Sobre el ornitónimo "Zaida" y la presencia de la Grulla Damisela (Anthropoides Virgo) en España

Una de las aves del solar hispano más antiguas y más desconocidas es la grulla damisela (Anthropoides virgo). Extinguida de la península ibérica desde la década de los años veinte del siglo pasado, este ave ha recibido diversos vernáculos, desde el más primitivo y genuino de origen arábigo “çaida” (escrito, a veces, como caida, çayda, zaida, zayda, etc.), hasta otros más recientes como “señorita”, “garza de Mallorca”, “grulla de Numidia”, “grulla mora”, “grulla moruna”, o “rugidera”. Nos proponemos pergeñar una somera evolución de aquel olvidado ornitónimo, tan prístino y elegante, recuperando textos literarios e imágenes de interés. Al mismo tiempo, se intenta constatar la presencia de la grulla damisela como ave nativa española.

I. Lipsi Diua Virgo Hallensis : beneficia eius & miracula fide atque ordine descripta.

Mode of access: Internet.

Maria Augusta Virgo Diepara : in septem libros tributa ... /

Mode of access: Internet.

Eryci Puteani Diva Virgo Aspricollis : beneficia ejus & miracula novissima.

Mode of access: Internet.

Discovery of ultracompact dwarf galaxies in the Virgo Cluster

We have discovered nine ultracompact dwarf galaxies (UCDs) in the Virgo Cluster, extending samples of these objects outside the Fornax Cluster. Using the Two Degree Field (2dF) multifiber spectrograph on the Anglo-Australian Telescope, the new Virgo members were found among 1500 color-selected, starlike targets with 16: 0 < b(j) < 20.2 in a 2 degrees diameter field centered on M87 (NGC 4486). The newly found UCDs are comparable to the UCDs in the Fornax Cluster, with sizes less than or similar to 100 pc, -12.9 < M-B < -10.7, and exhibiting red absorption-line spectra, indicative of an older stellar population. The properties of these objects remain consistent with the tidal threshing model for the origin of UCDs from the surviving nuclei of nucleated dwarf elliptical galaxies disrupted in the cluster core but can also be explained as objects that were formed by mergers of star clusters created in galaxy interactions. The discovery that UCDs exist in Virgo shows that this galaxy type is probably a ubiquitous phenomenon in clusters of galaxies; coupled with their possible origin by tidal threshing, the UCD population is a potential indicator and probe of the formation history of a given cluster. We also describe one additional bright UCD with M-B = -12.0 in the core of the Fornax Cluster. We find no further UCDs in our Fornax Cluster Spectroscopic Survey down to bj 19.5 in two additional 2dF fields extending as far as 3 degrees from the center of the cluster. All six Fornax bright UCDs identified with 2dF lie within 0.degrees 5 (projected distance of 170 kpc) of the central elliptical galaxy NGC 1399.

Analisi di radiosorgenti diffuse presenti in ammassi di galassie attraverso lo studio di emissioni non termiche

In questo lavoro di tesi verrà affrontato uno studio sugli ammassi di galassie che costituiscono le strutture virializzate più grandi dell’Universo. L’analisi delle emissioni provenienti dall’ICM (Intracluster Medium) consente di ottenere informazioni su alcuni dei processi che caratterizzano la dinamica degli ammassi di galassie, come merger e cooling flow, e in particolare di testare le attuali ipotesi sulla formazione ed evoluzione degli ammassi. Le radiazioni provenienti dal gas extragalattico possono essere sia di tipo termico che non termico: le prime causate dal meccanismo di Bremsstrahlung termica e appartenenti alla banda X, le seconde invece dovute prevalentemente dall’emissione di Sincrotrone in banda Radio. Durante lo studio degli ammassi di galassie verranno approfondite le principali radiosorgenti diffuse: Aloni, mini-Aloni e Relitti, focalizzando lo studio su questi ultimi e analizzando un campione di dati ad essi relativi, con lo scopo di trovare un’eventuale correlazione tra alcune delle loro proprietà. La ricerca sugli ammassi di galassie risulta importante in quanto, trattandosi delle più grandi strutture dell’Universo che abbiano raggiunto l’equilibrio viriale, il loro studio risulta un valido strumento per la verifica dell’attuale Modello Cosmologico.

