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Revisiting the SFR-Mass relation at z=0 with detailed deep learning based morphologies
Helena Domínguez Sánchez, Mariangela Bernardi, Marc Huertas-Company
Galaxy morphology is a key parameter in galaxy evolution studies. The enormous number of galaxies which current and future surveys will observe demand of automated methods for morp…
Stellar population analysis of MaNGA early-type galaxies: IMF dependence and systematic effects
M. Bernardi, H. Dominguez Sanchez, R. K. Sheth +2
We study systematics associated with estimating simple stellar population (SSP) parameters -- age, metallicity [M/H], -enhancement [/Fe] and IMF shape -- and associated $M_*/…
Lessons Learned from the Two Largest Galaxy Morphological Classification Catalogues built by Convolutional Neural Networks
Ting-Yun Cheng, H. Domínguez Sánchez, J. Vega-Ferrero +54
We compare the two largest galaxy morphology catalogues, which separate early and late type galaxies at intermediate redshift. The two catalogues were built by applying supervised…
Coincidence between morphology and star-formation activity through cosmic time: the impact of the bulge growth
Paola Dimauro, Emanuele Daddi, Francesco Shankar +10
The origin of the quenching in galaxies is still highly debated. Different scenarios and processes are proposed. We use multi-band (400-1600 nm) bulge-disc decompositions of massiv…
The Seventeenth Data Release of the Sloan Digital Sky Surveys: Complete Release of MaNGA, MaStar and APOGEE-2 Data
Abdurro'uf, Katherine Accetta, Conny Aerts +337
This paper documents the seventeenth data release (DR17) from the Sloan Digital Sky Surveys; the fifth and final release from the fourth phase (SDSS-IV). DR17 contains the complete…
The half mass radius of MaNGA galaxies: Effect of IMF gradients
M. Bernardi, R. K. Sheth, H. Dominguez Sanchez +3
Gradients in the stellar populations (SP) of galaxies -- e.g., in age, metallicity, stellar Initial Mass Function (IMF) -- can result in gradients in the stellar mass to light rati…
The weak dependence of velocity dispersion on disk fractions, mass-to-light ratio and redshift: Implications for galaxy and black hole evolution
Christopher Marsden, Francesco Shankar, Mariangela Bernardi +3
Velocity dispersion () is a key driver for galaxy structure and evolution. We here present a comprehensive semi-empirical approach to compute via detailed Jeans modelling as…
SDSS-IV DR17: Final Release of MaNGA PyMorph Photometric and Deep Learning Morphological Catalogs
H. Domínguez Sánchez, B. Margalef, M. Bernardi +1
We present the MaNGA PyMorph photometric Value Added Catalogue (MPP-VAC-DR17) and the MaNGA Deep Learning Morphological VAC (MDLM-VAC-DR17) for the final data release of the MaNGA…
SDSS-IV MaNGA: drivers of stellar metallicity in nearby galaxies
Justus Neumann, Daniel Thomas, Claudia Maraston +12
The distribution of stellar metallicities within and across galaxies is an excellent relic of the chemical evolution across cosmic time. We present a detailed analysis of spatially…
The size function of massive satellites from the and relations: constraining the role of environment
Lorenzo Zanisi, Francesco Shankar, Mariangela Bernardi +2
In previous work we showed that a semi-empirical model in which galaxies in host dark matter haloes are assigned stellar masses via a stellar mass-halo mass (SMHM) relation and siz…
On the Presence of a Universal Acceleration Scale in Elliptical Galaxies
Kyu-Hyun Chae, Mariangela Bernardi, Helena Dominguez Sanchez +1
Dark matter phenomena in rotationally supported galaxies exhibit a characteristic acceleration scale of m s. Whether this acceleration…
Galaxy properties as revealed by MaNGA. III. Kinematic profiles and stellar population gradients in S0s
H. Domínguez Sánchez, M. Bernardi, F. Nikakhtar +2
This is the third paper of a series where we study the stellar population gradients (SP; ages, metallicities, -element abundance ratios and stellar initial mass functions) of ea…
The Stellar Mass Fundamental Plane: The virial relation and a very thin plane for slow-rotators
