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Far-infrared line imaging of the starburst ring in NGC 1097 with the Herschel/PACS spectrometer

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Abstract
NGC 1097 is a nearby SBb galaxy with a Seyfert nucleus and a bright starburst ring. We study the physical properties of the interstellar medium (ISM) in the ring using spatially resolved far-infrared spectral maps of the circumnuclear starburst ring of NGC 1097, obtained with the PACS spectrometer on board the Herschel Space Observatory. In particular, we map the important ISM cooling and diagnostic emission lines of [OI] 63 mu m, [OIII] 88 mu m, [NII] 122 mu m, [CII] 158 mu m and [NII] 205 mu m. We observe that in the [OI] 63 mu m, [OIII] 88 mu m, and [NII] 122 mu m line maps, the emission is enhanced in clumps along the NE part of the ring. We observe evidence of rapid rotation in the circumnuclear ring, with a rotation velocity of similar to 220 km s(-1) (inclination uncorrected) measured in all lines. The [OI] 63 mu m/[CII] 158 mu m ratio varies smoothly throughout the central region, and is enhanced on the northeastern part of the ring, which may indicate a stronger radiation field. This enhancement coincides with peaks in the [OI] 63 mu m and [OIII] 88 mu m maps. Variations of the [NII] 122 mu m/[NII] 205 mu m ratio correspond to a range in the ionized gas density between 150 and 400 cm(-3).
Keywords
CIRCUMNUCLEAR STAR-FORMATION, SPIRAL GALAXY NGC-1097, ACTIVE GALAXIES, SPECTROSCOPY, NUCLEAR, GAS, DIAGNOSTICS, EMISSION, REGIONS, photon-dominated region, infrared: galaxies, galaxies: Seyfert, galaxies: starburst, techniques: imaging spectroscopy, galaxies: individual: NGC 1097

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MLA
Beirao, P., et al. “Far-Infrared Line Imaging of the Starburst Ring in NGC 1097 with the Herschel/PACS Spectrometer.” ASTRONOMY & ASTROPHYSICS, vol. 518, 2010.
APA
Beirao, P., Armus, L., Appleton, P., Smith, J.-D., Croxall, K., Murphy, E., … Zibetti, S. (2010). Far-infrared line imaging of the starburst ring in NGC 1097 with the Herschel/PACS spectrometer. ASTRONOMY & ASTROPHYSICS, 518.
Chicago author-date
Beirao, P, L Armus, PN Appleton, J-DT Smith, KV Croxall, EJ Murphy, DA Dale, et al. 2010. “Far-Infrared Line Imaging of the Starburst Ring in NGC 1097 with the Herschel/PACS Spectrometer.” ASTRONOMY & ASTROPHYSICS 518.
Chicago author-date (all authors)
Beirao, P, L Armus, PN Appleton, J-DT Smith, KV Croxall, EJ Murphy, DA Dale, G Helou, RC Kennicutt, D Calzetti, AD Bolatto, BR Brandl, AF Crocker, BT Draine, G Dumas, CW Engelbracht, A Gil de Paz, KD Gordon, B Groves, C-N Hao, JL Hinz, LK Hunt, BD Johnson, J Koda, O Krause, AK Leroy, Sharon Meidt van der Wel, J Richer, H-W Rix, N Rahman, H Roussel, KM Sandstrom, M Sauvage, E Schinnerer, RA Skibba, S Srinivasan, F Walter, BE Warren, CD Wilson, MG Wolfire, and S Zibetti. 2010. “Far-Infrared Line Imaging of the Starburst Ring in NGC 1097 with the Herschel/PACS Spectrometer.” ASTRONOMY & ASTROPHYSICS 518.
Vancouver
1.
Beirao P, Armus L, Appleton P, Smith J-D, Croxall K, Murphy E, et al. Far-infrared line imaging of the starburst ring in NGC 1097 with the Herschel/PACS spectrometer. ASTRONOMY & ASTROPHYSICS. 2010;518.
IEEE
[1]
P. Beirao et al., “Far-infrared line imaging of the starburst ring in NGC 1097 with the Herschel/PACS spectrometer,” ASTRONOMY & ASTROPHYSICS, vol. 518, 2010.
@article{8622904,
  abstract     = {NGC 1097 is a nearby SBb galaxy with a Seyfert nucleus and a bright starburst ring. We study the physical properties of the interstellar medium (ISM) in the ring using spatially resolved far-infrared spectral maps of the circumnuclear starburst ring of NGC 1097, obtained with the PACS spectrometer on board the Herschel Space Observatory. In particular, we map the important ISM cooling and diagnostic emission lines of [OI] 63 mu m, [OIII] 88 mu m, [NII] 122 mu m, [CII] 158 mu m and [NII] 205 mu m. We observe that in the [OI] 63 mu m, [OIII] 88 mu m, and [NII] 122 mu m line maps, the emission is enhanced in clumps along the NE part of the ring. We observe evidence of rapid rotation in the circumnuclear ring, with a rotation velocity of similar to 220 km s(-1) (inclination uncorrected) measured in all lines. The [OI] 63 mu m/[CII] 158 mu m ratio varies smoothly throughout the central region, and is enhanced on the northeastern part of the ring, which may indicate a stronger radiation field. This enhancement coincides with peaks in the [OI] 63 mu m and [OIII] 88 mu m maps. Variations of the [NII] 122 mu m/[NII] 205 mu m ratio correspond to a range in the ionized gas density between 150 and 400 cm(-3).},
  articleno    = {L60},
  author       = {Beirao, P and Armus, L and Appleton, PN and Smith, J-DT and Croxall, KV and Murphy, EJ and Dale, DA and Helou, G and Kennicutt, RC and Calzetti, D and Bolatto, AD and Brandl, BR and Crocker, AF and Draine, BT and Dumas, G and Engelbracht, CW and Gil de Paz, A and Gordon, KD and Groves, B and Hao, C-N and Hinz, JL and Hunt, LK and Johnson, BD and Koda, J and Krause, O and Leroy, AK and van der Wel, Sharon Meidt and Richer, J and Rix, H-W and Rahman, N and Roussel, H and Sandstrom, KM and Sauvage, M and Schinnerer, E and Skibba, RA and Srinivasan, S and Walter, F and Warren, BE and Wilson, CD and Wolfire, MG and Zibetti, S},
  issn         = {0004-6361},
  journal      = {ASTRONOMY & ASTROPHYSICS},
  keywords     = {CIRCUMNUCLEAR STAR-FORMATION,SPIRAL GALAXY NGC-1097,ACTIVE GALAXIES,SPECTROSCOPY,NUCLEAR,GAS,DIAGNOSTICS,EMISSION,REGIONS,photon-dominated region,infrared: galaxies,galaxies: Seyfert,galaxies: starburst,techniques: imaging spectroscopy,galaxies: individual: NGC 1097},
  language     = {eng},
  pages        = {5},
  title        = {Far-infrared line imaging of the starburst ring in NGC 1097 with the Herschel/PACS spectrometer},
  url          = {http://dx.doi.org/10.1051/0004-6361/201014592},
  volume       = {518},
  year         = {2010},
}

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