Early-type galaxies in the SDSS. II. Correlations between observables

A magnitude limited sample of nearly 9000 early-type galaxies, in the redshift range 0.01 < z < 0.3, was selected from the Sloan Digital Sky Survey using morphological and spectral criteria. The sample was used to study how early-type galaxy observables, including luminosity L, effective radius R_o, surface brightness I_o, color, and velocity dispersion sigma, are correlated with one another. Measurement biases are understood with mock catalogs which reproduce all of the observed scaling relations and their dependences on fitting technique. At any given redshift, the intrinsic distribution of luminosities, sizes and velocity dispersions in our sample are all approximately Gaussian. A maximum likelihood analysis shows that sigma ~ L^{0.25\pm 0.012}, R_o ~ L^{0.63\pm 0.025}, and R_o ~ I^{-0.75\pm 0.02} in the r* band. In addition, the mass-to-light ratio within the effective radius scales as M_o/L ~ L^{0.14\pm 0.02} or M_o/L ~ M_o^{0.22\pm 0.05}, and galaxies with larger effective masses have smaller effective densities: Delta_o ~ M_o^{-0.52\pm 0.03}. These relations are approximately the same in the g*, i* and z* bands. Relative to the population at the median redshift in the sample, galaxies at lower and higher redshifts have evolved only little, with more evolution in the bluer bands. The luminosity function is consistent with weak passive luminosity evolution and a formation time of about 9 Gyrs ago.Comment: 29 pages, 11 figures. Accepted by AJ (scheduled for April 2003). This paper is part II of a revised version of astro-ph/011034

Balita pada Rumahatangga Miskin di Kabupaten Prioritas Kerawanan Pangan di Indonesia Lebih Rentan Mengalami Gangguan Gizi

Latar belakang. Risiko ketidaktahanan pangan rumahtangga timbul karena rendahnya pendapatan, rendahnya ketersediaan pangan maupun faktor gegrafis. Proporsi penduduk dengan asupan kalori di bawah tingkat konsumsi minimum (<1400 kkal/hari) sebesar 14,47% dan (<2000 kkal/hr) sebesar 64,21%, hampir dua kali lipat dari target MDGs (35,32%) menunjukkan adanya gangguan ketahanan pangan rumah tangga di Indonesia, yang dapat berdampak pada gangguan status gizi kelompok rentan, diantaranya Balita. Tujuan. Menilai status gizi dan menganalisis risiko gangguan gizi Balita pada rumahtangga miskin di daerah prioritas dan non prioritas kerawanan pangan di Indonesia Metode. Analisis lanjut data Riskesdas tahun 2010 untuk 99 kabupaten: diantaranya 71 kabupaten prioritas masalah kerawanan pangan (prioritas I:11, prioritas II: 25 dan prioritas III: 35) dan 28 kabupaten non prioritas di Indonesia, dengan unit analisis rumahtangga yaitu 11084 rumahtangga dan 2464 rumahtangga diantaranya tergolong miskin dan memiliki Balita Hasil. Hasil penelitian menunjukkan risiko terjadinya masalah gizi Balita di wilayah prioritas rawan pangan yaitu gizi buruk dan kurang 2,172 kali lebih besar dan risiko sangat pendek dan pendek 1,669 kali besar dibandingkan di wilayah non prioritas. Balita pada rumahtangga miskin di kabupaten prioritas rawan pangan berisiko terjadi gizi buruk dan kurang 1,445 kali lebih besar serta berisiko sangat pendek/pendek lebih besar 1,406 kali dibandingkan Balita pada rumahtangga tidak miskin. Berdasarkan kelompok usia, Balita berusia 1-3 tahun pada rumahtangga miskin didaerah prioritas kerawanan pangan berisiko terjadi gizi buruk dan kurang 1,535 lebih besar serta berisiko terjadi sangat pendek dan pendek 1,608 kali dibandingkan Balita usia 0-6 bulan. Simpulan. Balita pada rumahtangga miskin di daerah kabupaten prioritas kerawanan pangan (I,II dan III) lebih rentan mengalami gangguan gizi (sangat pendek/pendek dan gizi buruk/kurang) dibandingkan di kabupaten non prioritas. Saran. Balita berusia 1-3 tahun pada rumahtangga miskin di kabupaten prioritas rawan pangan di Indonesia perlu mendapat prioritas utama percepatan perbaikan gizi