M. Bernardi, H. Domínguez Sanchez, B. Margalef-Bentabol +2
Early-type galaxies -- slow and fast rotating ellipticals (E-SRs and E-FRs) and S0s/lenticulars -- define a Fundamental Plane (FP) in the space of half-light radius , enclosed…
Detecting outliers in astronomical images with deep generative networks
Berta Margalef-Bentabol, Marc Huertas-Company, Tom Charnock +5
With the advent of future big-data surveys, automated tools for unsupervised discovery are becoming ever more necessary. In this work, we explore the ability of deep generative net…
Probing black hole accretion tracks, scaling relations and radiative efficiencies from stacked X-ray active galactic nuclei
Francesco Shankar, David H. Weinberg, Christopher Marsden +25
The masses of supermassive black holes at the centres of local galaxies appear to be tightly correlated with the mass and velocity dispersions of their galactic hosts. However, the…
Galaxy sizes and the galaxy-halo connection -- I: the remarkable tightness of the size distributions
Lorenzo Zanisi, Francesco Shankar, Andrea Lapi +6
The mass and structural assembly of galaxies is a matter of intense debate. Current theoretical models predict the existence of a linear relationship between galaxy size () an…
Constraining black hole-galaxy scaling relations from the large-scale clustering of Active Galactic Nuclei and implied mean radiative efficiency
Francesco Shankar, Viola Allevato, Mariangela Bernardi +11
A supermassive black hole has been found at the centre of nearly every galaxy observed with sufficient sensitivity. The masses of these black holes are observed to increase with ei…
Galaxy properties as revealed by MaNGA II. Differences in stellar populations of slow and fast rotator ellipticals and dependence on environment
M. Bernardi, H. Domínguez Sánchez, J. R. Brownstein +2
We present estimates of stellar population (SP) gradients from stacked spectra of slow (SR) and fast (FR) rotator elliptical galaxies from the MaNGA-DR15 survey. We find that: 1) F…
Galaxy properties as revealed by MaNGA. I. Constraints on Initial Mass Function and M/L gradients in ellipticals
H. Domínguez Sánchez, M. Bernardi, J. R. Brownstein +2
We estimate ages, metallicities, -element abundance ratios and stellar initial mass functions of elliptical (E) and S0 galaxies from the MaNGA-DR15 survey. We stack spectra and…
The Hubble Sequence at in the IllustrisTNG simulation with deep learning
M. Huertas-Company, V. Rodriguez-Gomez, D. Nelson +7
We analyze the optical morphologies of galaxies in the IllustrisTNG simulation at with a Convolutional Neural Network trained on visual morphologies in the Sloan Digital S…
Modeling Nearly Spherical Pure-Bulge Galaxies with a Stellar Mass-to-Light Ratio Gradient under the CDM and MOND Paradigms: II. The Orbital Anisotropy of Slow Rotators within the Effective Radius
Kyu-Hyun Chae, Mariangela Bernardi, Ravi K. Sheth
We investigate the anisotropy of the stellar velocity dispersions within the effective radius, , in 24 ATLAS pure-bulge galaxies, 16 of which are kinematic sl…
The structural properties of classical bulges and discs from z~2
Paola Dimauro, Marc Huertas-Company, Emanuele Daddi +19
We study the rest-frame optical mass-size relation of bulges and discs from z~2 to z~0 for a complete sample of massive galaxies in the CANDELS fields using 2 component Sérsic mode…
Black hole scaling relations of active and quiescent galaxies: Addressing selection effects and constraining virial factors
Francesco Shankar, Mariangela Bernardi, Kayleigh Richardson +9
Local samples of quiescent galaxies with dynamically measured black hole masses (Mbh) may suffer from an angular resolution-related selection effect, which could bias the observed…
SDSS-IV MaNGA PyMorph Photometric and Deep Learning Morphological Catalogs and implications for bulge properties and stellar angular momentum
J. -L. Fischer, H. Domínguez Sánchez, M. Bernardi
We describe the SDSS-IV MaNGA PyMorph Photometric (MPP-VAC) and MaNGA Deep Learning Morphology (MDLM-VAC) Value Added Catalogs. The MPP-VAC provides photometric parameters from Sér…