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Galaxy Zoo: dust in spiral galaxies

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Galaxy Zoo : dust in spiral galaxies. / Masters, Karen L.; Nichol, Robert; Bamford, Steven P.; Mosleh, Moein; Lintott, Chris J.; Andreescu, Dan; Edmondson, Edward M.; Keel, William C.; Murray, Phil; Raddick, M. Jordan; Schawinski, Kevin; Slosar, Anze; Szalay, Alexander S.; Thomas, Daniel Georg; Vandenberg, Jan.

In: Monthly Notices of the Royal Astronomical Society, Vol. 404, No. 2, 2011, p. 792-810.

Research output: Contribution to journalArticle

Harvard

Masters, KL, Nichol, R, Bamford, SP, Mosleh, M, Lintott, CJ, Andreescu, D, Edmondson, EM, Keel, WC, Murray, P, Raddick, MJ, Schawinski, K, Slosar, A, Szalay, AS, Thomas, DG & Vandenberg, J 2011, 'Galaxy Zoo: dust in spiral galaxies', Monthly Notices of the Royal Astronomical Society, vol. 404, no. 2, pp. 792-810. https://doi.org/10.1111/j.1365-2966.2010.16335.x

APA

Masters, K. L., Nichol, R., Bamford, S. P., Mosleh, M., Lintott, C. J., Andreescu, D., Edmondson, E. M., Keel, W. C., Murray, P., Raddick, M. J., Schawinski, K., Slosar, A., Szalay, A. S., Thomas, D. G., & Vandenberg, J. (2011). Galaxy Zoo: dust in spiral galaxies. Monthly Notices of the Royal Astronomical Society, 404(2), 792-810. https://doi.org/10.1111/j.1365-2966.2010.16335.x

Vancouver

Masters KL, Nichol R, Bamford SP, Mosleh M, Lintott CJ, Andreescu D et al. Galaxy Zoo: dust in spiral galaxies. Monthly Notices of the Royal Astronomical Society. 2011;404(2):792-810. https://doi.org/10.1111/j.1365-2966.2010.16335.x

Author

Masters, Karen L. ; Nichol, Robert ; Bamford, Steven P. ; Mosleh, Moein ; Lintott, Chris J. ; Andreescu, Dan ; Edmondson, Edward M. ; Keel, William C. ; Murray, Phil ; Raddick, M. Jordan ; Schawinski, Kevin ; Slosar, Anze ; Szalay, Alexander S. ; Thomas, Daniel Georg ; Vandenberg, Jan. / Galaxy Zoo : dust in spiral galaxies. In: Monthly Notices of the Royal Astronomical Society. 2011 ; Vol. 404, No. 2. pp. 792-810.

Bibtex

@article{e6c55f11f8004885a3faf2308d68a0b9,
title = "Galaxy Zoo: dust in spiral galaxies",
abstract = "We investigate the effect of dust on spiral galaxies by measuring the inclination dependence of optical colours for 24 276 well-resolved Sloan Digital Sky Survey (SDSS) galaxies visually classified via the Galaxy Zoo project. We find clear trends of reddening with inclination which imply a total extinction from face-on to edge-on of 0.7, 0.6, 0.5 and 0.4 mag for the ugri passbands (estimating 0.3 mag of extinction in z band). We split the sample into {\textquoteleft}bulgy{\textquoteright} (early-type) and {\textquoteleft}discy{\textquoteright} (late-type) spirals using the SDSS fracdeV (or fDeV) parameter and show that the average face-on colour of {\textquoteleft}bulgy{\textquoteright} spirals is redder than the average edge-on colour of {\textquoteleft}discy{\textquoteright} spirals. This shows that the observed optical colour of a spiral galaxy is determined almost equally by the spiral type (via the bulge–disc ratio and stellar populations), and reddening due to dust. We find that both luminosity and spiral type affect the total amount of extinction, with discy spirals at Mr∼−21.5 mag having the most reddening – more than twice as much as both the lowest luminosity and most massive, bulge-dominated spirals. An increase in dust content is well known for more luminous galaxies, but the decrease of the trend for the most luminous has not been observed before and may be related to their lower levels of recent star formation. We compare our results with the latest dust attenuation models of Tuffs et al. We find that the model reproduces the observed trends reasonably well but overpredicts the amount of u-band attenuation in edge-on galaxies. This could be an inadequacy in the Milky Way extinction law (when applied to external galaxies), but more likely indicates the need for a wider range of dust–star geometries. We end by discussing the effects of dust on large galaxy surveys and emphasize that these effects will become important as we push to higher precision measurements of galaxy properties and their clustering. ",
author = "Masters, {Karen L.} and Robert Nichol and Bamford, {Steven P.} and Moein Mosleh and Lintott, {Chris J.} and Dan Andreescu and Edmondson, {Edward M.} and Keel, {William C.} and Phil Murray and Raddick, {M. Jordan} and Kevin Schawinski and Anze Slosar and Szalay, {Alexander S.} and Thomas, {Daniel Georg} and Jan Vandenberg",
note = "{\textcopyright} 2010 The Authors. Journal compilation {\textcopyright} 2010 RAS",
year = "2011",
doi = "10.1111/j.1365-2966.2010.16335.x",
language = "English",
volume = "404",
pages = "792--810",
journal = "MNRAS",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "2",

}

RIS

TY - JOUR

T1 - Galaxy Zoo

T2 - dust in spiral galaxies

AU - Masters, Karen L.