Optimising Spectroscopic and Photometric Galaxy Surveys: Efficient Target Selection and Survey Strategy

The next generation of spectroscopic surveys will have a wealth of photometric data available for use in target selection. Selecting the best targets is likely to be one of the most important hurdles in making these spectroscopic campaigns as successful as possible. Our ability to measure dark energy depends strongly on the types of targets that we are able to select with a given photometric data set. We show in this paper that we will be able to successfully select the targets needed for the next generation of spectroscopic surveys. We also investigate the details of this selection, including optimisation of instrument design and survey strategy in order to measure dark energy. We use color-color selection as well as neural networks to select the best possible emission line galaxies and luminous red galaxies for a cosmological survey. Using the Fisher matrix formalism we forecast the efficiency of each target selection scenario. We show how the dark energy figures of merit change in each target selection regime as a function of target type, survey time, survey density and other survey parameters. We outline the optimal target selection scenarios and survey strategy choices which will be available to the next generation of spectroscopic surveys.Comment: 16 pages, 22 figures, accepted to MNRAS in dec 201

The Dust Content of Galaxy Clusters

We report on the detection of reddening toward z ~ 0.2 galaxy clusters. This is measured by correlating the Sloan Digital Sky Survey cluster and quasar catalogs and by comparing the photometric and spectroscopic properties of quasars behind the clusters to those in the field. We find mean E(B-V) values of a few times 10^-3 mag for sight lines passing ~Mpc from the clusters' center. The reddening curve is typical of dust but cannot be used to distinguish between different dust types. The radial dependence of the extinction is shallow near the cluster center suggesting that most of the detected dust lies at the outskirts of the clusters. Gravitational magnification of background z ~ 1.7 sources seen on Mpc (projected) scales around the clusters is found to be of order a few per cent, in qualitative agreement with theoretical predictions. Contamination by different spectral properties of the lensed quasar population is unlikely but cannot be excluded.Comment: 4 pages, 3 figure

The Sloan Digital Sky Survey Stripe 82 Imaging Data: Depth-Optimized Co-adds Over 300 Deg^2 in Five Filters

We present and release co-added images of the Sloan Digital Sky Survey (SDSS) Stripe 82. Stripe 82 covers an area of 300 deg^2 on the Celestial Equator, and has been repeatedly scanned 70-90 times in the ugriz bands by the SDSS imaging survey. By making use of all available data in the SDSS archive, our co-added images are optimized for depth. Input single-epoch frames were properly processed and weighted based on seeing, sky transparency, and background noise before co-addition. The resultant products are co-added science images and their associated weight images that record relative weights at individual pixels. The depths of the co-adds, measured as the 5 sigma detection limits of the aperture (3.2 arcsec diameter) magnitudes for point sources, are roughly 23.9, 25.1, 24.6, 24.1, and 22.8 AB magnitudes in the five bands, respectively. They are 1.9-2.2 mag deeper than the best SDSS single-epoch data. The co-added images have good image quality, with an average point-spread function FWHM of ~1 arcsec in the r, i, and z bands. We also release object catalogs that were made with SExtractor. These co-added products have many potential uses for studies of galaxies, quasars, and Galactic structure. We further present and release near-IR J-band images that cover ~90 deg^2 of Stripe 82. These images were obtained using the NEWFIRM camera on the NOAO 4-m Mayall telescope, and have a depth of about 20.0--20.5 Vega magnitudes (also 5 sigma detection limits for point sources).Comment: 19 pages, 17 figures, accepted for publication in ApJ

Daya Terima Dan Indeks Glikemik Makanan Brownies Yang Diperkaya Tepung Beras Merah Dan Kurma

