State University of Santa Cruz

About: State University of Santa Cruz is a education organization based out in Ilhéus, Brazil. It is known for research contribution in the topics: Population & Species richness. The organization has 3266 authors who have published 4642 publications receiving 51876 citations. The organization is also known as: Universidade Estadual de Santa Cruz.

Superadiabatic-type magnetic amplification in conventional cosmology

Abstract: We consider the evolution of cosmological magnetic fields in Friedmann-Robertson-Walker models and outline a geometrical mechanism for their superadiabatic amplification on large scales. The mechanism operates within standard electromagnetic theory and applies to Friedmann-Robertson-Walker universes with open spatial sections. We discuss the general relativistic nature of the effect and show how it modifies the adiabatic magnetic evolution. Assuming a universe that is only marginally open today, we estimate the main features of the superadiabatically amplified residual field.

Estuarine and marine brachyuran crabs (Crustácea: Decapoda) from Bahía, Brazil: checklist and zoogeographical considerations

Abstract: La costa del Estado de Bahia, situado en el este de Brasil, comprende mas del 12% de la costa brasilena Sin embargo, la fauna de crustaceos de esta area aun se encuentra pobremente conocida, sobretodo aquella de aguas someras Se presenta una lista de 162 especies de crustaceos braquiuros conocidos de esta costa, en base a registros publicados y al material depositado en la Coleccion Carcinologica de la Universidade Estadual de Santa Cruz, Ilheus, Bahia La lista incluye especies estuarinas y marinas (desde playas costeras hasta la plataforma continental y talud) que han sido reportadas por lo menos una vez para el area de estudio En cuanto a los patrones de distribucion longitudinal, cinco especies son circumtropicales, nueve anfi-Atlanticas, dos anfi-Americanas, y el portunido Charybdis hellerii (A Milne-Edwards, 1867) es una especie introducida, nativa del Indo-Pacifico oriental Las restantes 145 especies son nativas del Atlantico occidental, 17 de las cuales son endemicas de Brasil Un total de 46 especies (284%) tienen su limite sur de distribucion en el Atlantico occidental, entre Bahia y el Estado de Rio de Janeiro, lo que sugiere, para el grupo estudiado, la existencia de una amplia zona de transicion entre las provincias zoogeograficas Brasilena y Paulista Finalmente, se reporta dos ampliaciones de ambito en el Atlantico occidental: el himenosomatido Elamena gordonae Monod, 1956 desde Bahia de Camamu (13°54'14"S) a Nova Vicosa (17°53'009"S), y el sesarmido Sesarma curacaoense De Man, 1892 desde Ilheus (15°04'586"S) a Mucuri (18°05'38'S)

A deep view of a fossil relic in the Galactic bulge: the Globular Cluster HP 1

Abstract: HP$\,$1 is an $\alpha$-enhanced and moderately metal-poor bulge globular cluster with a blue horizontal branch. These combined characteristics make it a probable relic of the early star formation in the innermost Galactic regions. Here we present a detailed analysis of a deep near-infrared (NIR) photometry of HP$\,$1 obtained with the NIR GSAOI+GeMS camera at the Gemini-South telescope. $J$ and $K_{\rm S}$ images were collected with an exquisite spatial resolution (FWHM $\sim 0.1$ arcsec), reaching stars at two magnitudes below the MSTO. We combine our GSAOI data with archival F606W-filter $HST$ ACS/WFC images to compute relative proper motions and select bona fide cluster members. Results from statistical isochrone fits in the NIR and optical-NIR colour-magnitude diagrams indicate an age of $12.8^{+0.9}_{-0.8}$ Gyr, confirming that HP$\,$1 is one of the oldest clusters in the Milky Way. The same fits also provide apparent distance moduli in the $K_{\rm S}$ and $V$ filters in very good agreement with the ones from 11 RR Lyrae stars. By subtracting the extinction in each filter, we recover a heliocentric distance of $6.59^{+0.17}_{-0.15}$ kpc. Furthermore, we refine the orbit of HP$\,$1 using this accurate distance and update and accurate radial velocities (from high resolution spectroscopy) and absolute proper motions (from Gaia DR2), reaching mean perigalactic and apogalactic distances of $\sim$0.12 and $\sim$3 kpc respectively.