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Dusty Star Formation in Extreme Environments: Galaxies and Galaxy Clusters in the Distant Universe
high-redshift galaxy clusters infrared environment Herschel
2014/12/9
In this thesis, we present a comprehensive study of the dust-obscured star formation (SF) activity in galaxy clusters out to high redshift using infrared (IR) imaging. Using hundreds of galaxy cluster...
The Resolved Structure and Dynamics of an Isolated Dwarf Galaxy: A VLT and Keck Spectroscopic Survey of WLM
Resolved Structure Dynamics Isolated Dwarf Galaxy VLT Keck Spectroscopic Survey WLM
2012/2/23
We present spectroscopic data for 180 red giant branch stars in the isolated dwarf irregular galaxy WLM. Observations of the Calcium II triplet lines in spectra of RGB stars covering the entire galaxy...
A Relic Star Cluster in the Sextans Dwarf Spheroidal Galaxy - Implications for Early Star and Galaxy Formation
Relic Star Cluster the Sextans Dwarf Spheroidal Galaxy Implications Galaxy Formation
2012/2/23
We present tentative evidence for the existence of a dissolved star cluster in the Sextans dwarf spheroidal galaxy. In a sample of six stars, we identify three (possibly four) stars around [Fe/H] =-2....
Advanced Morphological Galaxy Classification: A Comparison of Real and Simulated Galaxies
galaxies: structure — galaxies: evolution — methods: numerical
2011/10/18
Encoded within the morphological structure of galaxies are clues related to their formation and evolutionary history. Recent advances pertaining to the statistics of galaxy morphology include sophisti...
Young stellar groups in M 33 galaxy: delineation and main parameters
Young stellar groups in M 33 galaxy: delineation and main parameters
2011/10/18
The problem of (non-)existence of a typical size of the stellar associations is revisited by use of deep UBVRI stellar CCD photometry in M 33 from the Local Group Survey (Massey et al. 2006). We compa...
Two generations in stellar complexes and associations in M 33 galaxy and their spatial correlation
generations stellar complexes associations galaxy spatial correlation
2011/10/18
Massive stellar content of stellar complexes and associations in M 33 is studied combining deep UBV photometry from the Local Group Survey (Massey et al. 2006) and JHK photometry from the 2MASS. Two b...
SPIDER - V. Measuring Systematic Effects in Early-Type Galaxy Stellar Masses from Photometric SED Fitting
Measuring Systematic Effects Early-Type Galaxy Stellar Masses Photometric
2011/10/17
We present robust statistical estimates of the accuracy of early-type galaxy stellar masses derived from spectral energy distribution (SED) fitting as functions of various empirical and theoretical as...
Galaxy evolution in groups and clusters: star formation rates, red sequence fractions, and the persistent bimodality
methods: statistical-galaxies: groups: general-galaxies: clusters:general-galaxies: haloes-galaxies: evolution-galaxies: star formation
2011/10/17
Using galaxy group/cluster catalogs created from the Sloan Digital Sky Survey Data Release 7, we examine in detail the specific star formation rate (SSFR) distribution of satellite galaxies and its de...
Discovery and Follow-up of a Nearby Galaxy from the Arecibo Zone of Avoidance Survey
Discovery Follow-up Nearby Galaxy Arecibo Zone Avoidance Survey
2011/10/13
The Arecibo L-Band Feed Array Zone of Avoidance (ALFA ZOA) Survey has discovered a nearby galaxy, ALFA ZOA J1952+1428, at a heliocentric velocity of +279 km s-1. The galaxy was discovered at low Galac...
We develop a general theory for estimating the probability that a galaxy cluster of a given shape exists. The theory is based on the observed result that the distribution of galaxies is very close to ...
Can a Satellite Galaxy Merger Explain the Active Past of the Galactic Center?
Satellite Galaxy Merger Explain Active Past Galactic Center
2011/10/9
Observations of the Galactic Center (GC) have accumulated a multitude of "forensic" evidence indicating that several million years ago the center of the Milky Way galaxy was teaming with starforming a...
The host galaxies and black-hole:galaxy mass ratios of luminous quasars at z~4
galaxies: active – galaxies: fundamental parameters – galaxies: high-redshift –galaxies: photometry – infrared: galaxies – quasars: general
2011/10/8
We present and analyse the deepest, high-quality Ks-band images ever obtained of luminous quasars at z~4, in an attempt to determine the basic properties of their host galaxies less than 1 Gyr after t...
A Model of Habitability Within the Milky Way Galaxy
astrobiology, Galactic evolution, Galactic Habitable Zone, habitability, su- pernovae
2011/9/29
We present a model of the Galactic Habitable Zone (GHZ), described in terms of the spatial and temporal dimensions of the Galaxy that may favour the development of complex life. The Milky Way galaxy i...
Orbit-Based Dynamical Models of the Sombrero Galaxy (NGC 4594)
Dynamical Models Sombrero Galaxy (NGC 4594)
2011/9/29
We present axisymmetric, orbit-based models to study the central black hole, stellar mass-to-light ratio, and dark matter halo of NGC 4594 (M104, the Sombrero Galaxy). For stellar kinematics, we use p...
Star formation in the extended gaseous disk of the isolated galaxy CIG 96
extended gaseous disk isolated galaxy CIG 96
2011/9/27
We study the Kennicutt-Schmidt star formation law and efficiency in the gaseous disk of the isolated galaxy CIG 96 (NGC 864), with special emphasis on its unusually large atomic gas (HI) disk (r_HI/r_...