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Herschel photometric observations of the low metallicity dwarf galaxy NGC 1705

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Abstract
We present Herschel SPIRE and PACS photometeric observations of the low metallicity (Z similar to 0.35 Z(circle dot)) 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 mu m, 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.
Keywords
extinction, evolution, dust, galaxies: dwarf, STARBURST, NGC-1705, EMISSION, MILKY-WAY, HII-REGIONS, AMORPHOUS-CARBON, INTERSTELLAR DUST, SPINNING DUST GRAINS, SPECTRAL ENERGY-DISTRIBUTION, POLYCYCLIC AROMATIC-HYDROCARBONS

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Chicago
O’Halloran, B, M Galametz, SC Madden, R Auld, Maarten Baes, MJ Barlow, GJ Bendo, et al. 2010. “Herschel Photometric Observations of the Low Metallicity Dwarf Galaxy NGC 1705.” Astronomy & Astrophysics 518.
APA
O’Halloran, B., Galametz, M., Madden, S., Auld, R., Baes, M., Barlow, M., Bendo, G., et al. (2010). Herschel photometric observations of the low metallicity dwarf galaxy NGC 1705. ASTRONOMY & ASTROPHYSICS, 518.
Vancouver
1.
O’Halloran B, Galametz M, Madden S, Auld R, Baes M, Barlow M, et al. Herschel photometric observations of the low metallicity dwarf galaxy NGC 1705. ASTRONOMY & ASTROPHYSICS. 2010;518.
MLA
O’Halloran, B, M Galametz, SC Madden, et al. “Herschel Photometric Observations of the Low Metallicity Dwarf Galaxy NGC 1705.” ASTRONOMY & ASTROPHYSICS 518 (2010): n. pag. Print.
@article{1236872,
  abstract     = {We present Herschel SPIRE and PACS photometeric observations of the low metallicity (Z similar to 0.35 Z(circle dot)) 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 mu m, 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.},
  articleno    = {L58},
  author       = {O'Halloran, B and Galametz, M and Madden, SC and Auld, R and Baes, Maarten and Barlow, MJ and Bendo, GJ and Bock, JJ and Boselli, A and Bradford, M and Buat, V and Castro-Rodriguez, N and Chanial, P and Charlot, S and Ciesla, L and Clements, DL and Cormier, D and Cooray, A and Cortese, L and Davies, JI and Dwek, E and Eales, SA and Elbaz, D and Galliano, F and Gear, WK and Glenn, J and Gomez, HL and Hony, S and Isaak, KG and Levenson, LR and Lu, N and Okumura, K and Oliver, S and Page, MJ and Panuzzo, P and Papageorgiou, A and Parkin, TJ and Perez-Fournon, I and Pohlen, M and Rangwala, N and Rigby, EE and Roussel, H and Rykala, A and Sacchi, N and Sauvage, M and Schulz, B and Schirm, MRP and Smith, MWL and Spinoglio, L and Srinivasan, S and Stevens, JA and Symeonidis, M and Trichas, M and Vaccari, M and Vigroux, L and Wilson, CD and Wozniak, H and Wright, GS and Zeilinger, WW},
  issn         = {0004-6361},
  journal      = {ASTRONOMY \& ASTROPHYSICS},
  keyword      = {extinction,evolution,dust,galaxies: dwarf,STARBURST,NGC-1705,EMISSION,MILKY-WAY,HII-REGIONS,AMORPHOUS-CARBON,INTERSTELLAR DUST,SPINNING DUST GRAINS,SPECTRAL ENERGY-DISTRIBUTION,POLYCYCLIC AROMATIC-HYDROCARBONS},
  language     = {eng},
  pages        = {5},
  title        = {Herschel photometric observations of the low metallicity dwarf galaxy NGC 1705},
  url          = {http://dx.doi.org/10.1051/0004-6361/201014580},
  volume       = {518},
  year         = {2010},
}

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