Metabolic Syndrome X – High Risk Factor for Acute Myocardial Infarction and Its Complications

Metabolic Syndrome X is a clinical entity which comprises the following factors: diabetes mellitus, arterial hypertension, high levels of triglyceride and/or low levels of HDL cholesterol, central obesity and microalbuminuria (by WHO criteria). The first goal of this study was to determine the frequency of the Metabolic Syndrome X (MSX) in patients with acute myocardial infarction compared with the general population. The second goal of the study was to examine the frequency of heart failure and reinfarction rate in the patients with myocardial infarction, with and without MSX. Furthermore, the relationship between gender and MSX was analyzed. A total of 101 patients with acute myocardial infarction took part in randomized trial (32 women and 69 men). MSX and all of its components were diagnosed according to WHO criteria. To determine statistical significance of our results, we used 2 test and t-test for independent samples. From 101 patient 48 had MSX (47.52%), while in the general population incidence of MSX is 3–4%. The reinfarction and the heart failure rate were significantly higher in the group of patients with MSX (p = 0.0067 and p = 0.0217, respectively ). To conclude, the results of the present study confirm that MSX is a high risk factor for myocardial infarction and its complications

Ultraviolet imaging observations of three jellyfish galaxies: Star formation suppression in the centre and ongoing star formation in stripped tails

Spiral galaxies undergo strong ram-pressure effects when they fall into the galaxy cluster potential. As a consequence, their gas is stripped to form extended tails within which star formation can happen, giving them the typical jellyfish appearance. The ultraviolet imaging observations of jellyfish galaxies provide an opportunity to understand ongoing star formation in the stripped tails. We report the ultraviolet observations of the jellyfish galaxies JW39, JO60, JO194 and compare with observations in optical continuum and $\mathrm{H}{\alpha}$. We detect knots of star formation in the disk and tails of the galaxies and find that their UV and H$\alpha$ flux are well correlated. The optical emission line ratio maps of these galaxies are used to identify for every region the emission mechanism, due to either star formation, LINER or a mix of the two phenomena. The star-forming regions in the emission line maps match very well with the regions having significant UV flux. The central regions of two galaxies (JW39, JO194) show a reduction in UV flux which coincides with composite or LINER regions in the emission line maps. The galaxies studied here demonstrate significant star formation in the stripped tails, suppressed star formation in the central regions and present a possible case of accelerated quenching happening in jellyfish galaxies.Comment: Accepted for publication in MNRA

Metabolic Syndrome X – High Risk Factor for Acute Myocardial Infarction and Its Complications

Metabolic Syndrome X is a clinical entity which comprises the following factors: diabetes mellitus, arterial hypertension, high levels of triglyceride and/or low levels of HDL cholesterol, central obesity and microalbuminuria (by WHO criteria). The first goal of this study was to determine the frequency of the Metabolic Syndrome X (MSX) in patients with acute myocardial infarction compared with the general population. The second goal of the study was to examine the frequency of heart failure and reinfarction rate in the patients with myocardial infarction, with and without MSX. Furthermore, the relationship between gender and MSX was analyzed. A total of 101 patients with acute myocardial infarction took part in randomized trial (32 women and 69 men). MSX and all of its components were diagnosed according to WHO criteria. To determine statistical significance of our results, we used 2 test and t-test for independent samples. From 101 patient 48 had MSX (47.52%), while in the general population incidence of MSX is 3–4%. The reinfarction and the heart failure rate were significantly higher in the group of patients with MSX (p = 0.0067 and p = 0.0217, respectively ). To conclude, the results of the present study confirm that MSX is a high risk factor for myocardial infarction and its complications

Walk on the low side: LOFAR explores the low-frequency radio emission of GASP jellyfish galaxies

Galaxie

On the encounter between the GASP galaxy JO36 and the radio plume of GIN 049

Galaxie

Calibrating Star Formation Rate Prescriptions at Different Scales (10 pc-1 kpc) in M31

