Dust lanes in backlit galaxies: first results from the STARSMOG survey

William C. Keel, Sarah Bradford, Benne Holwerda, Christopher Conselice, Ivan Baldry, Jonathan Bland-Hawthorn, Simon P. Driver, Loretta Dunne, Jochen Liske, Aaron Robotham, Richard Tuffs

Research output: Chapter in Book/Conference paperConference paper

Abstract

STARSMOG is an HST WFC3 snapshot survey of dust attenuation in overlapping backlit galaxies, planned to span the range of morphological type and luminosity of dust-rich galaxies. The target list came from the Galaxy Zoo and GAMA catalogs, imposing a minimum redshift difference to guarantee large line-of-sight separations, virtually eliminating scattering corrections and avoiding potentially distorted interacting systems. These include the first flocculent spirals studied with the occulting-galaxy approach. We present results from the geometrically most favorable subset of 9 pairs from the 54 observed STARSMOG systems. The data quality and intensity of background light let us map dust features with attenuations of only a few per cent in the red F606W band. Organized dust lanes show sharp outer boundaries in disks, and are absent in galaxies of late Hubble type. Many Sb-Sc disks show a dusty web of criss-crossing lanes, some nearly at right angles to the overall spiral pattern. Particularly favorable cases constraint the scale height of starlight in the foreground disks, through comparison of the light loss in regions with and without background light. The covering fraction of dust at various attenuation levels is consistent between barred and nonbarred spirals, although dust features may be more concentrated in azimuth when a bar is present (and concentrated in an annulus when a stellar resonance ring is seen). Together with our previous data on much more limited samples or at lower resolution,these results add to a picture where galaxies of similar morphology may have quite different attenuation patterns with radius for both arm and interarm dust.

Original languageEnglish
Title of host publicationAmerican Astronomical Society Meeting Abstracts #229
PublisherAmerican Astronomical Society
Publication statusPublished - Jan 2017

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dust
galaxies
attenuation
scale height
annuli
azimuth
lists
line of sight
set theory
catalogs
coverings
luminosity
radii
rings
scattering

Bibliographical note

229

Cite this

Keel, W. C., Bradford, S., Holwerda, B., Conselice, C., Baldry, I., Bland-Hawthorn, J., ... Tuffs, R. (2017). Dust lanes in backlit galaxies: first results from the STARSMOG survey. In American Astronomical Society Meeting Abstracts #229 American Astronomical Society.
Keel, William C. ; Bradford, Sarah ; Holwerda, Benne ; Conselice, Christopher ; Baldry, Ivan ; Bland-Hawthorn, Jonathan ; Driver, Simon P. ; Dunne, Loretta ; Liske, Jochen ; Robotham, Aaron ; Tuffs, Richard. / Dust lanes in backlit galaxies: first results from the STARSMOG survey. American Astronomical Society Meeting Abstracts #229. American Astronomical Society, 2017.
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abstract = "STARSMOG is an HST WFC3 snapshot survey of dust attenuation in overlapping backlit galaxies, planned to span the range of morphological type and luminosity of dust-rich galaxies. The target list came from the Galaxy Zoo and GAMA catalogs, imposing a minimum redshift difference to guarantee large line-of-sight separations, virtually eliminating scattering corrections and avoiding potentially distorted interacting systems. These include the first flocculent spirals studied with the occulting-galaxy approach. We present results from the geometrically most favorable subset of 9 pairs from the 54 observed STARSMOG systems. The data quality and intensity of background light let us map dust features with attenuations of only a few per cent in the red F606W band. Organized dust lanes show sharp outer boundaries in disks, and are absent in galaxies of late Hubble type. Many Sb-Sc disks show a dusty web of criss-crossing lanes, some nearly at right angles to the overall spiral pattern. Particularly favorable cases constraint the scale height of starlight in the foreground disks, through comparison of the light loss in regions with and without background light. The covering fraction of dust at various attenuation levels is consistent between barred and nonbarred spirals, although dust features may be more concentrated in azimuth when a bar is present (and concentrated in an annulus when a stellar resonance ring is seen). Together with our previous data on much more limited samples or at lower resolution,these results add to a picture where galaxies of similar morphology may have quite different attenuation patterns with radius for both arm and interarm dust.",
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Keel, WC, Bradford, S, Holwerda, B, Conselice, C, Baldry, I, Bland-Hawthorn, J, Driver, SP, Dunne, L, Liske, J, Robotham, A & Tuffs, R 2017, Dust lanes in backlit galaxies: first results from the STARSMOG survey. in American Astronomical Society Meeting Abstracts #229. American Astronomical Society.

