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The H2O Southern Galactic Plane Survey (HOPS) – I. Techniques and H2O maser data

Identifieur interne : 006314 ( Main/Exploration ); précédent : 006313; suivant : 006315

The H2O Southern Galactic Plane Survey (HOPS) – I. Techniques and H2O maser data

Auteurs : A. J. Walsh [Australie] ; S. L. Breen [Australie] ; T. Britton [Australie] ; K. J. Brooks [Australie] ; M. G. Burton [Australie] ; M. R. Cunningham [Australie] ; J. A. Green [Australie] ; L. Harvey-Smith [Australie] ; L. Hindson [Australie] ; M. G. Hoare [Royaume-Uni] ; B. Indermuehle [Australie] ; P. A. Jones [Australie, Chili] ; N. Lo [Chili, France] ; S. N. Longmore [États-Unis, Allemagne] ; V. Lowe [Australie] ; C. J. Phillips [Australie] ; C. R. Purcell [Royaume-Uni] ; M. A. Thompson ; J. S. Urquhart [Australie] ; M. A. Voronkov [Australie] ; G. L. White [Australie] ; M. T. Whiting [Australie]

Source :

RBID : ISTEX:30B37BC1FD3C581EDA2A1779E149F97B5651A49B

Descripteurs français

English descriptors

Abstract

We present first results of the H2O Southern Galactic Plane Survey (HOPS), using the Mopra Radio Telescope with a broad‐band backend and a beam size of about 2 arcmin. We have observed 100 deg2 of the southern Galactic plane at 12 mm (19.5–27.5 GHz), including spectral line emission from H2O masers, multiple metastable transitions of ammonia, cyanoacetylene, methanol and radio recombination lines. In this paper, we report on the characteristics of the survey and H2O maser emission. We find 540 H2O masers, of which 334 are new detections. The strongest maser is 3933 Jy and the weakest is 0.7 Jy, with 62 masers over 100 Jy. In 14 maser sites, the spread in the velocity of the H2O maser emission exceeds 100 km s−1. In one region, the H2O maser velocities are separated by 351.3 km s−1. The rms noise levels are typically between 1 and 2 Jy, with 95 per cent of the survey under 2 Jy. We estimate completeness limits of 98 per cent at around 8.4 Jy and 50 per cent at around 5.5 Jy. We estimate that there are between 800 and 1500 H2O masers in the Galaxy that are detectable in a survey with similar completeness limits to HOPS. We report possible masers in NH3 (11,9) and (8,6) emission towards G19.61−0.23 and in the NH3 (3,3) line towards G23.33−0.30.

Url:
DOI: 10.1111/j.1365-2966.2011.19115.x


Affiliations:


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Le document en format XML

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<term>Kakar</term>
<term>Kukolich</term>
<term>Last column</term>
<term>Lilley palmer</term>
<term>Line fwhm</term>
<term>Longitude</term>
<term>Longmore</term>
<term>Main beam brightness temperature</term>
<term>Maser</term>
<term>Maser emission</term>
<term>Maser line</term>
<term>Maser observations</term>
<term>Maser peak</term>
<term>Maser site</term>
<term>Maser sites</term>
<term>Maser spot</term>
<term>Maser spot peak</term>
<term>Maser spots</term>
<term>Masers figure</term>
<term>Mehrotra</term>
<term>Methanol</term>
<term>Methanol masers</term>
<term>Mnras</term>
<term>Monthly notices</term>
<term>Mopra</term>
<term>Mopra beam</term>
<term>Mopra radio telescope</term>
<term>Noise level</term>
<term>Noise levels</term>
<term>Peak temperature</term>
<term>Peak temperature maps</term>
<term>Phys</term>
<term>Plane survey</term>
<term>Poynter</term>
<term>Poynter kakar</term>
<term>Previous detection</term>
<term>Radio recombination lines</term>
<term>Recombination</term>
<term>Scaleheight</term>
<term>Single channel</term>
<term>Source name</term>
<term>Spectral line emission</term>
<term>Spectral line frequency</term>
<term>Spectral lines</term>
<term>Standard deviation</term>
<term>Star formation</term>
<term>Straight line</term>
<term>Strongest maser spot</term>
<term>Strongest maser spot peak</term>
<term>Strongest maser spot velocity</term>
<term>Survey region</term>
<term>System temperature</term>
<term>Tracer</term>
<term>Tted gaussian</term>
<term>Urquhart</term>
<term>Velocity density</term>
<term>Velocity fwhm density</term>
<term>Velocity range</term>
<term>Walsh</term>
<term>Water fountain</term>
<term>Water masers</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr">
<term>Méthanol</term>
<term>Niveau sonore</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front>
<div type="abstract" xml:lang="en">We present first results of the H2O Southern Galactic Plane Survey (HOPS), using the Mopra Radio Telescope with a broad‐band backend and a beam size of about 2 arcmin. We have observed 100 deg2 of the southern Galactic plane at 12 mm (19.5–27.5 GHz), including spectral line emission from H2O masers, multiple metastable transitions of ammonia, cyanoacetylene, methanol and radio recombination lines. In this paper, we report on the characteristics of the survey and H2O maser emission. We find 540 H2O masers, of which 334 are new detections. The strongest maser is 3933 Jy and the weakest is 0.7 Jy, with 62 masers over 100 Jy. In 14 maser sites, the spread in the velocity of the H2O maser emission exceeds 100 km s−1. In one region, the H2O maser velocities are separated by 351.3 km s−1. The rms noise levels are typically between 1 and 2 Jy, with 95 per cent of the survey under 2 Jy. We estimate completeness limits of 98 per cent at around 8.4 Jy and 50 per cent at around 5.5 Jy. We estimate that there are between 800 and 1500 H2O masers in the Galaxy that are detectable in a survey with similar completeness limits to HOPS. We report possible masers in NH3 (11,9) and (8,6) emission towards G19.61−0.23 and in the NH3 (3,3) line towards G23.33−0.30.</div>
</front>
</TEI>
<affiliations>
<list>
<country>
<li>Allemagne</li>
<li>Australie</li>
<li>Chili</li>
<li>France</li>
<li>Royaume-Uni</li>
<li>États-Unis</li>
</country>
<region>
<li>Angleterre</li>
<li>Massachusetts</li>
<li>Yorkshire-et-Humber</li>
<li>Île-de-France</li>
</region>
<settlement>
<li>Gif‐sur‐Yvette</li>
<li>Leeds</li>
</settlement>
<orgName>
<li>Université de Leeds</li>
</orgName>
</list>
<tree>
<noCountry>
<name sortKey="Thompson, M A" sort="Thompson, M A" uniqKey="Thompson M" first="M. A." last="Thompson">M. A. Thompson</name>
</noCountry>
<country name="Australie">
<noRegion>
<name sortKey="Walsh, A J" sort="Walsh, A J" uniqKey="Walsh A" first="A. J." last="Walsh">A. J. Walsh</name>
</noRegion>
<name sortKey="Breen, S L" sort="Breen, S L" uniqKey="Breen S" first="S. L." last="Breen">S. L. Breen</name>
<name sortKey="Britton, T" sort="Britton, T" uniqKey="Britton T" first="T." last="Britton">T. Britton</name>
<name sortKey="Brooks, K J" sort="Brooks, K J" uniqKey="Brooks K" first="K. J." last="Brooks">K. J. Brooks</name>
<name sortKey="Burton, M G" sort="Burton, M G" uniqKey="Burton M" first="M. G." last="Burton">M. G. Burton</name>
<name sortKey="Cunningham, M R" sort="Cunningham, M R" uniqKey="Cunningham M" first="M. R." last="Cunningham">M. R. Cunningham</name>
<name sortKey="Green, J A" sort="Green, J A" uniqKey="Green J" first="J. A." last="Green">J. A. Green</name>
<name sortKey="Harvey Mith, L" sort="Harvey Mith, L" uniqKey="Harvey Mith L" first="L." last="Harvey-Smith">L. Harvey-Smith</name>
<name sortKey="Hindson, L" sort="Hindson, L" uniqKey="Hindson L" first="L." last="Hindson">L. Hindson</name>
<name sortKey="Indermuehle, B" sort="Indermuehle, B" uniqKey="Indermuehle B" first="B." last="Indermuehle">B. Indermuehle</name>
<name sortKey="Jones, P A" sort="Jones, P A" uniqKey="Jones P" first="P. A." last="Jones">P. A. Jones</name>
<name sortKey="Lowe, V" sort="Lowe, V" uniqKey="Lowe V" first="V." last="Lowe">V. Lowe</name>
<name sortKey="Lowe, V" sort="Lowe, V" uniqKey="Lowe V" first="V." last="Lowe">V. Lowe</name>
<name sortKey="Phillips, C J" sort="Phillips, C J" uniqKey="Phillips C" first="C. J." last="Phillips">C. J. Phillips</name>
<name sortKey="Urquhart, J S" sort="Urquhart, J S" uniqKey="Urquhart J" first="J. S." last="Urquhart">J. S. Urquhart</name>
<name sortKey="Voronkov, M A" sort="Voronkov, M A" uniqKey="Voronkov M" first="M. A." last="Voronkov">M. A. Voronkov</name>
<name sortKey="Walsh, A J" sort="Walsh, A J" uniqKey="Walsh A" first="A. J." last="Walsh">A. J. Walsh</name>
<name sortKey="White, G L" sort="White, G L" uniqKey="White G" first="G. L." last="White">G. L. White</name>
<name sortKey="Whiting, M T" sort="Whiting, M T" uniqKey="Whiting M" first="M. T." last="Whiting">M. T. Whiting</name>
</country>
<country name="Royaume-Uni">
<region name="Angleterre">
<name sortKey="Hoare, M G" sort="Hoare, M G" uniqKey="Hoare M" first="M. G." last="Hoare">M. G. Hoare</name>
</region>
<name sortKey="Purcell, C R" sort="Purcell, C R" uniqKey="Purcell C" first="C. R." last="Purcell">C. R. Purcell</name>
</country>
<country name="Chili">
<noRegion>
<name sortKey="Jones, P A" sort="Jones, P A" uniqKey="Jones P" first="P. A." last="Jones">P. A. Jones</name>
</noRegion>
<name sortKey="Lo, N" sort="Lo, N" uniqKey="Lo N" first="N." last="Lo">N. Lo</name>
</country>
<country name="France">
<region name="Île-de-France">
<name sortKey="Lo, N" sort="Lo, N" uniqKey="Lo N" first="N." last="Lo">N. Lo</name>
</region>
</country>
<country name="États-Unis">
<region name="Massachusetts">
<name sortKey="Longmore, S N" sort="Longmore, S N" uniqKey="Longmore S" first="S. N." last="Longmore">S. N. Longmore</name>
</region>
</country>
<country name="Allemagne">
<noRegion>
<name sortKey="Longmore, S N" sort="Longmore, S N" uniqKey="Longmore S" first="S. N." last="Longmore">S. N. Longmore</name>
</noRegion>
</country>
</tree>
</affiliations>
</record>

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