1,999 research outputs found
Hubble Space Telescope Survey of the Perseus Cluster: II. Photometric scaling relations in different environments
We investigate the global photometric scaling relations traced by early-type
galaxies in different environments, ranging from dwarf spheroidals, over dwarf
elliptical galaxies, up to giant ellipticals (-8 mag > M_V > -24 mag). These
results are based in part on our new HST/ACS F555W and F814W imagery of dwarf
spheroidal galaxies in the Perseus Cluster. These scaling relations are almost
independent of environment, with Local Group and cluster galaxies coinciding in
the various diagrams. We show that at M_V ~ -14 mag, the slopes of the
photometric scaling relations involving the Sersic parameters change
significantly. We argue that these changes in slope reflect the different
physical processes that dominate the evolution of early-type galaxies in
different mass regimes. As such, these scaling relations contain a wealth of
information that can be used to test models for the formation of early-type
galaxies.Comment: accepted for publication by MNRA
CADIS has seen the Virgo overdensity and parts of the Monoceros and `Orphan' streams in retrospect
We reanalyze deep star counts in five CADIS fields. The data are presented as
vertical density distributions of stars perpendicular to the Galactic plane. In
three fields the profiles are consistent with each other, while in two fields
significant overdensities of stars are found. The overdensity in one field can
be associated with the Virgo overdensity which can be traced right into the
disk of the Milky Way. Using this detection we estimate the mass of the Virgo
overdensity and show that this is equivalent to the stellar content of a Local
Group dwarf spheroidal galaxy. The overdensity in the second field is more
difficult to associate with a previously known overdensity. We suggest that it
is related both to the Monoceros stream and the recently discovered Orphan
stream.Comment: 4 pages, 3 figures, accepted as Research Note by Astron. Astrophy
The Baryon Content of Cosmic Structures
We make an inventory of the baryonic and gravitating mass in structures
ranging from the smallest galaxies to rich clusters of galaxies. We find that
the fraction of baryons converted to stars reaches a maximum between M500 =
1E12 and 1E13 Msun, suggesting that star formation is most efficient in bright
galaxies in groups. The fraction of baryons detected in all forms deviates
monotonically from the cosmic baryon fraction as a function of mass. On the
largest scales of clusters, most of the expected baryons are detected, while in
the smallest dwarf galaxies, fewer than 1% are detected. Where these missing
baryons reside is unclear.Comment: ApJ Letters, in pres
Faint dwarf spheroidals in the Fornax Cluster: A flat luminosity function
We have discovered about 70 very faint dwarf galaxies in the Fornax Cluster.
These dSphs candidates follow the same magnitude-surface brightness relation as
their counterparts in the Local Group, and even extend it to fainter limits.
The faintest dSph candidate in our sample has an absolute magnitude of M_V =
-8.8 mag and a central surface brightness of mu_V = 27 mag/arcsec^2. There
exists a tight color-magnitude relation for the early-type galaxies in Fornax
that extends from the giant to the dwarf regime. The faint-end slope of the
luminosity function of the early-type dwarfs is flat (alpha = -1.1+/-0.1),
contrary to the results obtained by Kambas et al. (2000).Comment: 4 pages, 3 figures, accepted for publication in Astronomy &
Astrophysics (Letters
Glosa de Miguel de Cifuentes sobre las leyes de Toro : quaderno de las leyes y nuevas decisiones hechas y ordenadas en al ciudad de Toro, sobre las dudas de derecho que continuamente solían y suelen ocurrir en estos reynos ...
Texto en latín y glosas en castellanoCopia digital. Valladolid : Junta de Castilla y León. Consejería de Cultura y Turismo, 2009-2010Texto a línea tirada, glosa a dos col.Port. con grab xil. arquitectónic
Double balloon catheter for induction of labour in women with a previous cesarean section, could it be the best choice?