We calibrate commonly used star formation rate (SFR) prescriptions using observations in five kiloparsec-sized fields in the nearby galaxy Andromeda (M31) at 10 pc spatial resolution. Our observations at different scales enable us to resolve the star-forming regions and to distinguish them from non-star-forming components. We use extinction- corrected Hα from optical integral field spectroscopy as our reference tracer and have verified its reliability via tests. It is used to calibrate monochromatic and hybrid (Hα+a×IR and far-UV+b×IR) SFR prescriptions, which use far-UV (GALEX), 22 μm (Wide-field Infrared Survey Explorer), and 24 μm (MIPS). Additionally, we evaluate other multiwavelength infrared tracers. Our results indicate that the SFR prescriptions do not change (in M31) with spatial scales or with subtraction of the diffuse component. For the calibration factors in the hybrid SFR prescriptions, we find a ≈ 0.2 and b ≈ 22 in M31, which are a factor of 5 higher than in the literature. As the fields in M31 exhibit high attenuation and low dust temperatures, lie at large galactocentric distances, and suffer from high galactic inclination compared to measurements in other galaxies, we propose that the fields probe a dust layer extended along the line of sight that is not directly spatially associated with star-forming regions. This (vertically) extended dust component increases the attenuation and alters the SFR prescriptions in M31 compared to literature measurements. We recommend that SFR prescriptions should be applied with caution at large galactocentric distances and in highly inclined galaxies, due to variations in the relative (vertical) distribution of dust and gas

(Sub)millimetre interferometric imaging of a sample of COSMOS/AzTEC submillimetre galaxies

We investigate the environment of 23 submillimetre galaxies (SMGs) drawn from a signal-to-noise (S/N)-limited sample of SMGs originally discovered in the James Clerk Maxwell Telescope (JCMT)/AzTEC 1.1 mm continuum survey of a Cosmic Evolution Survey (COSMOS) subfield and then followed up with the Submillimetre Array and Plateau de Bure Interferometer at 890 μm and 1.3 mm, respectively. These SMGs already have well-defined multiwavelength counterparts and redshifts. We also analyse the environments of four COSMOS SMGs spectroscopically confirmed to lie at redshifts zspec > 4:5, and one at zspec = 2:49 resulting in a total SMG sample size of 28. We search for overdensities using the COSMOS photometric redshifts based on over 30 UV-NIR photometric measurements including the new UltraVISTA data release 2 and Spitzer/SPLASH data, and reaching an accuracy of σ Δz/(1+z) = 0.0067 (0:0155) at z < 3:5 (>3.5). To identify overdensities we apply the Voronoi tessellation analysis, and estimate the redshift-space overdensity estimator δ g as a function of distance from the SMG and/or overdensity centre. We test and validate our approach via simulations, X-ray detected groups or clusters, and spectroscopic verifications using VUDS and zCOSMOS catalogues which show that even with photometric redshifts in the COSMOS field we can efficiently retrieve overdensities out to z ∼ 5. Our results yield that 11 out of 23 (48%) JCMT/AzTEC 1.1 mm SMGs occupy overdense environments. Considering the entire JCMT/AzTEC 1.1 mm S=N ≥ 4 sample and taking the expected fraction of spurious detections into account, this means that 35-61% of the SMGs in the S/N-limited sample occupy overdense environments. We perform an X-ray stacking analysis in the 0.5-2 keV band using a 32″ aperture and our SMG positions, and find statistically significant detections. For our z < 2 subsample we find an average flux of (4.0 ± 0.8) × 10 -16 erg s -1 cm -2 and a corresponding total mass of M200 = 2:8 × 10 13 M Ȯ . The z > 2 subsample yields an average flux of (1:3 ± 0:5) × 10 -16 erg s -1 cm -2 and a corresponding total mass of M 200 = 2 × 10 13 M Ȯ . Our results suggest a higher occurrence of SMGs occupying overdense environments at z ≥ 3 than at z < 3. This may be understood if highly star-forming galaxies can only be formed in the highest peaks of the density field tracing the most massive dark matter haloes at early cosmic epochs, while at later times cosmic structure may have matured sufficiently that more modest overdensities correspond to sufficiently massive haloes to form SMGs

GASP XXXVIII: the LOFAR-MeerKAT-VLA view on the nonthermal side of a jellyfish galaxy

Galaxie