Characterization of the Galactic White Dwarf Population in the Next Generation Virgo Cluster Survey

Halo white dwarfs remain one of the least studied stellar populations in the Milky Way because of their faint luminosities. Recent work has uncovered a population of hot white dwarfs which are thought to be remnants of low-mass Population II stars. This thesis uses optical data from the Next Generation Virgo Cluster Survey (NGVS) and ultravoilet data from the GALEX Ultraviolet Virgo Cluster Survey (GUViCS) to select candidates which may belong to this population of recently formed halo white dwarfs. A colour selection was used to separate white dwarfs from QSOs and main-sequence stars. Photometric distances are calculated using model colour-absolute magnitude relations. Proper motions are calculated by using the difference in positions between objects from the Sloan Digital Sky Survey and the NGVS. The proper motions are combined with the calculated photometric distances to calculate tangential velocities, as well as approximate Galactic space velocities. White dwarf candidates are characterized as belonging to either the disk or the halo using a variety of methods, including calculated scale heights (z> 1 kpc), tangential velocities (vt >200 km/s), and their location in (V,U) space. The 20 halo white dwarf candidates which were selected using Galactic space velocities are analyzed, and their colours and temperatures suggest that these objects represent some of the youngest white dwarfs in the Galactic halo.

Studio multi-banda dal sub-parsec al kilo-parsec dell'emissione del getto nella radio galassia IC 1531

In questo lavoro di tesi si presenta il primo studio multi-scala e multi-frequenza focalizzato sul getto della radiogalassia IC1531 (z=0.026) con i satelliti Chandra, XMM-Newton e Fermi con l’obiettivo di tracciarne l’emissione alle alte energie; definire i processi radiativi responsabili dell’emissione osservata e stimare i principali parametri fisici del getto; stimare l’energetica del getto alle diverse scale. La sorgente è stata selezionata per la presenza di un getto esteso (≈5’’) osservato in radio e ai raggi X, inoltre, era riportata come possibile controparte della sorgente gamma 3FGLJ0009.6-3211 presente nel terzo catalogo Fermi (3FGL). La presenza di emissione ai raggi γ, confermata dal nostro studio, è importante per la modellizzazione della SED della regione nucleare. L’emissione X del nucleo è dominata da una componente ben riprodotta da una legge di potenza con indice spettrale Γ=2.2. L’analisi dell’emissione in banda gamma ha evidenziato una variabilità su scale di 5 giorni, dalla quale è stato possibile stimare le dimensioni delle regione emittente. Inoltre viene presentato lo studio della distribuzione spettrale dell’energia della regione nucleare di IC 1531 dalla banda radio ai raggi γ. I modelli ci permettono di determinare la natura dell’emissione gamma e stimare la potenza cinetica del getto a scale del su-pc. Gli osservabili sono stati utilizzati per ottenere le stime sui parametri del modello. La modellizzazione così ottenuta ha permesso di stimare i parametri fisici del getto e la potenza trasportata del getto a scale del sub-pc. Le stime a 151MHz suggerisco che il getto abbia basse velocita' (Γ≤7) e angolo di inclinazione rispetto alla linea di vista 10°<ϑ<20°; nel complesso, il trasporto di energia da parte del getto risulta efficiente. L’origine dell’emissione X del getto a grandi scale è consistente con un’emissione di sincrotrone, che conferma la classificazione di IC1531 come sorgente di bassa potenza MAGN.

