scholarly journals Redshift Surveys With 2DF

1998 ◽  
Vol 11 (1) ◽  
pp. 473-481
Author(s):  
Matthew Colless ◽  
Brian Boyle
Keyword(s):  
20Th Century ◽  
21St Century ◽  
Preliminary Results ◽  
Redshift Surveys ◽  
Order Of Magnitude ◽  
Redshift Survey ◽  
The Subject ◽  
Galaxy Redshift ◽  
Survey Strategy

This IAU Joint Discussion proposes to address the subject of redshift surveys in the 21st century. This paper, however, deals with two major new redshift surveys that those involved sincerely hope will be completed in the 20th century. Nonetheless, these surveys are relevant to the topic of the meeting, as they clearly foreshadow the scope and style of redshift surveys, if not in the coming millennium, at least in the coming decade. The surveys are being carried out with the new Two Degree Field (2dF) facility on the Anglo-Australian Telescope (AAT), a 400-fibre multi-object spectrograph with the capability, as described in Section 2, to increase the size of redshift surveys by an order of magnitude over current best efforts. The main scientific goals, survey strategy and some preliminary results from the 2dF Galaxy Redshift Survey are outlined in Section 3, while Section 4 similarly describes the 2dF QSO Redshift Survey. Further information can be found on the WWW at http://www.aao.gov.au/2df/ for the 2dF facility, at http://msowww.anu.edu.au/~colless/2dF/ for thegalaxy survey and at http://www.aao.gov.au/local/www/rs/qso_surv.html for the QSO survey.

Roderick Peattie’s Mountain Geography – A Critique and Field Study (1936)

2017 ◽  
Vol 41 (2) ◽  
pp. 238-242
Author(s):  
David R Butler
Keyword(s):  
Field Study ◽  
20Th Century ◽  
21St Century ◽  
Western Europe ◽  
English Language ◽  
Extended Period ◽  
Late 20Th Century ◽  
The Subject ◽  
Mountain Landscapes ◽  
Mountain Geography

Roderick Peattie’s book, Mountain Geography – A Critique and Field Study (1936), is a classic work that established a format for English-language books on the subject of mountain geography that largely persists to the present day. Peattie’s work was based primarily on an extended period of study in the mountains of western Europe. His book reflects a strong Eurocentric view of mountain landscapes that carries over into late-20th century and 21st century English-language books on mountain landscapes.

Star Formation Rates of a z~1 DEEP2 Galaxy Sample from LIRIS Multi-slit Hα Spectroscopy

2006 ◽  
Vol 2 (S235) ◽  
pp. 417-418
Author(s):  
Nayra Rodríguez-Eugenio ◽  
Kai G. Noeske ◽  
Jose Acosta-Pulido ◽  
Francisco Prada ◽  
Arturo Manchado ◽  
...  
Keyword(s):  
Star Formation ◽  
Rest Frame ◽  
Near Infrared ◽  
Nir Spectroscopy ◽  
Star Forming ◽  
Preliminary Results ◽  
Galaxy Sample ◽  
Redshift Survey ◽  
Galaxy Redshift ◽  
Stellar Masses

AbstractWe present preliminary results of Hα near-infrared (NIR) spectroscopy of 16 galaxies with redshifts in the range 0.8 ≤ z ≤ 1.0 drawn from the DEEP2 Galaxy Redshift Survey. The spectra were taken using the multi-slit mode of LIRIS (Long-slit Intermediate Resolution Infrared Spectrograph), installed at the 4.2-m WHT. Twelve out of 16 spectra yield robust (>5σ) Hα detections. We compare star formation rates (SFRs) from Hα luminosities to those derived from DEEP2 rest-frame UV measurements. This study is part of a larger program to obtain accurate Hα luminosities of about 50 star-forming galaxies at z ~ 1 in the Extended Groth Strip. Our scientific goals are the measurement of SFRs from Hα, and the comparison and calibration of Hα and other SFR tracers at z ~ 1. The study will be complemented with galaxy stellar masses, reddening estimates, galaxy morphologies and metallicities.

scholarly journals The Sydney University Molonglo Sky Survey (SUMSS) and Optical Redshift Surveys of the Southern Sky

2002 ◽  
Vol 199 ◽  
pp. 11-20
Author(s):  
Elaine M. Sadler ◽  
R.W. Hunstead
Keyword(s):  
Southern Hemisphere ◽  
Noise Level ◽  
Radio Data ◽  
Redshift Surveys ◽  
Radio Imaging ◽  
Sky Survey ◽  
Redshift Survey ◽  
Galaxy Redshift ◽  
New Generation

The Sydney University Molonglo Sky Survey (SUMSS) is a radio imaging survey at 843 MHz of the whole sky south of declination −30°. With a resolution of 43″ × 43″ cosec |δ| and an rms noise level of ∼ 1 mJy/beam, SUMSS has similar sensitivity and resolution to the northern NRAO VLA Sky Survey (NVSS). Here, we present some results from the first two years of SUMSS and also show what can be done by combining radio data from SUMSS and NVSS with the new generation of large optical redshift surveys (including the 2dF Galaxy Redshift Survey and 6dF Galaxy Survey) now becoming available in the southern hemisphere.

