scholarly journals The [C ii]/[N ii] ratio in 3 < z < 6 sub-millimetre galaxies from the South Pole Telescope survey

2020 ◽  
Vol 494 (3) ◽  
pp. 4090-4097 ◽  
Author(s):  
D J M Cunningham ◽  
S C Chapman ◽  
M Aravena ◽  
C De Breuck ◽  
M Béthermin ◽  
...  
Keyword(s):  
Interstellar Medium ◽  
High Redshift ◽  
South Pole ◽  
Carbon And Nitrogen ◽  
Luminous Infrared Galaxies ◽  
Neutral Gas ◽  
South Pole Telescope ◽  
Fractional Abundance ◽  
Structure Line ◽  
First Time

ABSTRACT We present Atacama Compact Array and Atacama Pathfinder Experiment observations of the [N ii] 205 μm fine-structure line in 40 sub-millimetre galaxies lying at redshifts z = 3–6, drawn from the 2500 deg2 South Pole Telescope survey. This represents the largest uniformly selected sample of high-redshift [N ii] 205 μm measurements to date. 29 sources also have [C ii] 158 μm line observations allowing a characterization of the distribution of the [C ii] to [N ii] luminosity ratio for the first time at high redshift. The sample exhibits a median L$_{{\rm{[C\,{\small II}]}}}$/L$_{{\rm{[N\,{\small II}]}}}$ ≈ 11.0 and interquartile range of 5.0 –24.7. These ratios are similar to those observed in local (Ultra)luminous infrared galaxies (LIRGs), possibly indicating similarities in their interstellar medium. At the extremes, we find individual sub-millimetre galaxies with L$_{{\rm{[C\,{\small II}]}}}$/L$_{{\rm{[N\,{\small II}]}}}$ low enough to suggest a smaller contribution from neutral gas than ionized gas to the [C ii] flux and high enough to suggest strongly photon or X-ray region dominated flux. These results highlight a large range in this line luminosity ratio for sub-millimetre galaxies, which may be caused by variations in gas density, the relative abundances of carbon and nitrogen, ionization parameter, metallicity, and a variation in the fractional abundance of ionized and neutral interstellar medium.

scholarly journals HIGH-REDSHIFT COOL-CORE GALAXY CLUSTERS DETECTED VIA THE SUNYAEV-ZEL'DOVICH EFFECT IN THE SOUTH POLE TELESCOPE SURVEY

2012 ◽  
Vol 761 (2) ◽  
pp. 183 ◽  
Author(s):  
D. R. Semler ◽  
R. Šuhada ◽  
K. A. Aird ◽  
M. L. N. Ashby ◽  
M. Bautz ◽  
...  
Keyword(s):  
Galaxy Clusters ◽  
High Redshift ◽  
South Pole ◽  
The South ◽  
South Pole Telescope ◽  
Sunyaev Zel'dovich Effect

scholarly journals Probing the Interstellar Medium and Stellar Environments of Long-Duration GRBs

2007 ◽  
Vol 3 (S250) ◽  
pp. 457-462
Author(s):  
Miroslava Dessauges-Zavadsky ◽  
Jason X. Prochaska ◽  
Hsiao-Wen Chen
Keyword(s):  
Interstellar Medium ◽  
Gamma Ray ◽  
High Redshift ◽  
Local Environment ◽  
Host Galaxy ◽  
Time Variability ◽  
Neutral Gas ◽  
Derived Properties ◽  
H Ii Region ◽  
Damped Lyman Alpha Systems

AbstractWe review the properties of the gas surrounding high-redshift gamma-ray bursts (GRBs) assessed through the analysis of damped Lyman-alpha systems (DLAs) identified in their afterglow spectra. These GRB-DLAs are characterized by large H I column densities with a median of N(H I) = 1021.7 cm−2, no molecular gas signatures, metallicities ranging from 1/100 to nearly solar with a median exceeding 1/10 solar, and no anomalous abundance patterns. The detection of the atomic Mg lines and the time-variability of the fine-structure lines demonstrates that the majority of the neutral gas along the GRB sightlines is located between 50 pc and a few kpc from the GRB. This implies that this gas is presumably associated with the ambient interstellar medium of the host galaxy and that the derived properties from low-ionization lines do not directly constrain the local environment of the GRB progenitor. The highly ionized gas, traced by N V lines, which could result from a pre-existing H II region produced by the GRB progenitor and neighboring OB stars, appears on the other hand to be very local to the GRB at about 10 pc, yielding a snapshot of the medium's physical conditions at this radius.

scholarly journals Detectors for the South Pole Telescope

2012 ◽  
Vol 37 ◽  
pp. 1381-1388 ◽  
Author(s):  
C.L. Chang ◽  
P. Ade ◽  
K. Aird ◽  
J. Austermann ◽  
J. Beall ◽  
...  
Keyword(s):  
South Pole ◽  
The South ◽  
South Pole Telescope

Access to 2-Arylquinazolines via Catabolism/Reconstruction of Amino Acids with Insertion of Dimethyl Sulfoxide

2021 ◽  
Author(s):  
Jin-Tian Ma ◽  
Li-Sheng Wang ◽  
Zhi Chai ◽  
Xin-Feng Chen ◽  
Bo-Cheng Tang ◽  
...  
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Dimethyl Sulfoxide ◽  
Nitrogen Source ◽  
Carbon And Nitrogen ◽  
First Time

