Reseñas

Contiene: INQUISITIONES. INQUIRIÇÕES GERAIS DE D. DINIS: 1284. José Augusto de Sotto Mayor Pizarro (ed.) Lisboa, Academia das Ciências de Lisboa, 2007. (Portugaliae Monumenta Historica: a saeculo octavo post Christum usque ad quintum decimum, Nova Série, vol. 3). ISBN 978-972-623-101-1. 133 páginas / Inés Calderón Medina ; EL BAILE GENERAL DE ARAGÓN DURANTE EL REINADO DE PEDRO IV EL CEREMONIOSO (1336-1387). Luís Blanco Domingo. La fiscalidad regia. Institución “Fernando el Católico” (C.S.I.C.). Zaragoza. 2009. 253. I.S.B.N.: 978-84-9911-018-9 / Héctor García López ; LA ENCOMIENDA DE MARTOS DE LA ORDEN DE CALATRAVA (SIGLOS XIII-XV). Francisco Luis Ruiz Fúnez (Ed. Ayuntamiento de Martos. Martos, 2010. 164 págs. + fotos y planos) ISBN: 978-84-923864-2-0 / José Carlos Gutiérrez Pérez ; LA FRONTERA SEFARDÍ. LA RECONQUISTA Y LA COMUNIDAD JUDÍA EN LA ESPAÑA MEDIEVAL. Jonathan Ray. Alianza Editorial, Madrid, 2009, 302 p. I.S.B.N.: 978-84-206-8395-9 / Jorge Maíz Chacón ; BATTAGLIE E PROTAGONISTI DELLA SARDEGNA MEDIOEVALE. Alessandra Cioppi. AMD Edizioni, Cagliari, 2008. ISBN: 978-88-95462-15-8. 434 Págs. / Esther Martí ; LIBRO DE LA BAILÍA DE CANTAVIEJA (1428-1470). Germán Navarro Espinach y Concepción Villanueva Morte. Departamento de Historia Medieval, Ciencias y Técnicas Historiográficas y Estudios Árabes e Islámicos de la Universidad de Zaragoza, Instituto de Estudios Turolenses y Grupo de investigación CEMA, Zaragoza, 2009, 374 páginas. / Francisco Vicente Navarro ; LA NOBLEZA SEÑORIAL EN LA CORONA DE CASTILLA. Mª Concepción Quintanilla Raso. Universidad de Granada, Granada, 2008. ISSN: 978-84-338-4854-3. 357 págs. / Santiago Ponsoda López de Atalaya ; TESTAMENTI ECLESIAE PORTUGALIAE (1071-1325), COLECÇÃO HISTÓRIA RELIGIOSA: FONTES E SUBSIDIOS 6. Maria do Rosario Barbosa Morujão (coord.) Centro de estudios de Historia Religiosa da Universidade Católica Portuguesa, Lisboa, 2010. ISBN: 978-972-8361-31-0. 767 Páginas, 39 imágenes / Néstor Vigil Montes.

VdBH 222: a starburst cluster in the inner Milky Way

Context. It has been suggested that the compact open cluster VdBH 222 is a young massive distant object. Aims. We set out to characterise VdBH 222 using a comprehensive set of multi-wavelength observations. Methods. We obtained multi-band optical (UBVR) and near-infrared (JHKS) photometry of the cluster field, as well as multi-object and long-slit optical spectroscopy for a large sample of stars in the field. We applied classical photometric analysis, as well as more sophisticated methods using the CHORIZOS code, to determine the reddening to the cluster. We then plotted dereddened HR diagrams and determined cluster parameters via isochrone fitting. Results. We have identified a large population of luminous supergiants confirmed as cluster members via radial velocity measurements. We find nine red supergiants (plus one other candidate) and two yellow supergiants. We also identify a large population of OB stars. Ten of them are bright enough to be blue supergiants. The cluster lies behind ≈7.5 mag of extinction for the preferred value of RV = 2.9. Isochrone fitting allows for a narrow range of ages between 12 and 16 Ma. The cluster radial velocity is compatible with distances of ~6 and ~10 kpc. The shorter distance is inconsistent with the age range and Galactic structure. The longer distance implies an age ≈ 12 Ma and a location not far from the position where some Galactic models place the far end of the Galactic bar. Conclusions. VdBH 222 is a young massive cluster with a likely mass >20 000 M⊙. Its population of massive evolved stars is comparable to that of large associations, such as Per OB1. Its location in the inner Galaxy, presumably close to the end of the Galactic bar, adds to the increasing evidence for vigorous star formation in the inner regions of the Milky Way.