People with diabetes mellitus need low glycemic index snack to support their nutritional requirement and to control blood glucose levels. The research objective was to analyze the acceptability (color, flavor, texture, and taste) and the glycemic index of brownies enriched with red rice flour (Oryza nivara) and dates (Phoenix dactylivera). Completely randomized factorial design with 5 repetitions was used on 5 formulas, one control formula (F0) and 4 modification formulas; F1 (25% red rice flour and 24% dates), F2 (75% red rice flour and 24% dates), F3 (25% red rice flour and 40% dates), and F4 (75% red rice flour and 40% dates). Four professional panelist and 30 non skilled panelists were recruited. Friedman test and Wilcoxon Sign Rank Test at α=0.05 was used to test the difference between group. Formula F2 has the highest acceptability (color, flavor, texture, and taste) with an average value of 2.83, while the lowest acceptability was found in F3 (25% brown rice flour and 40% of dates) with an average value of 2.40. The glycemic index of brownies formula F2 is 41.97. Brownies F2 which substitute wheat flour with red rice flour (25%:75%) and enriched with dates (24%) was the best modification brownies formula for its color, flavor, and texture with glycemic index of 41.97. Adding other ingredients to brownies can be done to improve the taste and lower glycemic index at the best formula (F2)

Phosphodiesterase 5 Inhibition Improves β-Cell Function in Metabolic Syndrome

OBJECTIVE: This study tested the hypothesis that phosphodiesterase 5 inhibition alone or in combination with ACE inhibition improves glucose homeostasis and fibrinolysis in individuals with metabolic syndrome. RESEARCH DESIGN AND METHODS: Insulin sensitivity, beta-cell function, and fibrinolytic parameters were measured in 18 adults with metabolic syndrome on 4 separate days after a randomized, crossover, double-blind, 3-week treatment with placebo, ramipril (10 mg/day), tadalafil (10 mg o.d.), and ramipril plus tadalafil. RESULTS: Ramipril decreased systolic and diastolic blood pressure, ACE activity, and angiotensin II and increased plasma renin activity. Ramipril did not affect insulin sensitivity or beta-cell function. In contrast, tadalafil improved beta-cell function (P = 0.01). This effect was observed in women (331.9 +/- 209.3 vs. 154.4 +/- 48.0 32 micro x mmol(-1) x l(-1), respectively, for tadalafil treatment vs. placebo; P = 0.01) but not in men. There was no effect of any treatment on fibrinolysis. CONCLUSIONS Phosphodiesterase 5 inhibition may represent a novel strategy for improving beta-cell function in metabolic syndrome

The Mean and Scatter of the Velocity Dispersion-Optical Richness Relation for maxBCG Galaxy Clusters

The distribution of galaxies in position and velocity around the centers of galaxy clusters encodes important information about cluster mass and structure. Using the maxBCG galaxy cluster catalog identified from imaging data obtained in the Sloan Digital Sky Survey, we study the BCG-galaxy velocity correlation function. By modeling its non-Gaussianity, we measure the mean and scatter in velocity dispersion at fixed richness. The mean velocity dispersion increases from 202+/-10 km/s for small groups to more than 854+/-102 km/s for large clusters. We show the scatter to be at most 40.5+/-3.5%, declining to 14.9+/-9.4% in the richest bins. We test our methods in the C4 cluster catalog, a spectroscopic cluster catalog produced from the Sloan Digital Sky Survey DR2 spectroscopic sample, and in mock galaxy catalogs constructed from N-body simulations. Our methods are robust, measuring the scatter to well within one-sigma of the true value, and the mean to within 10%, in the mock catalogs. By convolving the scatter in velocity dispersion at fixed richness with the observed richness space density function, we measure the velocity dispersion function of the maxBCG galaxy clusters. Although velocity dispersion and richness do not form a true mass-observable relation, the relationship between velocity dispersion and mass is theoretically well characterized and has low scatter. Thus our results provide a key link between theory and observations up to the velocity bias between dark matter and galaxies.Comment: 25 pages, 15 figures, 2 tables, published in Ap