We present optical integral field spectroscopy for five $z<0.062$ narrow-line
Seyfert 1 galaxies (NLS1s) host galaxies, probing their host galaxies at
$\gtrsim 2-3$ kpc scales. Emission lines in the nuclear AGN spectra and the
large-scale host galaxy are analyzed separately, based on an AGN-host
decomposition technique. The host galaxy gas kinematics indicates large-scale
gas rotation in all five sources. At the probed scales of $\gtrsim 2-3$ kpc,
the host galaxy gas is found to be predominantly ionized by star formation
without any evidence of a strong AGN contribution. None of the five objects
shows specific star formation rates exceeding the main sequence of low-redshift
star forming galaxies. The specific star formation rates for MCG-05-01-013 and
WPVS 007 are roughly consistent with the main sequence, while ESO 399-IG20, MS
22549-3712, and TON S180 show lower specific star formation rates, intermediate
to the main sequence and red quiescent galaxies. The host galaxy metallicities,
derived for the two sources with sufficient data quality (ESO 399-IG20 and
MCG-05-01-013), indicate central oxygen abundances just below the low-redshift
mass-metallicity relation. Based on this initial case study, we outline a
comparison of AGN and host galaxy parameters as a starting point for future
extended NLS1 studies with similar methods.Comment: 25 pages, 8 figures, accepted for publication in ApJ on 3 September
  201

Alessandro Collo

Debora Fedele

Erika Pistone

Federica Barutta

Gabriella Gruden

Graziella Bruno

Virginia Bicchiega

English

arXiv

Scharwächter, J.

Husemann, B.

Busch, G.

Komossa, S.

Dopita, M.

HAL-INSU

Spatially Resolved Spectroscopy of Narrow-line Seyfert 1 Host Galaxies

Barutta, Federica

Gruden, Gabriella

Bruno, Graziella

Institutional Research Information System University of Turin

Short term variation in NTproBNP after lifestyle intervention in severe obesity.

Natriuretic peptides are not only involved in cardiovascular adaption to various conditions, but also in metabolic diseases. We performed this study to assess the effect of a very short time of lifestyle inpatient intervention on NTproBNP values in normotensive subjects with severe obesity and normal cardiac function.We recruited 14 consecutive obese normotensive subjects with normal cardiac function who were aged 30 years and more and were referred to inpatient rehabilitation in an academic clinic over a two months period. They were examined at baseline and after a 3-weeks program including dietary intervention with hypocaloric diet and assisted personalized physical aerobic and anaerobic activities and compared to age, sex and BMI-matched control subjects under usual care.BMI significantly decreased (40.8 ±1.6 vs 42.3 ± 1.6 kg/m2, p <0.0001). Median reduction in body weight was 4.9 kg (interquartile range 2.4-5.2 kg). After diet and exercise-induced weight loss, plasma NTproBNP levels showed an almost two-fold increase, which was statistically significant (28.2 ± 12.3 vs 17.2 ± 13.2 ng/L, p = 0.01), and particularly relevant in the subgroup with NT-proBNP values below median values compared to those with higher values (p = 0.02). No significant variations were found in control subjects (18.0 ± 13.0 vs 16.5 ± 11.2 ng/L, p = 0.18). The lipid profile was significantly ameliorated, and both HbA1c and insulin levels showed a marginally non-significant decrease after treatment.An almost two-fold increase in NTproBNP levels was evident after a very short time period of lifestyle intervention in normotensive severe obese patients without cardiac disease. This finding might have clinical relevance, considering the role of NT-proBNP as risk factor of impaired glucose tolerance

Spatially-resolved spectroscopy of narrow-line Seyfert 1 host galaxies

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