Dust lanes in backlit galaxies: first results from the STARSMOG survey. / Keel, William C.; Bradford, Sarah; Holwerda, Benne; Conselice, Christopher; Baldry, Ivan; Bland-Hawthorn, Jonathan; Driver, Simon P.; Dunne, Loretta; Liske, Jochen; Robotham, Aaron; Tuffs, Richard.

American Astronomical Society Meeting Abstracts #229. American Astronomical Society, 2017.

Research output: Chapter in Book/Conference paperConference paper

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AU - Bradford, Sarah

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AU - Baldry, Ivan

AU - Bland-Hawthorn, Jonathan

AU - Driver, Simon P.

AU - Dunne, Loretta

AU - Liske, Jochen

AU - Robotham, Aaron

AU - Tuffs, Richard

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N2 - STARSMOG is an HST WFC3 snapshot survey of dust attenuation in overlapping backlit galaxies, planned to span the range of morphological type and luminosity of dust-rich galaxies. The target list came from the Galaxy Zoo and GAMA catalogs, imposing a minimum redshift difference to guarantee large line-of-sight separations, virtually eliminating scattering corrections and avoiding potentially distorted interacting systems. These include the first flocculent spirals studied with the occulting-galaxy approach. We present results from the geometrically most favorable subset of 9 pairs from the 54 observed STARSMOG systems. The data quality and intensity of background light let us map dust features with attenuations of only a few per cent in the red F606W band. Organized dust lanes show sharp outer boundaries in disks, and are absent in galaxies of late Hubble type. Many Sb-Sc disks show a dusty web of criss-crossing lanes, some nearly at right angles to the overall spiral pattern. Particularly favorable cases constraint the scale height of starlight in the foreground disks, through comparison of the light loss in regions with and without background light. The covering fraction of dust at various attenuation levels is consistent between barred and nonbarred spirals, although dust features may be more concentrated in azimuth when a bar is present (and concentrated in an annulus when a stellar resonance ring is seen). Together with our previous data on much more limited samples or at lower resolution,these results add to a picture where galaxies of similar morphology may have quite different attenuation patterns with radius for both arm and interarm dust.

AB - STARSMOG is an HST WFC3 snapshot survey of dust attenuation in overlapping backlit galaxies, planned to span the range of morphological type and luminosity of dust-rich galaxies. The target list came from the Galaxy Zoo and GAMA catalogs, imposing a minimum redshift difference to guarantee large line-of-sight separations, virtually eliminating scattering corrections and avoiding potentially distorted interacting systems. These include the first flocculent spirals studied with the occulting-galaxy approach. We present results from the geometrically most favorable subset of 9 pairs from the 54 observed STARSMOG systems. The data quality and intensity of background light let us map dust features with attenuations of only a few per cent in the red F606W band. Organized dust lanes show sharp outer boundaries in disks, and are absent in galaxies of late Hubble type. Many Sb-Sc disks show a dusty web of criss-crossing lanes, some nearly at right angles to the overall spiral pattern. Particularly favorable cases constraint the scale height of starlight in the foreground disks, through comparison of the light loss in regions with and without background light. The covering fraction of dust at various attenuation levels is consistent between barred and nonbarred spirals, although dust features may be more concentrated in azimuth when a bar is present (and concentrated in an annulus when a stellar resonance ring is seen). Together with our previous data on much more limited samples or at lower resolution,these results add to a picture where galaxies of similar morphology may have quite different attenuation patterns with radius for both arm and interarm dust.

M3 - Conference paper

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ER -

Keel WC, Bradford S, Holwerda B, Conselice C, Baldry I, Bland-Hawthorn J et al. Dust lanes in backlit galaxies: first results from the STARSMOG survey. In American Astronomical Society Meeting Abstracts #229. American Astronomical Society. 2017