O'Halloran, B;
Galametz, M;
Madden, SC;
Auld, R;
Baes, M;
Barlow, MJ;
Bendo, GJ;
... Zeilinger, WW; + view all
(2010)
Herschel photometric observations of the low metallicity dwarf galaxy NGC 1705.
Astronomy & Astrophysics
, 518
, Article L58. 10.1051/0004-6361/201014580.
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Abstract
We present Herschel SPIRE and PACS photometeric observations of the low metallicity (Z ~ 0.35 ) nearby dwarf galaxy, NGC 1705, in six wavelength bands as part of the Dwarf Galaxy Survey guaranteed time Herschel key program. We confirm the presence of two dominant circumnuclear IR-bright regions surrounding the central super star cluster that had been previously noted at mid-IR wavelengths and in the sub-mm by LABOCA. On constructing a global spectral energy distribution using the SPIRE and PACS photometry, in conjunction with archival IR measurements, we note the presence of an excess at sub-mm wavelengths. This excess suggests the presence of a signiPcant cold dust component within NGC 1705 and was modeled as an additional cold component in the SED. Although alternative explanations for the sub-mm excess beyond 350 μm, such as changes to the dust emissivity cannot be ruled out, the most likely explanation for the observed submillimetre excess is that of an additional cold dust component.
| Type: | Article |
|---|---|
| Title: | Herschel photometric observations of the low metallicity dwarf galaxy NGC 1705 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1051/0004-6361/201014580 |
| Publisher version: | https://doi.org/10.1051/0004-6361/201014580 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | galaxies: dwarf / dust, extinction / evolution |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10095316 |
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