Quinazoline skeletons are synthesized by amino acids catabolism/reconstruction combined with dimethyl sulfoxide insertion/cyclization for the first time. The amino acid acts as a carbon and nitrogen source through HI-mediated catabolism...

scholarly journals The VLT-UVES survey for molecular hydrogen in high-redshift damped Lyman α systems: physical conditions in the neutral gas

2005 ◽  
Vol 362 (2) ◽  
pp. 549-568 ◽  
Author(s):  
Raghunathan Srianand ◽  
Patrick Petitjean ◽  
Cédric Ledoux ◽  
Gary Ferland ◽  
Gargi Shaw
Keyword(s):  
Molecular Hydrogen ◽  
High Redshift ◽  
Physical Conditions ◽  
Neutral Gas

scholarly journals The SINFONI survey of powerful radio galaxies at z ~ 2: Jet-driven AGN feedback during the Quasar Era

2017 ◽  
Vol 599 ◽  
pp. A123 ◽  
Author(s):  
N. P. H. Nesvadba ◽  
C. De Breuck ◽  
M. D. Lehnert ◽  
P. N. Best ◽  
C. Collet
Keyword(s):  
Kinetic Energy ◽  
Interstellar Medium ◽  
Large Scale ◽  
High Redshift ◽  
Radio Galaxies ◽  
Energy Output ◽  
Host Galaxy ◽  
Powerful Radio ◽  
Massive Galaxies ◽  
Gas Kinematics

We present VLT/SINFONI imaging spectroscopy of the rest-frame optical emission lines of warm ionized gas in 33 powerful radio galaxies at redshifts z ≳ 2, which are excellent sites to study the interplay of rapidly accreting active galactic nuclei and the interstellar medium of the host galaxy in the very late formation stages of massive galaxies. Our targets span two orders of magnitude in radio size (2−400 kpc) and kinetic jet energy (a few 1046– almost 1048 erg s-1). All sources have complex gas kinematics with broad line widths up to ~1300 km s-1. About half have bipolar velocity fields with offsets up to 1500 km s-1 and are consistent with global back-to-back outflows. The others have complex velocity distributions, often with multiple abrupt velocity jumps far from the nucleus of the galaxy, and are not associated with a major merger in any obvious way. We present several empirical constraints that show why gas kinematics and radio jets seem to be physically related in all galaxies of the sample. The kinetic energy in the gas from large scale bulk and local outflow or turbulent motion corresponds to a few 10-3 to 10-2 of the kinetic energy output of the radio jet. In galaxies with radio jet power ≳ 1047 erg s-1, the kinetic energy in global back-to-back outflows dominates the total energy budget of the gas, suggesting that bulk motion of outflowing gas encompasses the global interstellar medium. This might be facilitated by the strong gas turbulence, as suggested by recent analytical work. We compare our findings with recent hydrodynamic simulations, and discuss the potential consequences for the subsequent evolution of massive galaxies at high redshift. Compared with recent models of metal enrichment in high-z AGN hosts, we find that the gas-phase metallicities in our galaxies are lower than in most low-z AGN, but nonetheless solar or even super-solar, suggesting that the ISM we see in these galaxies is very similar to the gas from which massive low-redshift galaxies formed most of their stars. This further highlights that we are seeing these galaxies near the end of their active formation phase.

scholarly journals Kinematics of a high-redshift galaxy: A case study

2000 ◽  
pp. 5-8
Author(s):  
M.M. Cirkovic
Keyword(s):  
Interstellar Medium ◽  
Absorption Spectroscopy ◽  
High Redshift ◽  
Redshift Galaxy

A kinematics of a z = 2.81 galaxy toward bright QSO 0528-250, as inferred from the absorption spectroscopy is discussed. There are sufficient arguments for a far-reaching conclusion that we are observing an older, uninvolved version of the local Galactic interstellar medium.

scholarly journals The MOSDEF Survey: Sulfur Emission-line Ratios Provide New Insights into Evolving Interstellar Medium Conditions at High Redshift

2019 ◽  
Vol 881 (2) ◽  
pp. L35 ◽  
Author(s):  
Alice E. Shapley ◽  
Ryan L. Sanders ◽  
Peng Shao ◽  
Naveen A. Reddy ◽  
Mariska Kriek ◽  
...  
Keyword(s):  
Interstellar Medium ◽  
Emission Line ◽  
High Redshift ◽  
Sulfur Emission

scholarly journals GALAXY CLUSTERS DISCOVERED VIA THE SUNYAEV-ZEL’DOVICH EFFECT IN THE FIRST 720 SQUARE DEGREES OF THE SOUTH POLE TELESCOPE SURVEY

2013 ◽  
Vol 763 (2) ◽  
pp. 127 ◽  
Author(s):  
C. L. Reichardt ◽  
B. Stalder ◽  
L. E. Bleem ◽  
T. E. Montroy ◽  
K. A. Aird ◽  
...  
Keyword(s):  
Galaxy Clusters ◽  
South Pole ◽  
The South ◽  
South Pole Telescope ◽  
Sunyaev Zel'dovich Effect
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