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New HErschel Multi-wavelength Extragalactic Survey of Edge-on Spirals (NHEMESES)

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Abstract
Edge-on spiral galaxies offer a unique perspective on the vertical structure of spiral disks, both stars and the iconic dark dustlanes. The thickness of these dustlanes can now be resolved for the first time with Herschel in far-infrared and sub-mm emission. We present NHEMESES, an ongoing project that targets 12 edge-on spiral galaxies with the PACS and SPIRE instruments on Herschel. These vertically resolved observations of edge-on spirals will impact on several current topics. First and foremost, these Herschel observations will settle whether or not there is a phase change in the vertical structure of the ISM with disk mass. Previously, a dramatic change in dustlane morphology was observed as in massive disks the dust collapses into a thin lane. If this is the case, the vertical balance between turbulence and gravity dictates the ISM structure and consequently star-formation and related phenomena (spiral arms, bars etc.). We specifically target lower mass nearby edge-ons to complement existing Herschel observations of high-mass edge-on spirals (the HEROES project). Secondly, the combined data-set, together with existing Spitzer observations, will drive a new generation of spiral disk Spectral Energy Distribution models. These model how dust reprocesses starlight to thermal emission but the dust geometry remains the critical unknown. And thirdly, the observations will provide an accurate and unbiased census of the cold dusty structures occasionally seen extending out of the plane of the disk, when backlit by the stellar disk. To illustrate the NHEMESES project, we present early results on NGC 4244 and NGC 891, two well studies examples of a low and high-mass edge-on spiral.
Keywords
GALACTIC DISK, dust mass) galaxies: individual (NGC 4244, NGC 891) galaxies: ISM galaxies: spiral galaxies: structure infrared: ISM submillimeter, extinction ISM: structure galaxies: fundamental parameters (typical scales, (ISM:) dust, DUST, GALAXIES, EMISSION, NGC-891, THICK

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MLA
Holwerda, BW, et al. “New HErschel Multi-Wavelength Extragalactic Survey of Edge-on Spirals (NHEMESES).” IAU Symposium Proceedings Series, edited by RJ Tuffs and CC Popescu, vol. 284, Cambridge University Press, 2012, pp. 128–31, doi:10.1017/S1743921312008897.
APA
Holwerda, B., Bianchi, S., Baes, M., de Jong, R., Dalcanton, J., Radburn-Smith, D., … Xilouris, M. (2012). New HErschel Multi-wavelength Extragalactic Survey of Edge-on Spirals (NHEMESES). In R. Tuffs & C. Popescu (Eds.), IAU Symposium Proceedings Series (Vol. 284, pp. 128–131). https://doi.org/10.1017/S1743921312008897
Chicago author-date
Holwerda, BW, S Bianchi, Maarten Baes, RS de Jong, JJ Dalcanton, D Radburn-Smith, Karl Gordon, and M Xilouris. 2012. “New HErschel Multi-Wavelength Extragalactic Survey of Edge-on Spirals (NHEMESES).” In IAU Symposium Proceedings Series, edited by RJ Tuffs and CC Popescu, 284:128–31. Cambridge, UK: Cambridge University Press. https://doi.org/10.1017/S1743921312008897.
Chicago author-date (all authors)
Holwerda, BW, S Bianchi, Maarten Baes, RS de Jong, JJ Dalcanton, D Radburn-Smith, Karl Gordon, and M Xilouris. 2012. “New HErschel Multi-Wavelength Extragalactic Survey of Edge-on Spirals (NHEMESES).” In IAU Symposium Proceedings Series, ed by. RJ Tuffs and CC Popescu, 284:128–131. Cambridge, UK: Cambridge University Press. doi:10.1017/S1743921312008897.
Vancouver
1.
Holwerda B, Bianchi S, Baes M, de Jong R, Dalcanton J, Radburn-Smith D, et al. New HErschel Multi-wavelength Extragalactic Survey of Edge-on Spirals (NHEMESES). In: Tuffs R, Popescu C, editors. IAU Symposium Proceedings Series. Cambridge, UK: Cambridge University Press; 2012. p. 128–31.
IEEE
[1]
B. Holwerda et al., “New HErschel Multi-wavelength Extragalactic Survey of Edge-on Spirals (NHEMESES),” in IAU Symposium Proceedings Series, Preston, UK, 2012, vol. 284, pp. 128–131.
@inproceedings{3097865,
  abstract     = {{Edge-on spiral galaxies offer a unique perspective on the vertical structure of spiral disks, both stars and the iconic dark dustlanes. The thickness of these dustlanes can now be resolved for the first time with Herschel in far-infrared and sub-mm emission. We present NHEMESES, an ongoing project that targets 12 edge-on spiral galaxies with the PACS and SPIRE instruments on Herschel. These vertically resolved observations of edge-on spirals will impact on several current topics.
First and foremost, these Herschel observations will settle whether or not there is a phase change in the vertical structure of the ISM with disk mass. Previously, a dramatic change in dustlane morphology was observed as in massive disks the dust collapses into a thin lane. If this is the case, the vertical balance between turbulence and gravity dictates the ISM structure and consequently star-formation and related phenomena (spiral arms, bars etc.). We specifically target lower mass nearby edge-ons to complement existing Herschel observations of high-mass edge-on spirals (the HEROES project).
Secondly, the combined data-set, together with existing Spitzer observations, will drive a new generation of spiral disk Spectral Energy Distribution models. These model how dust reprocesses starlight to thermal emission but the dust geometry remains the critical unknown.
And thirdly, the observations will provide an accurate and unbiased census of the cold dusty structures occasionally seen extending out of the plane of the disk, when backlit by the stellar disk. To illustrate the NHEMESES project, we present early results on NGC 4244 and NGC 891, two well studies examples of a low and high-mass edge-on spiral.}},
  author       = {{Holwerda, BW and Bianchi, S and Baes, Maarten and de Jong, RS and Dalcanton, JJ and Radburn-Smith, D and Gordon, Karl and Xilouris, M}},
  booktitle    = {{IAU Symposium Proceedings Series}},
  editor       = {{Tuffs, RJ and Popescu, CC}},
  isbn         = {{9781107019843}},
  issn         = {{1743-9213}},
  keywords     = {{GALACTIC DISK,dust mass) galaxies: individual (NGC 4244,NGC 891) galaxies: ISM galaxies: spiral galaxies: structure infrared: ISM submillimeter,extinction ISM: structure galaxies: fundamental parameters (typical scales,(ISM:) dust,DUST,GALAXIES,EMISSION,NGC-891,THICK}},
  language     = {{eng}},
  location     = {{Preston, UK}},
  pages        = {{128--131}},
  publisher    = {{Cambridge University Press}},
  title        = {{New HErschel Multi-wavelength Extragalactic Survey of Edge-on Spirals (NHEMESES)}},
  url          = {{http://doi.org/10.1017/S1743921312008897}},
  volume       = {{284}},
  year         = {{2012}},
}

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