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We show that the star-forming regions in high-redshift luminous and ultraluminous infrared galaxies (LIRGs and ULIRGs) and submillimeter galaxies (SMGs) have similar physical scales to those in local normal star-forming galaxies. To first…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 Wiphu Rujopakarn , George H. Rieke , Daniel J. Eisenstein , Stephanie Juneau

We present the results of L-band spectroscopical observations of local bright ULIRGs, performed with ISAAC at the VLT. We discuss the L-band spectral features of seven single sources, and the statistical properties of a complete sample of…

The high-density star formation typical of the merger/starburst events that power the large IR luminosities of Ultra Luminous Infrared Galaxies (ULIRGs) (L_{IR}>10^{12}Lsol) throughout the Universe results to extraordinarily high cosmic ray…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 Padelis P. Papadopoulos

A {\it Hubble Space Telescope} ({\it HST}) / Advanced Camera for Surveys (ACS) study of the structural properties of 85 luminous and ultraluminous ($L_{\rm IR} > 10^{11.4}$ L$_\odot$) infrared galaxies (LIRGs and ULIRGs) in the Great…

We analyze high-resolution (400pc) 220GHz continuum and CO(2-1) ALMA observations of a representative sample of 23 local (z<0.165) ULIRG systems (34 individual nuclei) as part of the "Physics of ULIRGs with MUSE and ALMA" (PUMA) project.…

Merging and interactions can radically transform galaxies. However, identifying these events based solely on structure is challenging as the status of observed mergers is not easily accessible. Fortunately, cosmological simulations are now…

We present a 2D study of star formation at kpc and sub-kpc scales of a sample of local (z<0.1) U/LIRGs, based on near-IR VLT-SINFONI observations. We obtained integrated measurements of the star formation rate (SFR) and star formation rate…

We present an analysis of the morphological classification of 89 luminous infrared galaxies (LIRGs) from the Great Observatories All-sky LIRG Survey (GOALS) sample using non-parametric coefficients and compare their morphology as a function…

Astrophysics of Galaxies · Physics 2016-06-15 A. Psychogyios , V. Charmandaris , T. Diaz- Santos , L. Armus , S. Haan , J. Howell , E. Le Floc'h , S. M. Petty , A. S. Evans

It has been often considered that the dissipative collapse caused by a merger of two gas-rich galaxies is responsible for the intense nuclear starbursts or the nonthermal quasar activity in ultraluminous infrared galaxies due to the…

Astrophysics · Physics 2009-10-30 Yoshiaki Taniguchi , Yasuhiro Shioya

We present Herschel far-IR photometry and spectroscopy as well as ground based CO observations of an intermediate redshift (0.21 < z < 0.88) sample of Herschel-selected (ultra)-luminous infrared galaxies (L_IR > 10^11.5L_sun). With these…

Mergers between red galaxies are observed to be common in the nearby Universe, and are thought to be the dominant mechanism by which massive galaxies grow their mass at late times. These ``dry'' mergers can be readily identified in very…

Astrophysics · Physics 2009-11-13 K. E. Whitaker , P. G. van Dokkum

We search for signatures of recent galaxy close interactions and mergers in a sample of 202 early-type galaxies in the local universe from the public SDSS Stripe82 deep images ($\mu_r \sim 28.5$ mag arcsec$^{-2}$). Using two different…

Astrophysics of Galaxies · Physics 2023-02-22 Gourab Giri , Sudhanshu Barway , Somak Raychaudhury

We re-examine the 7,070 candidate ultra-diffuse galaxies (UDGs) in the SMUDGes survey and provide classifications based on their visual morphology. Among the more interesting cases, we identify objects along a low surface brightness galaxy…

Astrophysics of Galaxies · Physics 2025-07-14 Dennis Zaritsky , Richard Donnerstein , Donghyeon J. Khim

We report on the results of systematic infrared 2.5-5 micron spectroscopy of 45 nearby ultraluminous infrared galaxies (ULIRGs) at z < 0.3 using IRC onboard the AKARI satellite. This paper investigates whether the luminosities of these…

We present for the first time metallicity maps generated using data from the Wide Field Spectrograph (WiFeS) on the ANU 2.3m of 9 Luminous Infrared Galaxies (LIRGs) and discuss the abundance gradients and distribution of metals in these…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 J. A. Rich , P. Torrey , L. J. Kewley , M. A. Dopita , D. S. N. Rupke

We present first insights into the far-IR properties for a sample of IRAC and MIPS-24um detected Lyman Break Galaxies (LBGs) at z ~ 3, as derived from observations in the northern field of the Great Observatories Origins Survey (GOODS-N)…

The Spitzer Space Telescope has identified a population of ultra-luminous infrared galaxies (ULIRGs) at z ~ 2 that may play an important role in the evolution of massive galaxies. We measure the stellar masses of two populations of…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 R. S. Bussmann , Arjun Dey , L. Armus , M. J. I. Brown , V. Desai , A. H. Gonzalez , B. T. Jannuzi , J. Melbourne , B. T. Soifer

We report on the results of observations in the CO(1-0) transition of a complete sample of Southern, intermediate redshift (z = 0.2 - 0.5) Ultra-Luminous Infra-Red Galaxies using the Mopra 22m telescope. The eleven ULIRGs with L_FIR >…

Cosmology and Nongalactic Astrophysics · Physics 2012-02-09 Robert Braun , Attila Popping , Kate Brooks , Francoise Combes

We analyse subarcsecond resolution interferometric CO line data for twelve sub-millimetre-luminous (S850um > 5mJy) galaxies with redshifts between 1 and 3, presenting new data for four of them. Morphologically and kinematically most of the…

Cosmology and Nongalactic Astrophysics · Physics 2010-11-03 H. Engel , L. J. Tacconi , R. I. Davies , R. Neri , I. Smail , S. C. Chapman , R. Genzel , P. Cox , T. R. Greve , R. J. Ivison , A. Blain , F. Bertoldi , A. Omont

We present the results of our ALMA HCN J=3-2 and HCO+ J=3-2 line observations of a uniformly selected sample (>25) of nearby ultraluminous infrared galaxies (ULIRGs) at z < 0.15. The emission of these dense molecular gas tracers and…

Astrophysics of Galaxies · Physics 2019-04-03 Masatoshi Imanishi , Kouichiro Nakanishi , Takuma Izumi