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The Galactic centre mini-spiral in the mm-regime

The result's identifiers

  • Result code in 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>

  • Result on the web

    <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>

Alternative languages

  • Result language

    angličtina

  • Original language name

    The Galactic centre mini-spiral in the mm-regime

  • Original language description

    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.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    BN - Astronomy and celestial mechanics, astrophysics

  • OECD FORD branch

Result continuities

  • Project

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2012

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Astronomy & Astrophysics

  • ISSN

    0004-6361

  • e-ISSN

  • Volume of the periodical

    538

  • Issue of the periodical within the volume

    February

  • Country of publishing house

    FR - FRANCE

  • Number of pages

    8

  • Pages from-to

    "A127/1"-"A127/8"

  • UT code for WoS article

    000300614100127

  • EID of the result in the Scopus database