Two phase formation of massive elliptical galaxies : study through cross-correlation including spatial effect

Abstract

Formation mechanism of present day population of elliptical galaxies have been revisited in the context of hierarchical cosmological models accompanied by accretion and minor mergers through cross correlation function including spatial effect. The present work investigates the formation and evolution of several components of nearby massive early type galaxies (ETGs) through cross-correlation in the spatial coordinates, right ascension and declination (RA, DEC) and mass-size parameter space with high redshift $(0.5\le z\le 2.7)$ ETGs. It is found that innermost components of nearby ETGs are highly correlated with ETGs in the redshift range $(2\le z\le 2.7)$ known as 'red nuggets'. The intermediate and outermost parts have moderate correlations with ETGs in the redshift range $(0.5\le z\le 0.75)$. The quantitative measures are highly consistent with the two phase formation scenario of massive nearby early type galaxies as suggested by various authors and resolves the conflict raised in a previous work suggesting other possibilities for the formation of outermost part of nearby massive ETGs. The improvement is expected to be due to inclusion of spatial effects in addition to other linear parameters.

27 pages, 9 figures, Accepted for publication in Astrophysics & Space Science

References in corpus (17)

• The hierarchical formation of the brightest cluster galaxies
• Kernel methods in machine learning
• Formation of Massive Galaxies at High Redshift: Cold Streams, Clumpy Disks and Compact Spheroids
• Size evolution of the most massive galaxies at 1.7<z<3 from GOODS NICMOS survey imaging
• Forming Compact Massive Galaxies
• Galaxy growth in the concordance $\Lambda$CDM cosmology
• The Majority of Compact Massive Galaxies at z~2 are Disk Dominated
• Dynamical masses of early-type galaxies at z~2: Are they truly superdense?
• The Carnegie-Irvine Galaxy Survey. III. The Three-Component Structure of Nearby Elliptical Galaxies
• The diverse evolutionary paths of simulated high-z massive, compact galaxies to z=0
• Hiding in plain sight: An abundance of compact massive spheroids in the local Universe
• The fate of high-redshift massive compact galaxies
• Star formation and figure rotation in the early-type galaxy NGC2974
• Delayed triggering of radio Active Galactic Nuclei in gas-rich minor mergers in the local Universe
• On the cross-correlation of sub-mm sources and optically-selected galaxies
• Mergers and Star Formation: The environment and Stellar Mass Growth of the Progenitors of Ultra-Massive Galaxies since z = 2
• Clustering of Gamma-Ray bursts through kernel principal component analysis

Cited by in corpus (10)

• Unsupervised classification of eclipsing binary light curves through k-medoids clustering
• A new measure for assessment of clustering based on kernel density estimation
• Distinction of groups of gamma-ray bursts in the BATSE catalog through fuzzy clustering
• Clustering of eclipsing binary light curves through functional principal component analysis
• A new nonparametric interpoint distance-based measure for assessment of clustering
• A new interpoint distance-based clustering algorithm using kernel density estimation
• Evaluation of the number of clusters in a data set using $p$-values from Multiple Tests of Hypotheses
• Confirmation of Binary Clustering in Gamma-Ray Bursts through an Integrated $p$-value from Multiple Nonparametric Tests of Hypotheses
• The Color Gradients of the Globular Cluster Systems in M87 and M49
• Bivariate density estimation using normal-gamma kernel with application to astronomy