Detection of Strong Winds in Giant Extragalactic HII Regions

1991 ◽  
pp. 423-423
Author(s):  
H. O. Castañeda ◽  
J. M. Vilchez
Keyword(s):  
Hii Regions ◽  
Strong Winds

scholarly journals Detection of Strong Winds in Giant Extragalactic HII Regions

1991 ◽  
Vol 143 ◽  
pp. 423-423
Author(s):  
H.O. Castañeda ◽  
J.M. Vilchez
Keyword(s):  
Supernova Remnants ◽  
Hii Regions ◽  
Stellar Winds ◽  
Preliminary Results ◽  
Low Intensity ◽  
Large Velocity ◽  
Strong Winds ◽  
Ccd Detectors ◽  
Very High

The existence of supernova remnants and strong stellar winds in giant extragalactic HII regions should be associated with the existence of gas at very high velocities (≈ 102 − 103 km s–1). The detection of large velocity/low intensity gas within the regions could be possible with the use of CCD detectors with long slit intermediate spectroscopy and long integration times. To test this observational approach we have conducted a survey in the brightest giant HII regions of M 101 and M 51. We report on the preliminary results of our programme, and discuss the implications for the energetics of the regions.

Teresa Mannion and the Emergence of Extreme Weather Culture in Ireland

2019 ◽  
Vol 49 (1) ◽  
pp. 135-150
Author(s):  
Diane Negra
Keyword(s):  
Climate Change ◽  
At Risk ◽  
Popular Culture ◽  
Extreme Weather ◽  
Cross Cultural ◽  
Viral Video ◽  
Cultural Information ◽  
Strong Winds ◽  
Risk Coverage

In this article I consider how registers of weather media carry/convey cultural information, specifically how texts about extreme weather articulate with investment in a supposed post-recession restored normality marked by the Irish government's commitment to deregulated transnational capitalism. I maintain that, in a process of cross-cultural remediation, sensationalist codes of US weather media that discursively manage awareness of systemic climate problems are just starting to infiltrate the Irish broadcasting environment. In early December 2015 RTÉ’s Teresa Mannion covered a strong gale, Storm Desmond, amidst inclement conditions in Salthill, Co Galway. Modelling the kind of ‘body at risk’ coverage consummately performed by US Weather Channel personnel, Mannion could barely speak over the lashing rain and strong winds in a dramatic broadcast that quickly became a viral video. This article analyses the fascination with Mannion's piece and its memetic, and attends to the nature of the pleasure taken in her on-camera discomfiture and the breach of gendered territory committed by Mannion at a time when national popular culture in Ireland is under increased obligation to identify and explain climate change-related extreme weather.

POLAR LOW DETECTION USING SOLAB SIOWS ARCTIC PORTAL

2017 ◽  
Author(s):  
Olga Mashtaler ◽  
Olga Mashtaler ◽  
Alexander Myasoedov ◽  
Alexander Myasoedov ◽  
Elizaveta Zabolotskikh ◽  
...  
Keyword(s):  
Model Development ◽  
Sharp Decrease ◽  
Open Water ◽  
The Arctic ◽  
Wind Fields ◽  
Polar Lows ◽  
Statistical Regularities ◽  
Meteorological Observations ◽  
Strong Winds ◽  
Synthetic Aperture Radars

The relevance of the polar lows (PLs) research is justified by their great destructive power and creation of threat to the safety of navigation in the high latitudes and along the Northern Sea Route. The most dangerous effects on maritime activities are strong winds, waves and icing. In addition, the study of the PLs acquires relevance due to the sharp decrease of the sea ice area in the Arctic in recent years and the emergence of areas of open water, suitable for the appearance and development of PLs. However, despite the importance of PLs, they are apparently not sufficiently studied. As there are no meteorological observations in the areas of their appearance, the main source of information about them are satellite observations. By using images on the SOLab SIOWS Arctic Portal from multiple satellites operating in the IR and visible ranges (e.g., MODIS and AVHRR), and using near-water wind fields from high resolution synthetic aperture radars (Sentine-1, ASAR) and low resolution scatterometers (ASCAT), we identify polar lows in various parts of the Arctic, revealing statistical regularities in the appearance of PLs, their distribution and intensity. Collected database of Pls and their characteristics will be used for further PLs forecasting model development.

A case study of strong winds at an Arctic front

1999 ◽  
Vol 51 (5) ◽  
pp. 865-879 ◽  
Author(s):  
Sigbjørn Grønås ◽  
Paul Skeie
Keyword(s):  
Arctic Front ◽  
Strong Winds

Preliminary Observations of Interstellar Sodium D-Line Absorption towards the Carina Nebula

1980 ◽  
Vol 4 (1) ◽  
pp. 95-97 ◽  
Author(s):  
J. B. Whiteoak ◽  
F. F. Gardner
Keyword(s):  
High Resolution ◽  
Hii Regions ◽  
Early Type ◽  
Interstellar Clouds ◽  
Carina Nebula ◽  
Line Absorption ◽  
General Investigation ◽  
Early Type Stars ◽  
Resolution Study

As part of a general investigation of interstellar clouds associated with southern HII regions we have begun a high-resolution study of the sodium D-line absorption in the directions of early-type stars that are likely to be associated with or located behind the clouds.

14 years of 6.7 GHz periodic methanol maser observations towards G188.95+0.89

2019 ◽  
Vol 15 (S356) ◽  
pp. 393-394
Author(s):  
Martin M. Mutie ◽  
Paul Baki ◽  
James O. Chibueze ◽  
Khadija El Bouchefry
Keyword(s):  
Radio Telescope ◽  
Exponential Decay ◽  
Hii Regions ◽  
Monitoring Period ◽  
Methanol Maser ◽  
Spectral Components ◽  
Methanol Masers ◽  
Compact Hii Regions

AbstractWe report the results of 14 years of monitoring of G188.95+0.89 periodic 6.7 GHz methanol masers using the Hartebeesthoek 26-m radio telescope. G188.95+0.89 (S252, AFGL5180) is a radio-quiet methanol maser site that is often interpreted as precursors of ultra-compact HII regions or massive protostar sites. At least five bright spectral components were identified. The maser feature at 11.36 km s-1 was found to experience an exponential decay during the monitoring period. The millimetre continuum reveals two cores associated with the source.

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