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SDSS-IV MaNGA: Cannibalism Caught in the Act -- on the Frequency of Occurrence of Multiple Cores in Brightest Cluster Galaxies
Yun-Hsin Hsu, Yen-Ting Lin, Song Huang +16
Although it is generally accepted that massive galaxies form in a two-phased fashion, beginning with a rapid mass buildup through intense starburst activities, followed by primaril…
A machine learning approach to infer the accreted stellar mass fractions of central galaxies in the TNG100 simulation
Rui Shi, Wenting Wang, Zhaozhou Li +5
We propose a random forest (RF) machine learning approach to determine the accreted stellar mass fractions () of central galaxies, based on various dark matter halo…
Galaxy Formation in the Santa Cruz semi-analytic model compared with IllustrisTNG -- I. Galaxy scaling relations, dispersions, and residuals at z=0
Austen Gabrielpillai, Rachel S. Somerville, Shy Genel +4
We present the first results from applying the Santa Cruz semi-analytic model (SAM) for galaxy formation on merger trees extracted from a dark matter only version of the IllustrisT…
The building up of observed stellar scaling relations of massive galaxies and the connection to black hole growth in the TNG50 simulation
S. Varma, M. Huertas-Company, A. Pillepich +7
[abridged] We study how mock-observed stellar morphological and structural properties of massive galaxies are built up between and in the TNG50 cosmological simulatio…
Lower-Luminosity Obscured AGN Host Galaxies are Not Predominantly in Major-Merging Systems at Cosmic Noon
Erini Lambrides, Marco Chiaberge, Timothy Heckman +15
For over 60 years, the scientific community has studied actively growing central super-massive black holes (active galactic nuclei -- AGN) but fundamental questions on their genesi…
ZFIRE: The Beginning of the End for Massive Galaxies at z ~ 2 and Why Environment Matters
Anishya Harshan, Anshu Gupta, Kim-Vy Tran +6
We use ZFIRE and ZFOURGE observations with the Spectral Energy Distribution (SED) fitting tool Prospector to reconstruct the star formation histories (SFHs) of proto-cluster and fi…
Anisotropic satellite galaxy quenching modulated by supermassive black hole activity
Ignacio Martín-Navarro, Annalisa Pillepich, Dylan Nelson +4
The evolution of satellite galaxies is shaped by their constant interaction with the circum galactic medium surrounding central galaxies, which in turn may be affected by gas and e…
The abundance of satellites around Milky Way- and M31-like galaxies with the TNG50 simulation: a matter of diversity
Christoph Engler, Annalisa Pillepich, Anna Pasquali +9
We study the abundance of satellite galaxies around 198 Milky Way- (MW) and M31-like hosts in TNG50, the final instalment in the IllustrisTNG suite of cosmological magnetohydrodyna…