Jean Piaget

Munari, Alberto

doi:10.1007/bf02199023

Cited by 15 publications

(6 citation statements)

References 3 publications

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“…Prior to our observations, the only evidence for spatially resolved outflows from CH Cyg was the spectacular radio jet discovered by TSM86, subsequent radio imagery by Crocker et al (2001), and the optical spectroscopy of Solf (1987) andTomov et al (1996) limited to the innermost arcsecond. With our optical data, in principle we have the opportunity of exploring how the jet has evolved 12 to 15 years after its production.…”

Section: The Origin Of the Optical Nebulamentioning

confidence: 92%

“…As with the cool component of CH Cyg, the study of the UBV lightcurve from 1885 to 1988 (Mikolajewski et al 1990) and of JHKLM photometric data for the last 25 yrs (Munari et al 1996, Taranova & Shenavrin 2000 have revealed the following properties: i) low-amplitude optical and near-IR variability with several periodicities (100, 770 1300, and 1980 days); ii) a secular decrease in the mean luminosity of the red giant (△V ≥ 3 − 4 mag over 120 yrs, with a rapid acceleration in the last 40 yrs); iii) variable obscuration from several episodes of dust condensation in the giant wind; and iv) infrared properties typical of the bulge/thick-disk population of the Galaxy, favouring a red giant mass around 1 M ⊙ .…”

Section: Basic Parameters Of the Systemmentioning

confidence: 99%

“…The most accepted orbital period for the CH Cyg symbiotic system is around 15.5 yrs with hints of an eclipsing nature (Mikolajewski et al 1990), although some debate has been raised in recent years following the claim by Hinkle et al (1993) that the system might be triple, with 2 and 15.5 yrs orbital periods, a claim not supported by the analysis of Munari et al (1996).…”

Section: Basic Parameters Of the Systemmentioning

confidence: 99%

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The Large‐Scale Ionized Outflow of CH Cygni

Corradi

Munari

Livio

et al. 2001

ApJ

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HST and ground-based [O II] and [N II] images obtained in the period 1996-1999 reveal a complex, ionized optical nebula around the symbiotic binary CH Cyg extending out to 18 ′′ or 5000 A.U. from the central stars.The observed velocity range of the nebula, derived from long-slit echelle spectra, is 130 km s −1 . In spite of its complex appearance, the velocity data show that the basic morphology of the inner regions of the optical nebula is that of a bipolar outflow extending nearly along the plane of the sky out to some 2000 A.U. from the center.Even if the extension of this bipolar outflow and its position angle are consistent with those of the radio jet produced in 1984 (extrapolated to the time of our optical imagery), no obvious optical counterpart is visible of the original, dense radio bullets ejected by the system. We speculate that the optical bipolar outflow might be the remnant of the interaction of the bullets with a relatively dense circumstellar medium. Subject headings: binaries: symbiotic -ISM : jets and outflows -Stars: mass loss -Stars: CH Cyg 1 Based on observations obtained at the 4.2m WHT and 2.6m NOT telescopes operated on the island of La Palma by the ING and the NOTSA, respectively, in the Spanish Observatorio del Roque de Los Muchachos (ORM) of the Insti-

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Section: The Origin Of the Optical Nebulamentioning

confidence: 92%

Section: Basic Parameters Of the Systemmentioning

confidence: 99%

Section: Basic Parameters Of the Systemmentioning

confidence: 99%

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The Large‐Scale Ionized Outflow of CH Cygni

Corradi

Munari

Livio

et al. 2001

ApJ

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“…The 1936-38 event could have been one of the usual low-amplitude, long-lasting outbursts that symbiotic binaries frequently display. Two such active phases during the 1990s were reported and discussed by Munari et al (1994), Kolotilov et al (1998, 2003, hereafter K98 andK03), and some earlier ones can E-mail: ulisse.munari@oapd.inaf.it be spotted in the historical light curves of V407 Cyg by M90 and Munari & Jurdana-Šepić (2002).…”

Section: Introductionmentioning

confidence: 89%

The 2010 nova outburst of the symbiotic Mira V407 Cyg

Munari

Joshi

Ashok

et al. 2011

Monthly Notices of the Royal Astronomical Society: Letters

108

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The nova outburst experienced in 2010 by the symbiotic binary Mira V407 Cyg has been extensively studied at optical and infrared wavelengths with both photometric and spectroscopic observations. This outburst, reminiscent of similar events displayed by RS Oph, can be described as a very fast He/N nova erupting while being deeply embedded in the dense wind of its cool giant companion. The hard radiation from the initial thermonuclear flash ionizes and excites the wind of the Mira over great distances (recombination is observed on a time scale of 4 days). The nova ejecta is found to progressively decelerate with time as it expands into the Mira wind. This is deduced from line widths which change from a FWHM of 2760 km/s on day +2.3 to 200 km/s on day +196. The wind of the Mira is massive and extended enough for an outer neutral and unperturbed region to survive at all outburst phases.Comment: MNRAS Letter, in pres

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“…Piaget já dizia que, na experimentação, o papel do professor é central [52], pois é uma ilusão acreditar que o aluno desenvolverá a tarefa sozinho.…”

Section: /12/2016unclassified

Produção científica sobre estratégias didáticas utilizadas no ensino de Bioquímica: uma revisão sistemática

Silveira¹,

Rocha²

2016

Rev. Ens. Bioq.

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The aim of this study was to know teaching strategies undertaken by biochemistry teachers in higher education. A systematic review of the literature was conducted, and was included articles developed in Brazilian universities, published in the 2004-2015 period, with descriptors learning, biochemistry and graduation. 40 publications were found, and 2004 was the year with most studies (n=7). The most common activities were conducting experimental activity (32,5%), development of various teaching tools (22,5%), use of Problem-based Learning (20%), use of information technologies (17,5%) and development courses (7,5%). Thus, it was observed that there are groups of teachers working with different teaching strategies seeking to improve student learning. The production and publication of knowledge in teaching in biochemistry can help this process.

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Jean Piaget

Cited by 15 publications

References 3 publications

The Large‐Scale Ionized Outflow of CH Cygni

The Large‐Scale Ionized Outflow of CH Cygni

The 2010 nova outburst of the symbiotic Mira V407 Cyg

Produção científica sobre estratégias didáticas utilizadas no ensino de Bioquímica: uma revisão sistemática

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