The SHIVir Survey: A Dynamical Catalogue of Virgo Cluster Galaxies and their Scaling Relations

By virtue of its proximity and richness, the Virgo galaxy cluster is a perfect testing ground to expand our understanding of structure formation in the Universe. Here, we present a comprehensive dynamical catalogue based on 190 Virgo cluster galaxies (VCGs) in the "Spectroscopy and H-band Imaging of the Virgo cluster" (SHIVir) survey, including kinematics and dynamical masses. Spectroscopy collected over a multi-year campaign on 4-8m telescopes was joined with optical and near-infrared imaging to create a cosmologically-representative overview of parameter distributions and scaling relations describing galaxy evolution in a rich cluster environment. The use of long-slit spectroscopy has allowed the extraction and systematic analysis of resolved kinematic profiles: Halpha rotation curves for late-type galaxies (LTGs), and velocity dispersion profiles for early-type galaxies (ETGs). The latter are shown to span a wide range of profile shapes which correlate with structural, morphological, and photometric parameters. A study of the distributions of surface brightnesses and circular velocities for ETGs and LTGs considered separately show them all to be strongly bimodal, hinting at the existence of dynamically unstable modes where the baryon and dark matter fractions may be comparable within the inner regions of galaxies. Both our Tully-Fisher relation for LTGs and Fundamental Plane analysis for ETGs exhibit the smallest scatter when a velocity metric probing the galaxy at larger radii (where the baryonic fraction becomes sub-dominant) is used: rotational velocity measured in the outer disc at the 23.5 i-mag arcsec^{-2} level, and velocity dispersion measured within an aperture of 2 effective radii, respectively. Dynamical estimates for gas-poor and gas-rich VCGs are merged into a joint analysis of the stellar-to-total mass relation (STMR), stellar TFR, and Mass-Size relation. These relations are all found to contain strong bimodalities or dichotomies between the ETG and LTG samples, alluding to a "mixed scenario'' evolutionary sequence between morphological/dynamical classes that involves both quenching and dry mergers. The unmistakable differentiation between these two galaxy classes appears robust against different classification schemes, and supports the notion that they are driven by different evolutionary histories. Future observations using integral field spectroscopy and including lower-mass galaxies should solidify this hypothesis.

CCi Submission to ALRC Copyright Inquiry

The attached report was prepared by Professor Terry Flew, Dr. Nicolas Suzor and Dr. Bonnie Liu of the Queensland University of Technology.   It was developed in consultation with Professor Stuart Cunningham, Professor Anne Fitzgerald, Associate Professor Axel Bruns, Associate Professor Jean Burgess (QUT), Professor Julian Thomas (Swinburne University of Technology), Professor Christoph Antons (Deakin University), and film producer Ms. Cathy Henkel (Virgo Productions and Adjunct Professor, QUT).

Rise of the eco warriors

A group of passionate and naïve young people leave their known worlds behind to spend 100 days in the jungles of Borneo. Their mission is to confront one of the great global challenges of our time, saving rainforests and giving hope to endangered orangutans. Their task is enormous and the odds are against them. Jojo, an orphaned baby orangutan, is entrusted in their care and they must find a way to return her to her forest home. To do this, they need to build an orangutan rehabilitation centre and find ways to help the local communities protect their forest. Under the guidance of their mentor Dr Willie Smits, they introduce an innovative satellite monitoring system called Earthwatchers and enlist the help of school students around the world. The system is put to the test when the bulldozers move in and threaten the future of a nearby community living in a traditional longhouse. This is a story about what it takes it be an eco-warrior, an individual willing to step up and take action to avert a global catastrophe taking place before our eyes. The eco-warriors represent a new generation, ready to face what is happening on our planet and willing to do something, no matter how small, to build a more humane and balanced world. For them, every individual matters, every action counts. - Written by Cathy Henkel

