نتایج جستجو برای: sfr
تعداد نتایج: 2025 فیلتر نتایج به سال:
We present estimates of intrinsic scatter in the Star Formation Rate (SFR) Stellar Mass (M∗) correlation in the redshift range 0.5 < z < 3.0 and in the mass range 10 < M∗ < 10 11 M . We utilize photometry in the Hubble Ultradeep Field (HUDF12) and Ultraviolet Ultra Deep Field (UVUDF) campaigns and CANDELS/GOODS-S. We estimate SFR, M∗ from broadband Spectral Energy Distributions (SEDs) and the b...
We present a comparison of the physical properties of a rest-frame 250μm selected sample of massive, dusty galaxies from 0 < z < 5.3. Our sample comprises 29 highredshift submillimetre galaxies (SMGs) from the literature, and 843 dusty galaxies at z < 0.5 from the Herschel -ATLAS, selected to have a similar stellar mass to the SMGs. The z > 1 SMGs have an average SFR of 390 −70M⊙yr −1 which is ...
We compare the results of Grimm et al. (2003) and Ranalli et al. (2003) on the LX– SFR relation in normal galaxies. Based on the LX−stellar mass dependence for LMXBs, we show, that low SFR (< ∼ 1 M⊙/year) galaxies in the Ranalli et al. sample are contaminated by the X-ray emission from low mass X-ray binaries, unrelated to the current star formation activity. The most important conclusion from ...
We have built two samples of galaxies selected at 0.2µm (hereafter UV) and 60 µm (hereafter FIR) covering a sky area of 35.36 deg 2. The UV selected sample contains 25 galaxies brighter than AB0.2 = 17. All of them, but one elliptical, are detected at 60 µm with a flux density larger or equal to 0.2 Jy. The UV counts are significantly lower than the euclidean extrapolation towards brighter flux...
We derive the initial mass function for the Col 69 cluster ( 5 Myr), covering several orders of magnitude in mass (50 – 0.02 M⊙). 1. The Lambda Orionis Star Forming Region One of the most amazing areas in the northern, winter sky is Orion and its myriads of star forming regions (SFR). One of the most prominent, albeit not very well studied, is the SFR dominated by the O8 III star λ Ori, the Lam...
Context. We present an evolutionary disc model for the thin disc in the solar cylinder based on a continuous star formation history (SFR) and a continuous dynamical heating (AVR) of the stellar subpopulations. Aims. We determine the star formation history of the thin disc in the solar vicinity. The self-consistent model of the vertical structure allows predictions of the density, age, metallici...
BACKGROUND AND PURPOSE Several scoring systems have recently emerged to predict stone-free rate (SFR) and complications after percutaneous nephrolithotomy (PCNL). We aimed to compare the most commonly used scoring systems (Guy's stone score, S.T.O.N.E. nephrolithometry, and CROES nomogram), assess their predictive accuracy for SFR and other postoperative variables, and develop a risk group stra...
We present a study of the star formation histories of the Lupus I, III, and IV clouds using the Herschel 70–500 μm maps obtained by the Herschel Gould Belt Survey Key Project. By combining the new Herschel data with the existing Spitzer catalog we obtained an unprecedented census of prestellar sources and young stellar objects in the Lupus clouds, which allowed us to study the overall star form...
We examine the cosmic star formation rate (SFR) and its dependence on galaxy stellar mass over the redshift range 0.8 < z < 2 using data from the Gemini Deep Deep Survey (GDDS). The SFR in the most massive galaxies (M⋆ > 10M⊙) was six times higher at z = 2 than it is today. It drops steeply from z = 2, reaching the present day value at z∼ 1. In contrast, the SFR density of intermediate mass gal...
OBJECTIVE To determine the long-term effects of acupuncture in patients with xerostomia of different etiologies and the influence of additional treatment. DESIGN Retrospective study. SUBJECTS Seventy patients, between the ages of 33 and 82, with xerostomia due to primary and secondary Sjögren's syndrome, irradiation and other causes were included. The median duration of xerostomia was 32 mo...
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