In recent years, an increasing number of publications have been devoted to the peculiar and mysterious pre-main-sequence star V582 Mon, also known as KH 15D. This extraordinary T Tauri star, located ...in the young star cluster NGC 2264, appears to be an eclipsing variable. In the present paper, we report a unique and self-consistent set of light curves in the blue and near-infrared (IR) bands, spanning a 15-yr interval (epoch 1955–1970). Our photometric data show clearly that the beginning of the eclipse stage occurred in early 1958 in the blue, and perhaps around 4 yr later in the IR. The light-curve period turns out to be the same reported by recent observations (about 48.3 d), so that no evidence for a period change Results. On the other hand, in our data the light-curve shape appears to be sinusoidal and is therefore different from the one displayed today. The photometric behaviour, determined with time-series and colour-index analysis, suggests that V582 Mon (KH 15D) could initially be surrounded by an accretion disc/torus seen edge-on, with subsequent thin dust formation at the beginning of the blue radiation absorption. The dust could then aggregate into larger particles providing the transition between selective and total absorption, accompanied with eclipsing variability in the IR. The minima of the periodic light curve become deeper owing to the increasing dimension and number of dust grains, and then flatten owing to a contraction in the disc.
INFRARED OBJECT IN THE REGION OF IC 1805 MAFFEI, PAOLO
Publications of the Astronomical Society of the Pacific,
10/1968, Letnik:
80, Številka:
476
Journal Article
Mon.Not.Roy.Astron.Soc. 357 (2005) 1059-1067 In recent years, an increasing number of publications have been addressed to
the peculiar and mysterious pre-main sequence star V582 Mon, also known as KH
...15D. This extraordinary T Tauri star, located in the young star cluster NGC
2264, appears as to be an eclipsing variable. In the present paper, we report a
unique and self-consistent set of light curves in the blue and near-infrared
bands, spanning a 15-year interval (epoch 1955-1970). Our photometric data show
clearly the beginning of the eclipse stage occurred in early 1958 in the blue,
and perhaps around four years later in the infrared. The light curve period
turns out to be the same reported by recent observations (about 48.3 days), so
that no evidence for a period change results. On the other hand, in our data
the light curve shape appears as sinusoidal and is therefore different from the
one displayed today. The photometric behaviour, determined with time-series and
colour-index analysis, suggests that V582 Mon (KH 15D) could be initially
surrounded by an accretion disk/torus seen edge-on, with subsequent thin dust
formation at the beginning of the blue radiation absorption. The dust could
then aggregate into larger particles providing the transition between selective
and total absorption, accompanied with eclipsing variability in the infrared.
The minima of the periodic light curve become deeper due to the increasing
dimension and number of dust grains, and then flattens due to a contraction in
the disk.
Meditazione contemplante il sacramento del corpo di Gesù Cristo. Segue: Trattatello di comunione. - Stampato in Venetia : per Antonio di Zanchi dicto bergamasco, nel mille quatro centro novanta octo ...Adi XXII de zenaro. - 72 c. ; *⁴, a-b⁸, c-d⁴, e-f⁶, g⁸, h⁶, i2, k-l⁴, m-n⁶ ; fol.
Meditazione contemplante il sacramento del corpo di Gesù Cristo. Segue: Trattatello di comunione. - Stampato in Venetia : per Antonio di Zanchi dicto bergamasco, nel mille quatro centro novanta octo Adi XXII de zenaro. - 72 c. ; *⁴, a-b⁸, c-d⁴, e-f⁶, g⁸, h⁶, i2, k-l⁴, m-n⁶ ; fol.
