey which will cover nearly 8000 square degrees of the Southern hemisphere in the next years and the first data release covers the Stripe 82 area. The morphological classification and study of the galaxies' stellar population will be performed combining the Bayesian Spectral type (from BPZ) and Morfometryka (MFMTK) parameters. BPZ and MFMTK are two complementary techniques, since the first one determines the most likely stellar population of a galaxy, in order to obtain its photometric redshift (phot-z), and the second one recovers non-parametric morphological quantities, such as asymmetries and concentration. The combination of the two methods allows us to explore the correlation between galaxies shapes (smooth, with spiral arms, etc.) and their stellar contents (old or young population). The preliminary results, presented in this work, show how this novel data set opens a new window on our understanding of the nearby universe.

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Section: Discussionmentioning

confidence: 99%

S-PLUS: LEnticular Galaxies in Stripe 82 (LEGS82)

Cortesi

Saha

Ferrari

et al. 2021

An. Acad. Bras. Ciênc.

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“…Interestingly, while for the spiral galaxy the B/T ratio increases with increasing wavelength, (i.e., the percentage of light associated with the bulge is higher in redder bands), in the early-type galaxy the bulge is slightly more prominent in bluer bands. Such techniques as the Kurvature method of Lucatelli & Ferrari (2019) allow for the structural multi-components of a galaxy to be to disentangled to give an indication of the transition regions and allow for the presence of other features to be inferred, such as bars and nuclear disks. These kind of measurements, together with the SED fitting of the J-spectra, will allow us to obtain a full picture of the build-up of galaxy structures (Cortesi et.…”

Section: Morphological Studies In Multi-colormentioning

confidence: 99%

The miniJPAS survey: A preview of the Universe in 56 colors

Bonoli

Marín-Franch

Varela

et al. 2021

A&A

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The Javalambre-Physics of the Accelerating Universe Astrophysical Survey (J-PAS) will scan thousands of square degrees of the northern sky with a unique set of 56 filters using the dedicated 2.55m JST at the Javalambre Astrophysical Observatory. Prior to the installation of the main camera (4.2 deg 2 field-of-view with 1.2 Gpixels), the JST was equipped with the JPAS-Pathfinder, a one CCD camera with a 0.3 deg 2 field-of-view and plate scale of 0.23 arcsec pixel −1 . To demonstrate the scientific potential of J-PAS, the JPAS-Pathfinder camera was used to perform miniJPAS, a ∼1 deg 2 survey of the AEGIS field (along the Extended Groth Strip). The field was observed with the 56 J-PAS filters, which include 54 narrow band (NB, FWHM ∼ 145 Å) and two broader filters extending to the UV and the near-infrared, complemented by the u, g, r, i SDSS broad band (BB) filters. In this miniJPAS survey overview paper, we present the miniJPAS data set (images and catalogs), as we highlight key aspects and applications of these unique spectro-photometric data and describe how to access the public data products. The data parameters reach depths of mag AB 22 − 23.5 in the 54 narrow band filters and up to 24 in the broader filters (5σ in a 3 aperture). The miniJPAS primary catalog contains more than 64, 000 sources detected in the r band and with matched photometry in all other bands. This catalog is 99% complete at r = 23.6 (r = 22.7) mag for point-like (extended) sources. We show that our photometric redshifts have an accuracy better than 1% for all sources up to r = 22.5, and a precision of ≤ 0.3% for a subset consisting of about half of the sample. On this basis, we outline several scientific applications of our data, including the study of spatially-resolved stellar populations of nearby galaxies, the analysis of the large scale structure up to z ∼ 0.9, and the detection of large numbers of clusters and groups. Sub-percent redshift precision can also be reached for quasars, allowing for the study of the large-scale structure to be pushed to z > 2. The miniJPAS survey demonstrates the capability of the J-PAS filter system to accurately characterize a broad variety of sources and paves the way for the upcoming arrival of J-PAS, which will multiply this data by three orders of magnitude. For reference, the miniJPAS data and associated value added catalogs are publicly available http://archive.cefca.es/catalogues/minijpas-pdr201912.

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“…In fact, some of the real galaxies used as observational constraints in this work seem to have more complex structures. For example, galaxies NGC 1270, NGC 0374, NGC 0472 and NGC 2767 were photometrically decomposed by Lucatelli & Ferrari (2019) based on the curvature of their light profiles, showing evidence for substructures -such as disks -in their inner regions. The simpler analysis done here already shows the two most important aspects regarding the light distribution: overall morphological resemblance between some subhalos in the simulation and some of the real relics, and discrepant light profile slopes in the inner regions (𝑅 < 1 kpc) of all simulated galaxies.…”

Section: Light Distributionmentioning

confidence: 99%

Relic galaxy analogues in Illustris TNG50: the formation pathways of surviving red nuggets in a cosmological simulation

Flores-Freitas,

Chies-Santos,

Furlanetto

et al. 2021

Preprint

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Relic galaxies are massive compact quiescent galaxies that formed at high-redshift and remained almost unchanged since then. In this work, we search for analogues to relic galaxies in the TNG50 cosmological simulations to understand relic formation and test the ability of TNG50 to reproduce such rare objects. Using stellar mass, age, radius, quiescence and stellar assembly criteria, we find 5 subhalos in TNG50 that could be potential relic analogues. We compare their properties with other constraints imposed by a sample of 13 observed relic galaxies. We find one analogue in TNG50 that simultaneously satisfies most of the available observational constraints, such as metallicity and morphology. It also shows similarities to the confirmed relic NGC 1277, regarding environment and dark matter fraction. By taking into account a degree of relicness, a second relic analogue may also be considered. However, the central parts of the brightness and density profiles of the analogues are less steep than that of real relic galaxies, possibly due to limited numerical resolution. We identify two formation pathways of relic analogues in TNG50 depending on their environment: they either have their remaining gas stripped during the infall into a cluster at 𝑧 1.2 or consume it before 𝑧 > 1.5. They are then deprived of significant star formation, leaving their stellar populations almost unaltered during the last 9 Gyr. We also find that the analogue progenitors at 𝑧 ∼ 4 inhabit more massive halos than progenitors of quiescent galaxies with similar stellar mass at 𝑧 ∼ 0.

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Galaxy structural analysis with the curvature of the brightness profile

Cited by 14 publications

References 103 publications

S-PLUS: LEnticular Galaxies in Stripe 82 (LEGS82)

S-PLUS: LEnticular Galaxies in Stripe 82 (LEGS82)

The miniJPAS survey: A preview of the Universe in 56 colors

Relic galaxy analogues in Illustris TNG50: the formation pathways of surviving red nuggets in a cosmological simulation

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