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Herschel photometric observations of the low metallicity dwarf galaxy NGC 1705

O'Halloran, B. and Bock, J. J. and Bradford, M. and Levenson, L. R. and Lu, N. and Schulz, B. (2010) Herschel photometric observations of the low metallicity dwarf galaxy NGC 1705. Astronomy and Astrophysics, 518 . L58. ISSN 0004-6361. http://resolver.caltech.edu/CaltechAUTHORS:20101124-111335303

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Abstract

We present Herschel SPIRE and PACS photometeric observations of the low metallicity (Z ~ 0.35 Z_☉) 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 significant 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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1051/0004-6361/201014580DOIArticle
http://www.aanda.org/index.php?option=com_article&access=doi&doi=10.1051/0004-6361/201014580&Itemid=129PublisherArticle
ORCID:
AuthorORCID
Lu, N.0000-0002-8948-1044
Additional Information:© 2010 ESO. Received 30 March 2010; Accepted 11 May 2010; Published online 16 July 2010. SPIRE has been developed by a consortium of institutes led by Cardiff University (UK) and including Univ. Lethbridge (Canada); NAOC (China); CEA, OAMP (France); IFSI, Univ. Padua (Italy); IAC (Spain); Stockholm Observatory (Sweden); Imperial College London, RAL, UCLMSSL, UKATC, Univ. Sussex (UK); and Caltech/JPL, IPAC, Univ. Colorado (USA). This development has been supported by national funding agencies: CSA (Canada); NAOC (China); CEA, CNES, CNRS (France); ASI (Italy); MCINN (Spain); Stockholm Observatory (Sweden); STFC (UK); and NASA (USA). PACS has been developed by a consortium of institutes led by MPE (Germany) and including UVIE (Austria); KUL, CSL, IMEC (Belgium); CEA, OAMP (France); MPIA (Germany); IFSI, OAP/AOT, OAA/CAISMI, LENS, SISSA (Italy); IAC (Spain). This development has been supported by the funding agencies BMVIT (Austria), ESA-PRODEX (Belgium), CEA/CNES (France), DLR (Germany), ASI (Italy), and CICT/MCT (Spain).
Group:Infrared Processing and Analysis Center (IPAC)
Funders:
Funding AgencyGrant Number
Canadian Space Agency (CSA) UNSPECIFIED
National Astronomical Observatories, Chinese Academy of Sciences (NAOC) UNSPECIFIED
Commissariat à l'Énergie Atomique (CEA)UNSPECIFIED
Centre National d'Études Spatiales (CNES)UNSPECIFIED
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Agenzia Spaziale Italiana (ASI)UNSPECIFIED
Ministerio de Ciencia e Innovación (MICIIN)UNSPECIFIED
Stockholm ObservatoryUNSPECIFIED
Science and Technology Facilities Council (STFC) UNSPECIFIED
NASAUNSPECIFIED
Bundesministerium für Verkehr, Innovation und Technologie (BMVIT)UNSPECIFIED
European Space Agency-PROgramme for the Development of scientific EXperiments (ESA-PRODEX) (Belgium)UNSPECIFIED
Deutsches Zentrum für Luft- und Raumfahrt (DLR)UNSPECIFIED
Comisión Interministerial de Ciencia y Tecnología (CICYT)UNSPECIFIED
Ministerio de Ciencia Y Tecnologia (MCYT)UNSPECIFIED
Subject Keywords:galaxies: dwarf; dust, extinction; evolution
Record Number:CaltechAUTHORS:20101124-111335303
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20101124-111335303
Official Citation:Herschel photometric observations of the low metallicity dwarf galaxy NGC 1705 B. O'Halloran, M. Galametz, S. C. Madden, R. Auld, M. Baes, M. J. Barlow, G. J. Bendo, J. J. Bock, A. Boselli, M. Bradford, V. Buat, N. Castro-Rodriguez, P. Chanial, S. Charlot, L. Ciesla, D. L. Clements, D. Cormier, A. Cooray, L. Cortese, J. I. Davies, E. Dwek, S. A. Eales, D. Elbaz, F. Galliano, W. K. Gear, J. Glenn, H. L. Gomez, S. Hony, K. G. Isaak, L. R. Levenson, N. Lu, K. Okumura, S. Oliver, M. J. Page, P. Panuzzo, A. Papageorgiou, T. J. Parkin, I. Perez-Fournon, M. Pohlen, N. Rangwala, E. E. Rigby, H. Roussel, A. Rykala, N. Sacchi, M. Sauvage, B. Schulz, M. R. P. Schirm, M. W. L. Smith, L. Spinoglio, S. Srinivasan, J. A. Stevens, M. Symeonidis, M. Trichas, M. Vaccari, L. Vigroux, C. D. Wilson, H. Wozniak, G. S. Wright and W. W. Zeilinger A&A 518 L58 (2010) DOI: 10.1051/0004-6361/201014580
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21022
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:29 Nov 2010 16:49
Last Modified:07 Oct 2017 02:45

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