Meditation contemplating the sacrament of Jesus Christ's body. Next: Communion Treat. - Printed in Venetia: by Mistro Pietro da Pavia, in the year of the MCCCCC of XII of the month of decembrio. - 72 ...c. ; a-m a-; fol. - Typographical mark in Mar. - The c is missing. m6
Meditazione contemplante il sacramento del corpo di Gesù Cristo. Segue: Trattatello di comunione. - Stampato in Venetia : per maistro Pietro da Pavia, nel anno del MCCCCC adi XII del mese de decembrio. - 72 c. ; a-m⁶ ; fol. - Marca tipografica nell'explicit. - Manca la c. m6
Meditazione contemplante il sacramento del corpo di Gesù Cristo. Segue: Trattatello di comunione. - Stampato in Venetia : per maistro Pietro da Pavia, nel anno del MCCCCC adi XII del mese de decembrio. - 72 c. ; a-m⁶ ; fol. - Marca tipografica nell'explicit. - Manca la c. m6
In recent years, an increasing number of publications have been addressed to the peculiar and mysterious pre-main sequence star V582 Mon, also known as KH 15D. This extraordinary T Tauri star, ...located in the young star cluster NGC 2264, appears as to be an eclipsing variable. In the present paper, we report a unique and self-consistent set of light curves in the blue and near-infrared bands, spanning a 15-year interval (epoch 1955-1970). Our photometric data show clearly the beginning of the eclipse stage occurred in early 1958 in the blue, and perhaps around four years later in the infrared. The light curve period turns out to be the same reported by recent observations (about 48.3 days), so that no evidence for a period change results. On the other hand, in our data the light curve shape appears as sinusoidal and is therefore different from the one displayed today. The photometric behaviour, determined with time-series and colour-index analysis, suggests that V582 Mon (KH 15D) could be initially surrounded by an accretion disk/torus seen edge-on, with subsequent thin dust formation at the beginning of the blue radiation absorption. The dust could then aggregate into larger particles providing the transition between selective and total absorption, accompanied with eclipsing variability in the infrared. The minima of the periodic light curve become deeper due to the increasing dimension and number of dust grains, and then flattens due to a contraction in the disk.
Norman Bel Geddes (1893-1958) was one of America's most prominent industrial designers working between 1927 and 1950. My study investigates his designs and rhetoric as rational and non-rational ...expressions of modernity. The aspects of modernity explored include: modernism, mass culture, consumption, production, identity and gender. The study investigates Bel Geddes's designs of stage sets, architecture, products, and world fair exhibits, and the rhetoric he used to promote such designs. Through such projects and their emphases on art, desire, intuition, spirituality, order, and science, Bel Geddes fashioned his image as a 'practical visionary'. Chapter one, 'Both Artist-Engineer and Practical Visionary: The Imaging of Industrial Design in Horizons (1932)', investigates how Bel Geddes sought to present the field of industrial design as one of logic and foresight, by promoting himself, and by proxy all industrial designers, as rational and imaginative artist-engineers. This dual discourse was offered in Bel Geddes's monograph Horizons -the central focus of this chapter. Chapter two, 'Shaping the Audiences of Dramatic Design', explores Bel Geddes's move from advertising and stage design in the 1910s and 1920s to architectural design, investigating in particular his designs (1928-1932) of theatres, window displays, an advertising agency auditorium, and a restaurant for the Chicago World's Fair of 1933. In the creation of these designs Bel Geddes was informed by his knowledge of drama, psychology and audience behaviour. Such architectural designs were meant to impress, excite and transform their audiences -to encourage emotional, psychological or ideological change. Chapter three, 'Industrial Architecture: The Factory, Petrol Station Design and the Mass Produced Home', explores the rhetoric and designs which expressed Bel Geddes's belief in the material benefits of industrial production and the symbolic value of the machine. The chapter looks at Bel Geddes's designs (1929-1945) of a factory development, a petrol station, and a mass production house. These designs were intended to promote Bel Geddes and his clients as progressive, modern and far-sighted, and presented the machine as both rational and non-rational, with the ability to both order society and provide it with a spiritual basis. Chapter four, 'Streamlining: Both a Mechanical and Organic Aesthetic', investigates Bel Geddes's streamlined designs (1928 -1950) of vehicles and other products and their accompanying rhetoric. The chapter explores Bel Geddes's flexible streamlined aesthetic, which alternately foregrounded mechanical and natural aspects, depending on the era and the requirements of the design. Chapter five, 'Consumer Research: Constructing the Ideal Consumer and a Popular and Modern Aesthetic, 1930-1945', investigates NBG & Company's consumer surveys and resulting design recommendations which sought to promote a modern, popular and technologically progressive style aimed at purchasers with average tastes and middle incomes. Chapter six, 'Futurama and the War Models Exhibit: The Production and Consumption of Model Worlds and Bel Geddes's Masculine Image', explores the creation and reception of three of Bel Geddes's miniature modelling projects, his futuristic model cities created for a Shell Oil advertising campaign (1937) and for the General Motors Futurama shown at the New York World's Fair (1939-40), and the models depicting World War II battles built and photographed for Life magazine (1942), and exhibited at the Museum of Modern Art (1944). Such projects helped to create a masculine and prophetic image for Bel Geddes.
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