E-Crit

O’Gorman, Marcel

doi:10.3138/9781487571894

Cited by 15 publications

(4 citation statements)

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“…For the diffuse ISM, β takes on the value of 1.6 (Planck Collaboration et al 2014). O'Gorman et al (2015) use a lower value of β = 0.7 based on their own spectral index fits and previous work on mm emission from VY CMa and similar late type stars (e.g. Knapp et al (1993)).…”

Section: Analysis and Discussionmentioning

confidence: 99%

“…Ground-based 2 -5 µm AO imaging with LMIRCam (Skrutskie et al 2010) on the Large Binocular Telescope (LBT) 2 previously reported by Shenoy et al (2013) found VY CMa's peculiar "Southwest Clump" to be a particularly dense, optically thick condensation of the ejecta. Most recently, ALMA sub-millimeter observations have found further discrete, dense ejecta in the very close environment of the star (Richards et al 2014;O'Gorman et al 2015). The mechanisms for such discrete mass loss are not understood.…”

Section: Introductionmentioning

confidence: 99%

“…indicated a dust mass lower limit of 5 × 10 −5 M , with a temperature constrained to be between 80 − 210 K. Interestingly, subsequent ALMA millimeter-range (mm) observations of VY CMa reported byO'Gorman et al (2015) did not detect the Clump at = I neb P / I neb p raw = I raw P / I rawFig. 6.-Estimating the intrinsic polarization of IRC +10420's nebula at K (2.2 µm).…”

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confidence: 95%

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PROBING HYPERGIANT MASS LOSS WITH ADAPTIVE OPTICS IMAGING AND POLARIMETRY IN THE INFRARED: MMT-Pol AND LMIRCam OBSERVATIONS OF IRC +10420 AND VY CANIS MAJORIS

Shenoy

Jones

Packham

et al. 2015

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We present 2 − 5 µm adaptive optics (AO) imaging and polarimetry of the famous hypergiant stars IRC +10420 and VY Canis Majoris. The imaging polarimetry of IRC +10420 with MMT-Pol at 2.2 µm resolves nebular emission with intrinsic polarization of 30%, with a high surface brightness indicating optically thick scattering. The relatively uniform distribution of this polarized emission both radially and azimuthally around the star confirms previous studies that place the scattering dust largely in the plane of the sky. Using constraints on scattered light consistent with the polarimetry at 2.2 µm, extrapolation to wavelengths in the 3 − 5 µm band predicts a scattered light component significantly below the nebular flux that is observed in our LBT/LMIRCam 3 − 5 µm AO imaging. Under the assumption this excess emission is thermal, we find a color temperature of ∼ 500 K is required, well in excess of the emissivity-modified equilibrium temperature for typical astrophysical dust. The nebular features of VY CMa are found to be highly polarized (up to 60%) at 1.3 µm, again with optically thick scattering required to reproduce the observed surface brightness. This star's peculiar nebular feature dubbed the "Southwest Clump" is clearly detected in the 3.1 µm polarimetry as well, which, unlike IRC+10420, is consistent with scattered light alone. The high intrinsic polarizations of both hypergiants' nebulae are compatible with optically thick scattering for typical dust around evolved dusty stars, where the depolarizing effect of multiple scatters is mitigated by the grains' low albedos.

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Section: Analysis and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 95%

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PROBING HYPERGIANT MASS LOSS WITH ADAPTIVE OPTICS IMAGING AND POLARIMETRY IN THE INFRARED: MMT-Pol AND LMIRCam OBSERVATIONS OF IRC +10420 AND VY CANIS MAJORIS

Shenoy

Jones

Packham

et al. 2015

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“…Ser modernos sin dejar de ser tradicionales. Esta máxima condensa, para Edmundo O'Gorman, México, el trauma de su historia (O'Gorman, 1977) y en ella se cristalizan las contradicciones por las que pasaron los gobiernos decimonónicos en todos sus espectros políticos posibles, para contestar una pregunta que atravesó todo el siglo: ¿cómo insertarnos en la Modernidad?…”

Section: Bolívar Echeverría La Modernidad De Lo Barrocounclassified

Un proyecto de modernidad católico: el Ecuador de García Moreno

Pacheco

Patricia²

2018

DRD

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<p class="p1">Al término de las guerras de independencia en la América Latina continental de 1830, los nuevos gobiernos se enfrentaron al problema de construir Estados y naciones sobre las ruinas del antiguo régimen, después de haber destruido –en palabras de Halperin Donghi– el “botín de los vencedores”. Estos procesos ocurrieron de diversas formas a lo largo y ancho del continente; en este trabajo nos enfocamos de modo particular en las reformas eclesiásticas, en ese proceso de independencia de las iglesias locales, de invención de la Iglesia como institución y su posterior secularización, eventos que van de la mano y se entrecruzan con la construcción de los Estados. Trataremos el caso del Ecuador en la década de 1860, cuando Gabriel García Moreno se convirtió en la cabeza de un gobierno conservador y católico que aplicó reformas galicanas y hasta anticlericales haciendo una alianza con la Santa Sede. </p>

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Multimedia and Multitasking: A Survey of Digital Resources for Nineteenth‐Century Literary Studies

Walsh

2013

A Companion to Digital Literary Studies

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E-Crit

Cited by 15 publications

References 0 publications

PROBING HYPERGIANT MASS LOSS WITH ADAPTIVE OPTICS IMAGING AND POLARIMETRY IN THE INFRARED: MMT-Pol AND LMIRCam OBSERVATIONS OF IRC +10420 AND VY CANIS MAJORIS

PROBING HYPERGIANT MASS LOSS WITH ADAPTIVE OPTICS IMAGING AND POLARIMETRY IN THE INFRARED: MMT-Pol AND LMIRCam OBSERVATIONS OF IRC +10420 AND VY CANIS MAJORIS

Un proyecto de modernidad católico: el Ecuador de García Moreno

Multimedia and Multitasking: A Survey of Digital Resources for Nineteenth‐Century Literary Studies

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