Interferometric confirmation of ‘water fountain’ candidates
نویسندگان
چکیده
منابع مشابه
First detection of CO lines in a water fountain star
Context. Water fountain stars are very young post-AGB stars with high velocity water maser jets. They are the best objects to study the onset of bipolar jets from evolved stars due to their young dynamical ages. However, none of them have been observed in any thermal lines. Aims. Search for CO lines in the water fountain star IRAS 16342-3814 and investigate the properties of its thermal gas. Me...
متن کاملobservations of the “ water fountain ” IRAS 16552 − 3050
We present Very Large Array (VLA) observations of the water maser emission towards IRAS 16552-3050. The maser emission shows a velocity spread of ≃ 170 km s, and a bipolar distribution with a separation between the red and blueshifted groups of≃ 0.08. These observations and the likely post-AGB nature of the source indicate that IRAS 16552-3050 can be considered as a member of the “water fountai...
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Since Babagorgorfountain in the Ghorveh city of Kurdistan province is located in the arsenic belt of Iran, to raise awareness about the quality of drinking water from this fountain the concentration of arsenic and other heavy metals as well as other physicochemical parameters were investigated to protect the public health. In this study, water samples were collected from Babagorgorfountain. Ars...
متن کاملFountain rainbows.
We present the first measurements of radiance spectra of rainbows. The bows on two sunny days (3 and 6 June 2008) were produced by the fountain in the Parque de las Ciencias, Granada, Spain, that consists of a rectangular perimeter of 40 spray nozzles. Optical thickness of the spray from each nozzle was approximately 0.5. Spectral purity of the primary bow was highest for orange and blue, reach...
متن کاملFountain Codes
Fountain codes are record-breaking sparse-graph codes for channels with erasures – such as the internet, where files are transmitted in multiple small packets, each of which is either received without error or not received. Standard file-transfer protocols simply chop a file up into K packet-sized pieces, then repeatedly transmit each packet until it is successfully received. A back-channel is ...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2017
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/stx650