AU - Nichol, Robert

AU - Bamford, Steven P.

AU - Mosleh, Moein

AU - Lintott, Chris J.

AU - Andreescu, Dan

AU - Edmondson, Edward M.

AU - Keel, William C.

AU - Murray, Phil

AU - Raddick, M. Jordan

AU - Schawinski, Kevin

AU - Slosar, Anze

AU - Szalay, Alexander S.

AU - Thomas, Daniel Georg

AU - Vandenberg, Jan

N1 - © 2010 The Authors. Journal compilation © 2010 RAS

PY - 2011

Y1 - 2011

N2 - We investigate the effect of dust on spiral galaxies by measuring the inclination dependence of optical colours for 24 276 well-resolved Sloan Digital Sky Survey (SDSS) galaxies visually classified via the Galaxy Zoo project. We find clear trends of reddening with inclination which imply a total extinction from face-on to edge-on of 0.7, 0.6, 0.5 and 0.4 mag for the ugri passbands (estimating 0.3 mag of extinction in z band). We split the sample into ‘bulgy’ (early-type) and ‘discy’ (late-type) spirals using the SDSS fracdeV (or fDeV) parameter and show that the average face-on colour of ‘bulgy’ spirals is redder than the average edge-on colour of ‘discy’ spirals. This shows that the observed optical colour of a spiral galaxy is determined almost equally by the spiral type (via the bulge–disc ratio and stellar populations), and reddening due to dust. We find that both luminosity and spiral type affect the total amount of extinction, with discy spirals at Mr∼−21.5 mag having the most reddening – more than twice as much as both the lowest luminosity and most massive, bulge-dominated spirals. An increase in dust content is well known for more luminous galaxies, but the decrease of the trend for the most luminous has not been observed before and may be related to their lower levels of recent star formation. We compare our results with the latest dust attenuation models of Tuffs et al. We find that the model reproduces the observed trends reasonably well but overpredicts the amount of u-band attenuation in edge-on galaxies. This could be an inadequacy in the Milky Way extinction law (when applied to external galaxies), but more likely indicates the need for a wider range of dust–star geometries. We end by discussing the effects of dust on large galaxy surveys and emphasize that these effects will become important as we push to higher precision measurements of galaxy properties and their clustering.

AB - We investigate the effect of dust on spiral galaxies by measuring the inclination dependence of optical colours for 24 276 well-resolved Sloan Digital Sky Survey (SDSS) galaxies visually classified via the Galaxy Zoo project. We find clear trends of reddening with inclination which imply a total extinction from face-on to edge-on of 0.7, 0.6, 0.5 and 0.4 mag for the ugri passbands (estimating 0.3 mag of extinction in z band). We split the sample into ‘bulgy’ (early-type) and ‘discy’ (late-type) spirals using the SDSS fracdeV (or fDeV) parameter and show that the average face-on colour of ‘bulgy’ spirals is redder than the average edge-on colour of ‘discy’ spirals. This shows that the observed optical colour of a spiral galaxy is determined almost equally by the spiral type (via the bulge–disc ratio and stellar populations), and reddening due to dust. We find that both luminosity and spiral type affect the total amount of extinction, with discy spirals at Mr∼−21.5 mag having the most reddening – more than twice as much as both the lowest luminosity and most massive, bulge-dominated spirals. An increase in dust content is well known for more luminous galaxies, but the decrease of the trend for the most luminous has not been observed before and may be related to their lower levels of recent star formation. We compare our results with the latest dust attenuation models of Tuffs et al. We find that the model reproduces the observed trends reasonably well but overpredicts the amount of u-band attenuation in edge-on galaxies. This could be an inadequacy in the Milky Way extinction law (when applied to external galaxies), but more likely indicates the need for a wider range of dust–star geometries. We end by discussing the effects of dust on large galaxy surveys and emphasize that these effects will become important as we push to higher precision measurements of galaxy properties and their clustering.

U2 - 10.1111/j.1365-2966.2010.16335.x

DO - 10.1111/j.1365-2966.2010.16335.x

M3 - Article

VL - 404

SP - 792

EP - 810

JO - MNRAS

JF - MNRAS

SN - 0035-8711

IS - 2

ER -

ID: 1517311