scholarly journals A Redshift Survey in the South Galactic Pole Region

1994 ◽  
Vol 161 ◽  
pp. 687-691
Author(s):  
G. Vettolani ◽  
E. Zucca ◽  
A. Cappi ◽  
R. Merighi ◽  
M. Mignoli ◽  
...  
Keyword(s):  
The South ◽  
Preliminary Results ◽  
Redshift Survey ◽  
Galaxy Redshift

We present preliminary results of a galaxy redshift survey we are accomplishing as an ESO Key Project over about 40 square degrees in a region near the South Galactic Pole, to a limiting magnitude bJ = 19.4. Up to now ∼ 50% of the survey has been completed, providing about 2000 galaxy redshifts.

Cosmological Parameters from the 2dF Galaxy Redshift Survey

2005 ◽  
Vol 201 ◽  
pp. 158-167
Author(s):  
Matthew Colless
Keyword(s):  
Precise Measurement ◽  
Cosmological Parameters ◽  
Current Status ◽  
Low Density ◽  
Distortion Parameter ◽  
Preliminary Results ◽  
Redshift Survey ◽  
Space Distortion ◽  
Galaxy Redshift

This paper describes the goals, current status and some preliminary results from the 2dF Galaxy Redshift Survey. In particular we present the most precise measurement to date of the redshift-space distortion parameter, β ≡ Ω0.6/b = 0.39 ± 0.05. Combined with recent CMB anisotropy measurements, our results strongly favour a low-density universe.

scholarly journals Uncompleted project of the Central Municipal Park in Lublin

2020 ◽  
Vol 15 (2) ◽  
pp. 7-17
Author(s):  
Kamila Lucyna Boguszewska
Keyword(s):  
20Th Century ◽  
Urban Space ◽  
21St Century ◽  
Comparative Studies ◽  
Spatial Development ◽  
Development Plans ◽  
The Subject ◽  
Architectural Competitions ◽  
First Time ◽  
The City

The areas of the former Royal Pond (Staw Królewski) in Lublin were the subject of many projects and architectural competitions. Over the years the concepts of development of this area have been changing, but both in the pre-war period and later, it was supposed to be green urban space accessible to the residents. The aim of the article is to outline the development plans of the city of Lublin (second half of the 20th century / beginning of the 21st century) concerning the implementation of the Central Municipal Park, which was planned in the area of the former pond. The works on this project, which was finally never implemented, have been carried out since the end of the 1950s. This name, used interchangeably with Culture Park (Park Kultury), appeared for the first time in the General Spatial Development Plan for the city of Lublin in 1957. The author, on the basis of conducted research, archival queries and comparative studies, analyses the ideas and solutions concerning the development of this part of the Bystrzyca river valley.

scholarly journals Remake jako forma dialogu z klasyką (inspiracje „Szynelem” Mikołaja Gogola w wybranej literaturze rosyjskiej XX i XXI w.)

Politeja ◽  
2019 ◽  
Vol 16 (2(59)) ◽  
pp. 327-351
Author(s):  
Martyna Kowalska
Keyword(s):  
20Th Century ◽  
Short Story ◽  
21St Century ◽  
Russian Literature ◽  
Growing Up ◽  
Wide Range ◽  
Russian Literary ◽  
The Subject ◽  
In The Beginning ◽  
Political Principles

Remake as a Form of the Dialogue with the Classics (Nikolai Gogol’s ‘The Overcoat' as an Inspiration in Russian Literature in the End of the 20th Century and the Beginning of the 21st Century) The article is devoted to the very recent phenomenon in contemporary Russian literature – to a remake. The subject of this research is the literary ‘dialogue’ between classical short story (The Overcoat by Nikolay Gogol) and Russian literary works in the end of the 20th century and the beginning of the 21st century. In scope, there is a micro-novel of Vladimir Voinovich The Fur Hat, then Dmitry Gorchev’s novel The Phone and Vladimir Shinkariev’s work The Flat, as well as Bashmachkin – a drama written by Oleg Bogaev. The interest that contemporary authors demonstrate in Gogol’s work is a result of the problems described which still appear to be current. This is also an attempt to make Russian classics contemporary and reinterpret the 20th century novel simultaneously. The methods of bringing ‘Gogol’s text’ up to date in the above-mentioned works present the wide range of possibilities that remake gives. Voinovich put social and political principles of Soviet state in the first place. The Table of Ranks together with its submission of an individual towards the state has been deeply analyzed. In Gorchev’s and Shinkariev’s stories contemporary Bashmachkins – ‘little men’, eager to fulfill their dreams about better life – are presented. What is more, those texts show a very interesting picture of Russian reality in the beginning of 21st century ruled by lawlessness, corruption and money. The most original approach to Gogol’s work was presented by Bogaev in Bashmachkin’s story continuation. However, the main character is the overcoat who is administering justice on behalf of a dying hero. The remake-sequel is not only a modernized version of Gogol’s plot but also a new text growing up from a postmodern game. A proposed analysis of the above-mentioned Russian remakes presents many different ways a classic literature text can be modernized thanks to this kind of adaptation. However, on the ground of Russian literature, a remake is above all a pursuit of a dialogue with the classics, an attempt to modernize the problematic aspects and emphasize timeless contents.