Show me the magic : the adventures of Don McAlpine

Synopsis Show Me The Magic takes us on an enthralling and joyful journey into the life and work of the legendary and world-renowned Australian cinematographer, Don McAlpine. A country kid from the small wheat-belt town of Quandialla in isolated south-western New South Wales, Australia, McAlpine was born in 1934 - the year before the first technicolour film was released. There wasn’t even a cinema in Quandialla. Don helped his mother support their family from the age of 14, when his father was stricken by tuberculosis. His part-time job at the Temora chemist as a darkroom photo developer struck a chord in young Don's soul. Soon, a school performance of The Mikado ignited in him the desire to entertain an audience. His fascination with the magical images emerging from his darkroom set him on the winding path that would eventually lead to the glittering lights of Hollywood, where, in 2009, he received the American Society of Cinematographers’ “International Cinematographer of the Year” Award in front of the foremost luminaries of the American film industry. That same year, Don shot his 50th film, X-Men Origins: Wolverine, a big-budget, effects-driven action movie directed by Oscar-winner Gavin Hood and starring Hugh Jackman. Show Me the Magic takes us on set and behind the scenes of that film. In 2011, Don posted another landmark: Mental, a low budget movie directed by PJ Hogan (Muriel’s Wedding, My Best Friend’s Wedding, Peter Pan). Mental was Don’s first digital film and his first Australian film in 25 years. As we travel with Don back into his past, and into the Australian outback landscape that he loves so much, we experience the extremes of movie making: embedded alongside him on the contrasting sets of Wolverine and Mental, we peel back the layers of what Don calls ‘the beautiful deception' of cinema to illuminate the world behind the screen. Joined by celebrated Australian directors Bruce Beresford and Gillian Armstrong, we explore the heritage of the remarkable Australian films that Don photographed, including the iconic Breaker Morant and My Brilliant Career. In Los Angeles, Don reconnects with Paul Mazursky who gave him his big break in Hollywood with Tempest and followed up with Down and Out in Beverly Hills. And two Australians of a later generation - Baz Luhrmann and Catherine Martin - take us behind the scenes on Don’s spectacular creative achievements – Romeo + Juliet and Moulin Rouge! At once the story of a remarkable man and an exploration of filmmaking at the highest level, Show Me The Magic will engage and entrance anyone who has ever been touched by the magic of movies. - See more at: http://www.showmethemagic.com.au/film.htm#synopsis" This film is dedicated to the memory of South African film-maker Peter Henkel, 1924 - 1992.

The burning season

"Every year deliberately lit fires rage across Indonesia. They destroy pristine rainforest, endanger orangutans and contribute to climate change. A young carbon trading entrepreneur goes in search of a solution." "Dorjee Sun, a young Australian Entrepreneur, believes there's money to be made from protecting rainforests in Indonesia, saving the orangutan from extinction and making a real impact on climate change. Armed with a laptop and a backpack, he sets out across the globe to find investors in his carbon trading scheme. It is a battle against time. Achmadi, the palm oil farmer is ready to set fire to his land to plant more palm oil, and Lone's orangutan centre has reached crisis point with over 600 orangutans rescued from the fires. The Burning Season is an eco-thriller about a young man not afraid to confront the biggest challenge of our time."

H I deficiency in cluster spiral galaxies - Dependence on galaxy size

From the available H I data on spiral galaxies in three rich Abell clusters and the Virgo Cluster, it is shown that galaxies with medium to large optical sizes tend to be more severely deficient in atomic hydrogen than the small galaxies. This is so both in terms of the fractional number of galaxies that are deficient and the amount of gas lost by a galaxy. The fraction of H I-deficient galaxies increases with size over most of the size range, saturating or dropping only for the largest galaxies. A comparative study is made of various currently accepted gas removal mechanisms, namely those which are a result of galaxy-intracluster medium interactions, e.g., ram pressure stripping, as well as those due to galaxy-galaxy interactions, i.e., collisions and tidal interactions. It is shown that, with the exception of tidal interactions, all of these mechanisms would produce a size dependence in H I deficiency that is the opposite of that observed. That is, the gas in the largest galaxies would be the least affected by these mechanisms. However, if there is significant mass segregation, these processes may give the trends observed in the size dependence of H I deficiency.