The 2dF Galaxy Redshift Survey: spectra and redshifts

Colless, Matthew; Dalton, Gavin; Maddox, S.; Sutherland, William J.; Norberg, Peder; Cole, Shaun; Bland-Hawthorn, Joss; Bridges, Terry J.; Cannon, R. D.; Collins, Chris; Couch, Warrick J.; Cross, Nicholas; Deeley, Kathryn; Propris, Roberto De; Driver, Simon P.; Efstathiou, G.; Ellis, Richard S.; Frenk, Carlos S.; Glazebrook, Karl; Jackson, C. A.; Lahav, O.; Lewis, Ian; Lumsden, S. L.; Madgwick, Darren; Peacock, J. A.; Peterson, Bruce A.; Price, Ian; Seaborne, Mark D.; Taylor, Keith

doi:10.1046/j.1365-8711.2001.04902.x

Cited by 2,060 publications

(1,530 citation statements)

References 30 publications

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“…The survey covers 37.5 square degrees with B-band magnitudes in the range 13 < B < 24. The survey region coincides with both the 2dF Galaxy Redshift Survey northern strip (2dFGRS, Colless et al 2001) and the Sloan Digital Sky Survey region (Abazajian et al 2003).…”

Section: Datamentioning

confidence: 65%

Metallicity of high stellar mass galaxies with signs of merger events

Alonso

Michel-Dansac

Lambas

2010

A&A

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Aims. We focus on an analysis of galaxies of high stellar mass and low metallicity. Evidence of recent merger events in their optical images allow us to classify galaxies into either disturbed or undisturbed, and to study galaxy properties such as morphology, colours, stellar populations, and global environment for the different metallicity ranges and disturbance classes. Methods. We cross-correlated the Millenium Galaxy Catalogue (MGC) and the Sloan Digital Sky Survey (SDSS) galaxy catalogue to provide a sample of MGC objects with high resolution imaging and both spectroscopic and photometric information available in the SDSS database. For each galaxy in our sample, we conducted a systematic morphological analysis by visual inspection of MGC images using their luminosity contours. The galaxies are classified as either disturbed or undisturbed objects. We divide the sample into three metallicity regions, within wich we compare the properties of disturbed and undisturbed objects. Results. We find that the fraction of galaxies that are strongly disturbed, indicative of being merger remnants, is higher when lower metallicity objects are considered. The three bins analysed consist of approximatively 15%, 20%, and 50% disturbed galaxies (for high, medium, and low metallicity, respectively). Moreover, the ratio of the disturbed to undisturbed relative distributions of the population age indicator, D n (4000), in the low metallicity bin, indicates that the disturbed objects have substantially younger stellar populations than their undisturbed counterparts. In addition, we find that an analysis of colour distributions provides similar results, showing that low metallicity galaxies with a disturbed morphology are bluer than those that are undisturbed. The bluer colours and younger populations of the low metallicity, morphologically disturbed objects suggest that they have experienced a recent merger with an associated enhanced star formation rate.

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Section: Datamentioning

confidence: 65%

Metallicity of high stellar mass galaxies with signs of merger events

Alonso

Michel-Dansac

Lambas

2010

A&A

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“…Coupled with a highly optimised observing strategy (Scodeggio et al 2009), this allows us to double the galaxy sampling rate in the redshift range of interest, with respect to a pure magnitude-limited sample. At the same time, the area and depth of the survey result in a relatively large volume, 5 × 10 7 h −3 Mpc 3 , analogous to that of the Two Degree Field Galaxy Redshift Survey (2dFGRS) at z 0.1 (Colless et al 2001(Colless et al , 2003. Such a combination of sampling rate and depth is unique amongst current redshift surveys at z > 0.5.…”

Section: Datamentioning

confidence: 96%

The VIMOS Public Extragalactic Redshift Survey (VIPERS)

Torre¹,

Guzzo²,

Peacock³

et al. 2013

A&A

288

117

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We present the general real-and redshift-space clustering properties of galaxies as measured in the first data release of the VIPERS survey. VIPERS is a large redshift survey designed to probe in detail the distant Universe and its large-scale structure at 0.5 < z < 1.2. We describe in this analysis the global properties of the sample and discuss the survey completeness and associated corrections. This sample allows us to measure the galaxy clustering with an unprecedented accuracy at these redshifts. From the redshift-space distortions observed in the galaxy clustering pattern we provide a first measurement of the growth rate of structure at z = 0.8: f σ 8 = 0.47 ± 0.08. This is completely consistent with the predictions of standard cosmological models based on Einstein gravity, although this measurement alone does not discriminate between different gravity models.

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“…Galaxies in the survey are found by special algorithms, which investigate the data by searching for signals above a certain noise deviation threshold and then applying diameter criteria or magnitude limits or both to the measured surface brightness profiles or total magnitudes. For automated spectroscopic surveys like the SDSS or the two-degree-Field Galaxy Redshift Survey (2dFGRS, Colless et al 2001), there are routines which automatically find target galaxies within the survey images and then assign fibers to the chosen objects.…”

Section: The Sdss As a Survey For Lsbsmentioning

confidence: 99%

The large-scale environment of low surface brightness galaxies

Rosenbaum

Krusch

Bomans

et al. 2009

A&A

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Context. The exact formation scenarios and evolutionary processes that led to the existence of the class of low surface brightness galaxies (LSBs) have not yet been understood completely. There is evidence that the lack of star formation expected to be typical of LSBs can only occur if the LSBs were formed in low-density regions. Aims. Since the environment of LSBs has been studied before only on small scales (below 2 Mpc), a study of the galaxy content in the vicinity of LSB galaxies on larger scales could add a lot to our understanding of the origin of this galaxy class. Methods. We used the spectroscopic main galaxy sample of the SDSS DR4 to investigate the environmental galaxy density of LSB galaxies compared to the galaxy density in the vicinity of high surface brightness galaxies (HSBs). To avoid the influence of evolutionary effects depending of redshift and to minimize completeness issues within the SDSS, we limited the environment studies to the local universe with a redshift of z ≤ 0.1. At first we studied the luminosity distribution of the LSB sample obtained from the SDSS within two symmetric redshift intervals (0.01 < z ≤ 0.055 and 0.055 < z ≤ 0.1). Results. It was found that the lower redshift interval is dominated by small, low-luminosity LSBs, whereas the LSB sample in the higher redshift range mainly consists of larger, more luminous LSBs. This comes from selection effects of the SDSS spectroscopic sample. The environment studies, also divided into these two redshift bins, show that both the low mass, and the more massive LSBs possess an environment with a lower galaxy density than HSBs. The differences in the galaxy density between LSBs and HSBs are significant on scales between 2 and 5 Mpc, the scales of groups and filaments. To quantify this, we have introduced for the first time the LSB-HSB Antibias. The obtained LSB-HSB Antibias parameter has a value of 10%-15%. Conclusions. From these results we conclude that LSBs formed in low-density regions of the initial universe and have drifted until now to the outer parts of the filaments and walls of the large-scale structure. Furthermore, our results, together with actual cosmological simulations, show that LSBs are caused by a mixture of nature and nurture.

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The 2dF Galaxy Redshift Survey: spectra and redshifts

Cited by 2,060 publications

References 30 publications

Metallicity of high stellar mass galaxies with signs of merger events

Metallicity of high stellar mass galaxies with signs of merger events

The VIMOS Public Extragalactic Redshift Survey (VIPERS)

The large-scale environment of low surface brightness galaxies

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