The Galactic centre mini-spiral in the mm-regime

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F12%3A00374254" target="_blank" >RIV/67985815:_____/12:00374254 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1051/0004-6361/201117676" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201117676</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/201117676" target="_blank" >10.1051/0004-6361/201117676</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Galactic centre mini-spiral in the mm-regime

Popis výsledku v původním jazyce

Our observations were carried out at 1.3?mm and 3?mm with the mm interferometric array CARMA in California in March and April 2009, with the MIR instrument VISIR at ESO?s VLT in June 2006, and the NIR Br? with VLT NACO in August 2009. We present high resolution maps of the mini-spiral, and obtain a spectral index of 0.5 for Sgr A*, indicating an inverted synchrotron spectrum. We find electron densities within the range 0.8-1.5? ?10^4?cm-3 for the mini-spiral from the radio continuum maps, along with a dust mass contribution of 0.25?M_S from the MIR dust continuum, and extinctions ranging from 1.8?3 in the Br? line. We observe a mixture of negative and positive spectral indices, which we interpret as evidence that there are a range of contributions to the thermal free-free emission by the ionized gas emission and by dust at 1.3?mm.

Název v anglickém jazyce

The Galactic centre mini-spiral in the mm-regime

Popis výsledku anglicky

Our observations were carried out at 1.3?mm and 3?mm with the mm interferometric array CARMA in California in March and April 2009, with the MIR instrument VISIR at ESO?s VLT in June 2006, and the NIR Br? with VLT NACO in August 2009. We present high resolution maps of the mini-spiral, and obtain a spectral index of 0.5 for Sgr A*, indicating an inverted synchrotron spectrum. We find electron densities within the range 0.8-1.5? ?10^4?cm-3 for the mini-spiral from the radio continuum maps, along with a dust mass contribution of 0.25?M_S from the MIR dust continuum, and extinctions ranging from 1.8?3 in the Br? line. We observe a mixture of negative and positive spectral indices, which we interpret as evidence that there are a range of contributions to the thermal free-free emission by the ionized gas emission and by dust at 1.3?mm.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

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Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Astronomy & Astrophysics

ISSN

0004-6361

e-ISSN

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Svazek periodika

538

Číslo periodika v rámci svazku

February

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

8

Strana od-do

"A127/1"-"A127/8"

Kód UT WoS článku

000300614100127

EID výsledku v databázi Scopus

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