scholarly journals An ANN Approach to Classification of Galaxy Spectra for the 2DF Galaxy Redshift Survey

1999 ◽  
Vol 183 ◽  
pp. 154-154
Author(s):  
S.R. Folkes ◽  
O. Lahav ◽  
S.J. Maddox
Keyword(s):  
Principal Component ◽  
Automated Classification ◽  
Signal To Noise ◽  
Normal Galaxies ◽  
Redshift Surveys ◽  
Redshift Survey ◽  
Galaxy Redshift ◽  
Spectral Simulations ◽  
Artificial Neural Network Ann

We present a method for automated classification of galaxies with low signal-to-noise (S/N) spectra typical of redshift surveys. We develop spectral simulations based on the parameters for the 2dF Galaxy Redshift Survey and investigate the technique of Principal Component Analysis when applied to spectra of low S/N. It is found that the projection onto the first 8 Principal Components hold most of the real spectral information, with later projections only adding noise. Using these components as input, we train an Artificial Neural Network (ANN) to classify the noisy simulated spectra into morphological classes. We find that more than 90% of our sample of normal galaxies are correctly classified into one of five morphological classes for simulations at bJ=19.7.

Theorizing the Subject

2020 ◽  
Author(s):  
Sidonie Smith
Keyword(s):  
Personal Identity ◽  
20Th Century ◽  
21St Century ◽  
Human Person ◽  
Object Relation ◽  
Ethical Principles ◽  
False Consciousness ◽  
Subject Formation ◽  
The Subject

Ever since the Greek philosophers and fabulists pondered the question “What is man?,” inquiries into the concept of the subject have troubled humanists, eventuating in fierce debates and weighty tomes. In the wake of the Descartes’s cogito and Enlightenment thought, proposals for an ontology of the idealist subject’s rationality, autonomy, and individualism generated tenacious questions regarding the condition of pre-consciousness, the operation of feelings and intuitions, the subject-object relation, and the origin of moral and ethical principles. Throughout the 19th and 20th centuries, Marx, and theorists he and Engels influenced, pursued the materialist bases of the subject, through analyses of economic determinism, self-alienation, and false consciousness. Through another lineage, Freud and theorists of psychic structures pursued explanations of the incoherence of a split subject, its multipartite psychodynamics, and its relationship to signifying systems. By the latter 20th century, theorizations of becoming a gendered woman by Beauvoir, of disciplining power and ideological interpellation by Foucault and Althusser, and of structuralist dynamics of the symbolic realm expounded by Lacan, energized a succession of poststructuralist, postmodern, feminist, queer, and new materialist theorists to advance one critique after another of the inherited concept of the liberal subject as individualist, disembodied (Western) Man. In doing so, they elaborated conditions through which subjects are gendered and racialized and offered explanatory frameworks for understanding subjectivity as an effect of positionality within larger formations of patriarchy, slavery, conquest, colonialism, and global neoliberalism. By the early decades of the 21st century, posthumanist theorists dislodged the subject as the center of agentic action and distributed its processual unfolding across trans-species companionship, trans-corporeality, algorithmic networks, and conjunctions of forcefields. Persistently, theorists of the subject referred to an entangled set of related but distinct terms, such as the human, person, self, ego, interiority, and personal identity. And across diverse humanities disciplines, they struggled to define and refine constitutive features of subject formation, most prominently relationality, agency, identity, and embodiment.

scholarly journals Improved correction of VIPERS angular selection effects in clustering measurements

2014 ◽  
Vol 11 (S308) ◽  
pp. 167-168
Author(s):  
A. Pezzotta ◽  
B.R. Granett ◽  
J. Bel ◽  
L. Guzzo ◽  
S. de la Torre ◽  
...  
Keyword(s):  
Growth Rate ◽  
Correlation Function ◽  
Cosmological Parameters ◽  
Selection Effects ◽  
Redshift Surveys ◽  
Point Correlation ◽  
Point Correlation Function ◽  
Redshift Survey ◽  
Galaxy Redshift ◽  
Better Than

AbstractClustering estimates in galaxy redshift surveys need to account and correct for the way targets are selected from the general population, as to avoid biasing the measured values of cosmological parameters. The VIMOS Public Extragalactic Redshift Survey (VIPERS) is no exception to this, involving slit collisions and masking effects. Pushed by the increasing precision of the measurements, e.g. of the growth rate f, we have been re-assessing these effects in detail. We present here an improved correction for the two-point correlation function, capable to recover the amplitude of the monopole of the two-point correlation function ξ(r) above 1 h-1 Mpc to better than 2.

Sign in / Sign up

Export Citation Format

Share Document