Orbital and Physical Properties of the σ Ori Aa, Ab, B Triple System

We provide a complete characterization of the astrophysical properties of the σ Ori Aa, Ab, B hierarchical triple system and an improved set of orbital parameters for the highly eccentric σ Ori Aa, Ab spectroscopic binary. We compiled a spectroscopic data set comprising 90 high-resolution spectra covering a total time span of 1963 days. We applied the Lehman-Filhés method for a detailed orbital analysis of the radial velocity curves and performed a combined quantitative spectroscopic analysis of the σ Ori Aa, Ab, B system by means of the stellar atmosphere code FASTWIND. We used our own plus other available information on photometry and distance to the system for measuring the radii, luminosities, and spectroscopic masses of the three components. We also inferred evolutionary masses and stellar ages using the Bayesian code BONNSAI. The orbital analysis of the new radial velocity curves led to a very accurate orbital solution of the σ Ori Aa, Ab pair. We provided indirect arguments indicating that σ Ori B is a fast-rotating early B dwarf. The FASTWIND+BONNSAI analysis showed that the Aa, Ab pair contains the hottest and most massive components of the triple system while σ Ori B is a bit cooler and less massive. The derived stellar ages of the inner pair are intriguingly younger than the one widely accepted for the σ Orionis cluster, at 3 ± 1 Ma. The outcome of this study will be of key importance for a precise determination of the distance to the σ Orionis cluster, the interpretation of the strong X-ray emission detected for σ Ori Aa, Ab, B, and the investigation of the formation and evolution of multiple massive stellar systems and substellar objects.

The little-studied cluster Berkeley 90 I. LS III +46 11: a very massive O3.5 If* + O3.5 If* binary

Context. It appears that most (if not all) massive stars are born in multiple systems. At the same time, the most massive binaries are hard to find owing to their low numbers throughout the Galaxy and the implied large distances and extinctions. Aims. We want to study LS III +46 11, identified in this paper as a very massive binary; another nearby massive system, LS III +46 12; and the surrounding stellar cluster, Berkeley 90. Methods. Most of the data used in this paper are multi-epoch high S/N optical spectra, although we also use Lucky Imaging and archival photometry. The spectra are reduced with dedicated pipelines and processed with our own software, such as a spectroscopic-orbit code, CHORIZOS, and MGB. Results. LS III +46 11 is identified as a new very early O-type spectroscopic binary [O3.5 If* + O3.5 If*] and LS III +46 12 as another early O-type system [O4.5 V((f))]. We measure a 97.2-day period for LS III +46 11 and derive minimum masses of 38.80 ± 0.83 M⊙ and 35.60 ± 0.77 M⊙ for its two stars. We measure the extinction to both stars, estimate the distance, search for optical companions, and study the surrounding cluster. In doing so, a variable extinction is found as well as discrepant results for the distance. We discuss possible explanations and suggest that LS III +46 12 may be a hidden binary system where the companion is currently undetected.

Características de ecossistema e sustentabilidade: estudo sobre a vegetação original e remanescente da bacia hidrográfica do Rio Canoas

Com o objetivo de comparar em termos de paisagem, a vegetação florestal nativa com os fragmentos da vegetação remanescente na bacia hidrográfica do Rio Canoas, situada na divisa dos Estados de São Paulo (à Nordeste) e Minas Gerais (à Centro-Oeste), busca-se dar subsídios aos atores locais para trabalhar políticas públicas com vistas à sustentabilidade do uso dos recursos naturais na região. Foram mapeados sete tipos de vegetação, com destaque para o cerrado e a floresta estacional semidecidual. O método do estudo é exploratório, realizado em fontes secundárias, pesquisa bibliográfica e documental, baseado no estudo de mapas e suas simulações, dados do IBGE, Embrapa, Ministério do Meio Ambiente e trabalhos de autores, como: Cogo (1987), Coutinho (2000) e Bozini (2005). Observou-se que a bacia hidrográfica objeto em estudo é degradada historicamente pelos diversos usos e ocupações do solo e sua maior parte ainda está sujeita à um elevado nível de perturbação, seja pela pecuária, ou mesmo pelas plantações de laranja, milho, eucalipto, cana-de-açúcar e, principalmente, pela cultura do café.