The cold dust content of the nearby galaxies IC5325, NGC7496, NGC7590, and NGC7599
ABSTRACT Star-forming galaxies are rich reservoirs of dust, both warm and cold. But the cold dust emission is faint alongside the relatively bright and ubiquitous warm dust emission. Recently, evidence for a very cold dust (VCD) component has also been revealed via millimetre/submillimetre (mm/sub-m...
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ftcdlib:oai:escholarship.org/ark:/13030/qt13m8v6hm 2023-05-15T18:23:10+02:00 The cold dust content of the nearby galaxies IC5325, NGC7496, NGC7590, and NGC7599 Singh, Swapnil Ashby, MLN Vig, Sarita Ghosh, SK Jarrett, T Crawford, TM Malkan, Matthew A Archipley, M Vieira, JD 4143 - 4159 2021-07-01 application/pdf https://escholarship.org/uc/item/13m8v6hm unknown eScholarship, University of California qt13m8v6hm https://escholarship.org/uc/item/13m8v6hm public MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol 504, iss 3 dust extinction galaxies: fundamental parameters infrared: galaxies radio continuum: galaxies submillimetre: galaxies astro-ph.GA Astronomical and Space Sciences Astronomy & Astrophysics article 2021 ftcdlib 2021-06-20T14:23:28Z ABSTRACT Star-forming galaxies are rich reservoirs of dust, both warm and cold. But the cold dust emission is faint alongside the relatively bright and ubiquitous warm dust emission. Recently, evidence for a very cold dust (VCD) component has also been revealed via millimetre/submillimetre (mm/sub-mm) photometry of some galaxies. This component, despite being the most massive of the three dust components in star-forming galaxies, is by virtue of its very low temperature, faint and hard to detect together with the relatively bright emission from warmer dust. Here, we analyse the dust content of a carefully selected sample of four galaxies detected by IRAS, WISE, and South Pole Telescope (SPT), whose spectral energy distributions (SEDs) were modelled to constrain their potential cold dust content. Low-frequency radio observations using the Giant Metrewave Radio Telescope (GMRT) were carried out to segregate cold dust emission from non-thermal emission in mm/sub-mm wavebands. We also carried out AstroSat/Ultraviolet Imaging Telescope (UVIT) observations for some galaxies to constrain their SED at shorter wavelengths so as to enforce energy balance for the SED modelling. We constructed their SEDs across a vast wavelength range (extending from UV to radio frequencies) by assembling global photometry from GALEX FUV + NUV, UVIT, Johnson BRI, 2MASS, WISE, IRAC, IRAS, AKARI, ISO PHOT, Planck HFI, SPT, and GMRT. The SEDs were modelled with cigale to estimate their basic properties, in particular to constrain the masses of their total and VCD components. Although the galaxies’ dust masses are dominated by warmer dust, there are hints of VCD in two of the targets, NGC 7496 and NGC 7590. Article in Journal/Newspaper South pole University of California: eScholarship South Pole |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
dust extinction galaxies: fundamental parameters infrared: galaxies radio continuum: galaxies submillimetre: galaxies astro-ph.GA Astronomical and Space Sciences Astronomy & Astrophysics |
spellingShingle |
dust extinction galaxies: fundamental parameters infrared: galaxies radio continuum: galaxies submillimetre: galaxies astro-ph.GA Astronomical and Space Sciences Astronomy & Astrophysics Singh, Swapnil Ashby, MLN Vig, Sarita Ghosh, SK Jarrett, T Crawford, TM Malkan, Matthew A Archipley, M Vieira, JD The cold dust content of the nearby galaxies IC5325, NGC7496, NGC7590, and NGC7599 |
topic_facet |
dust extinction galaxies: fundamental parameters infrared: galaxies radio continuum: galaxies submillimetre: galaxies astro-ph.GA Astronomical and Space Sciences Astronomy & Astrophysics |
description |
ABSTRACT Star-forming galaxies are rich reservoirs of dust, both warm and cold. But the cold dust emission is faint alongside the relatively bright and ubiquitous warm dust emission. Recently, evidence for a very cold dust (VCD) component has also been revealed via millimetre/submillimetre (mm/sub-mm) photometry of some galaxies. This component, despite being the most massive of the three dust components in star-forming galaxies, is by virtue of its very low temperature, faint and hard to detect together with the relatively bright emission from warmer dust. Here, we analyse the dust content of a carefully selected sample of four galaxies detected by IRAS, WISE, and South Pole Telescope (SPT), whose spectral energy distributions (SEDs) were modelled to constrain their potential cold dust content. Low-frequency radio observations using the Giant Metrewave Radio Telescope (GMRT) were carried out to segregate cold dust emission from non-thermal emission in mm/sub-mm wavebands. We also carried out AstroSat/Ultraviolet Imaging Telescope (UVIT) observations for some galaxies to constrain their SED at shorter wavelengths so as to enforce energy balance for the SED modelling. We constructed their SEDs across a vast wavelength range (extending from UV to radio frequencies) by assembling global photometry from GALEX FUV + NUV, UVIT, Johnson BRI, 2MASS, WISE, IRAC, IRAS, AKARI, ISO PHOT, Planck HFI, SPT, and GMRT. The SEDs were modelled with cigale to estimate their basic properties, in particular to constrain the masses of their total and VCD components. Although the galaxies’ dust masses are dominated by warmer dust, there are hints of VCD in two of the targets, NGC 7496 and NGC 7590. |
format |
Article in Journal/Newspaper |
author |
Singh, Swapnil Ashby, MLN Vig, Sarita Ghosh, SK Jarrett, T Crawford, TM Malkan, Matthew A Archipley, M Vieira, JD |
author_facet |
Singh, Swapnil Ashby, MLN Vig, Sarita Ghosh, SK Jarrett, T Crawford, TM Malkan, Matthew A Archipley, M Vieira, JD |
author_sort |
Singh, Swapnil |
title |
The cold dust content of the nearby galaxies IC5325, NGC7496, NGC7590, and NGC7599 |
title_short |
The cold dust content of the nearby galaxies IC5325, NGC7496, NGC7590, and NGC7599 |
title_full |
The cold dust content of the nearby galaxies IC5325, NGC7496, NGC7590, and NGC7599 |
title_fullStr |
The cold dust content of the nearby galaxies IC5325, NGC7496, NGC7590, and NGC7599 |
title_full_unstemmed |
The cold dust content of the nearby galaxies IC5325, NGC7496, NGC7590, and NGC7599 |
title_sort |
cold dust content of the nearby galaxies ic5325, ngc7496, ngc7590, and ngc7599 |
publisher |
eScholarship, University of California |
publishDate |
2021 |
url |
https://escholarship.org/uc/item/13m8v6hm |
op_coverage |
4143 - 4159 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol 504, iss 3 |
op_relation |
qt13m8v6hm https://escholarship.org/uc/item/13m8v6hm |
op_rights |
public |
_version_ |
1766202651036352512 |