Synthesis and Characterization of Co-polymers of N-Phenyl Methacrylamide With Glycidyl Methacrylate

Reddy, G. Jayasimha; Reddy, Mohan M.; Reddy, G. Ramachandra; Naidu, S. Venkata; Reddy, A.V.R.

doi:10.1163/156855508x363861

Cited by 3 publications

(8 citation statements)

References 15 publications

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“…Consistent with the result of Reddy et al. (2008), we find that the two distributions are very similar at net Ly EWs 0 Å, but there is a sharp drop off at toward higher values of net Ly EW that is largely responsible for the difference in overall mean net Ly EW between the two samples.…”

Section: Analysis and Resultssupporting

confidence: 91%

“…Reddy et al. (2008) showed that the ratio of strong emitters to absorbers for LBGs at redshifts is approximately the same as for those selected by the same set of colour criteria at (see the respective population statistics in Table 6). Thus, there is no underlying selection bias of aLBGs versus eLBGs that could affect the segregation properties in the different redshift ranges.…”

Section: Analysis and Resultsmentioning

confidence: 92%

“…(2004), Reddy et al. (2008). Similarly, we make use of the rest-frame net Ly EW measurements of Shapley et al.…”

Section: Datamentioning

confidence: 99%

“…These selection criteria result in a net Ly EW distribution for the 25.5 samples that is representative of the intrinsic distribution for the parent population of galaxies (Reddy et al. 2008). The mean redshift of our extracted sample is z = 2.16 , corresponding to a mean absolute magnitude sensitivity 0.58 mag fainter in the observed -band imaging than at z = 2.96, the mean redshift of the 3 LBG sample.…”

Section: Datamentioning

confidence: 99%

“…2009; Reddy et al. 2008; Reddy & Steidel 2009), and they remain a key target population in recent surveys (e.g., Arrabal Haro et al. 2018; Ono et al.…”

Section: Introductionmentioning

confidence: 99%

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Lyman-α at cosmic noon I: Lyα spectral type selection of z ∼ 2 – 3 Lyman break galaxies with broadband imaging

Foran,

Cooke,

Reddy

et al. 2023

Publ. Astron. Soc. Aust.

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High-redshift Lyman break galaxies (LBGs) are efficiently selected in deep images using as few as three broadband filters, and have been shown to have multiple intrinsic and small- to large-scale environmental properties related to Lyman-α. In this paper we demonstrate a statistical relationship between net Lyman-α equivalent width (net Lyα EW) and the optical broadband photometric properties of LBGs at z ∼ 2. We show that LBGs with the strongest net Lyα EWin absorption (aLBGs) and strongest net Lyα EWin emission (eLBGs) separate into overlapping but discrete distributions in (U n – ${\mathcal R}$ ) colour and ${\mathcal R}$ -band magnitude space, and use this segregation behaviour to determine photometric selection criteria by which sub-samples with a desired Lyα spectral type can be selected using data from as few as three broadband optical filters. We propose application of our result to current and future large-area and all-sky photometric surveys that will select hundreds of millions of LBGs across many hundreds to thousands of Mpc, and for which spectroscopic follow-up to obtain Lyα spectral information is prohibitive. To this end, we use spectrophotometry of composite spectra derived from a sample of 798 LBGs divided into quartiles on the basis of net Lyα EWto calculate selection criteria for the isolation of Lyα-absorbing and Lyα-emitting populations of z ∼ 3 LBGs using ugri broadband photometric data from the Vera Rubin Observatory Legacy Survey of Space and Time (LSST).

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Section: Analysis and Resultssupporting

confidence: 91%

Section: Analysis and Resultsmentioning

confidence: 92%

“…(2004), Reddy et al. (2008). Similarly, we make use of the rest-frame net Ly EW measurements of Shapley et al.…”

Section: Datamentioning

confidence: 99%

Section: Datamentioning

confidence: 99%

“…2009; Reddy et al. 2008; Reddy & Steidel 2009), and they remain a key target population in recent surveys (e.g., Arrabal Haro et al. 2018; Ono et al.…”

Section: Introductionmentioning

confidence: 99%

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Lyman-α at cosmic noon I: Lyα spectral type selection of z ∼ 2 – 3 Lyman break galaxies with broadband imaging

Foran,

Cooke,

Reddy

et al. 2023

Publ. Astron. Soc. Aust.

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Chemical analysis of polymers

Nebhani

Jaisingh

2020

Polymer Science and Innovative Applications

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Lyman-α at Cosmic Noon II: The relationship between kinematics and Lyman-α in z ∼ 2–3 Lyman break galaxies

Foran,

Cooke,

Wisnioski

et al. 2023

Publ. Astron. Soc. Aust.

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We report for the first time a relationship between galaxy kinematics and net Lyman-α equivalent width (net Lyα EW) in star forming galaxies during the epoch of peak cosmic star formation. Building on the previously reported broadband imaging segregation of Lyα-emitting and Lyα-absorbing Lyman-break galaxies (LBGs) at z ∼ 2 (Paper I in this series) and previously at z ∼ 3, we use the Lyα spectral type classification method to study the relationship between net Lyα EWand nebular emission-line kinematics in samples of z ∼ 2 and z ∼ 3 LBGs drawn from the literature, for which matching rest-frame UV photometry, consistently measured net Lyα EWs, and kinematic classifications from integral field unit spectroscopy are available. we show that z ∼ 2 and z ∼ 3 LBGs segregate in colour-magnitude space according to their kinematic properties and Lyman-α spectral type, and conclude that LBGs with Lyα dominant in absorption (aLBGs) are almost exclusively rotation-dominated (presumably disc-like) systems, and LBGs with Lyα dominant in emission (eLBGs) characteristically have dispersion-dominated kinematics. We quantify the relationship between the strength of rotational dynamic support (as measured using vobs/2σint and vrot/σ0) and net Lyα EWfor subsets of our kinematic sample where these data are available, and demonstrate the consistency of our result with other properties that scale with net Lyα EWand kinematics. Based on these findings, we suggest a method by which large samples of rotation- and dispersion-dominated galaxies might be selected using broadband imaging in as few as three filters and/or net Lyα EWalone. If confirmed with larger samples, application of this method will enable an understanding of galaxy kinematic behaviour over large scales in datasets from current and future large-area and all-sky photometric surveys that will select hundreds of millions of LBGs in redshift ranges from z ∼ 2 – 6 across many hundreds to thousands of Mpc. Finally, we speculate that the combination of our result linking net Lyα EW and nebular emission-line kinematics with the known large-scale clustering behaviour of Lyα-absorbing and Lyα-emitting LBGs is evocative of an emergent bimodality of early galaxies that is consistent with a nascent morphology-density relation at z ∼ 2 – 3.

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Synthesis and Characterization of Co-polymers of N-Phenyl Methacrylamide With Glycidyl Methacrylate

Cited by 3 publications

References 15 publications

Lyman-α at cosmic noon I: Lyα spectral type selection of z ∼ 2 – 3 Lyman break galaxies with broadband imaging

Lyman-α at cosmic noon I: Lyα spectral type selection of z ∼ 2 – 3 Lyman break galaxies with broadband imaging

Chemical analysis of polymers

Lyman-α at Cosmic Noon II: The relationship between kinematics and Lyman-α in z ∼ 2–3 Lyman break galaxies

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