Introduction: We analysed the efficacy and safety of double-balloon catheter for cervical ripening in women with a previous cesarean section and which were the most important variables associated with an increased risk of repeated cesarean delivery. Materials and methods: We designed an observational retrospective study of 418 women with unfavourable cervices (Bishop Score <5), a prior cesarean delivery, and induction of labour with a double-balloon catheter. Baseline maternal data and perinatal outcomes were recorded for a descriptive, bivariate, and multivariate analysis. A p value <0.05 was considered statistically significant. Results: Most women improved their initial Bishop Score (89.5%) although only a 20.8% of them went into spontaneous active labour. Finally, 51.4% of the women achieved a vaginal delivery. Five cases of intrapartum uterine rupture (1.2%) occurred. After multivariate analysis, main risk factors for repeated cesarean section were dystocia in the previous pregnancy (OR 1.744; CI 95% 1.066–2.846), the absence of previous vaginal delivery (OR 2.590; CI 95% 1.066–6.290), suspected fetal macrosomia (OR 2.410; CI 95% 0.959–6.054), and duration of oxytocin induction period (OR 1.005; CI 95% 1.004–1.006). The area under the curve was 0.789 (p < 0.001). Conclusions: Double-balloon catheter seems to be safe and effective for cervical ripening in women with a previous cesarean delivery and unfavourable cervix. In our study, most women could have a vaginal delivery in spite of their risk factors for cesarean delivery. A multivariate model based on some clinical variables has moderate predictive value for intrapartum cesarean section
Body composition and somatotype in professional men's handball according to playing positions
Se realizó un estudio descriptivo transversal en 19 jugadores profesionales
del Club Balonmano Valladolid. Las mediciones antropométricas fueron
realizadas según el protocolo estándar. Se estimaron la masa grasa y ósea, se
calculó el somatotipo y se analizaron las diferencias entre las variables en
función de la posición.
Como resultados, se obtuvo que los pivotes fueron los jugadores más
pesados (con mayor porcentaje de masa grasa); los extremos, los más ligeros y
los laterales, junto con los pivotes, los más altos. No se observaron diferencias
en el IMC en los grupos. En la somatocarta los centrales y laterales se situaron
en la zona central; los extremos y los pivotes en la endomorfa-mesomorfa y los
porteros en la ecto-endomorfa.
Así se evidenció que las variables antropométricas, los datos de
composición corporal y la somatocarta de los deportistas confirman las
características morfológicas básicas de los jugadores para la posición para la
que son más aptosA cross-sectional descriptive study was accomplished in 19 professional players
from Valladolid Handball Club. Anthropometric measurements were performed
according to standard protocol. Body fat and bone mass were estimated, and
the somatotype was calculated.
As results, the line players were significantly the heaviest players; the wings
were lightest and the backs, with the line players, the tallest. Nevertheless, no
significant differences in BMI were observed. Regarding the body composition,
the line players showed the highest values of fat-mass. No differences in BMI
were observed in the groups. With respect to the somatochart, the center backs
and backs were in the central area; wings and line players showed an
endomorph-mesomorph development, and goalkeepers were in the ectoendomorph
area.
As conclusions, anthropometric variables, body composition data and the
somatochart of the athletes evaluated confirm the basic morphological
characteristics of the players for the position for which they are best suite
Stellar luminosity functions of rich star clusters in the Large Magellanic Cloud
We show the results of deep V and I HST photometry of 6 rich star clusters in
the Large Magellanic Cloud with different ages and metallicities. The number of
stars with measured magnitudes in each cluster varies from about 3000 to 10000.
We build stellar density and surface brightness profiles for the clusters and
extract half-light radii and other structural parameters for each. We also
obtain luminosity functions, Phi (Mv), down to Mv ~ 6 (m/msun > 0.6), and
investigate their dependence with distance from the cluster centre well beyond
their half-light radius. In all clusters we find a systematic increase in the
luminosity function slope with radial distance from the centre. Among the
clusters displaying significant mass segregation are the two youngest in the
sample: NGC 1805 and NGC 1818. For these two clusters we obtain present-day
mass functions. The NGC 1818 mass function is in excellent agreement with that
derived by other authors, also using HST data. They young cluster mass function
slopes differ, that of NCG 1805 being systematically steeper than NGC 1818.
Since these are very young stellar systems (age < 40 Myrs), these variations
may reflect the initial conditions rather than evolution due to internal
dynamics.Comment: 10 pages, 24 figure
Severe lymphopenia after subcutaneous cladribine in a patient with multiple sclerosis: To vaccinate or not?
Objective: To describe a fatal case of influenza A pneumonia in a patient with severe lymphopenia after receiving subcutaneous cladribine to treat her multiple sclerosis (MS). Methods: Case report. Results: A 53-year-old woman developed fatal influenza pneumonia associated with grade 4 lymphopenia two months after receiving a total dose of 60mg subcutaneous cladribine. Despite treatment with oseltamivir, her condition deteriorated and the patient passed away after developing respiratory failure. Conclusion: Cladribine-related lymphopenia is usually mild to moderate, however severe lymphopenia may occur. People with MS, especially those who are immunosuppressed, should be offered the inactivated influenza vaccine annually
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