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Galaxy Zoo: the fraction of merging galaxies in the SDSS and their morphologies

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Galaxy Zoo : the fraction of merging galaxies in the SDSS and their morphologies. / Darg, Daniel W.; Kaviraj, Sugata; Lintott, Chris J.; Schawinski, Kevin; Sarzi, Marc; Bamford, Steven P.; Silk, Joseph; Proctor, Richard; Andreescu, Dan; Murray, Phil; Nichol, Robert C.; Raddick, M. Jordan; Slosar, Anze; Szalay, Alexander S.; Thomas, Daniel; Vandenberg, Jan.

In: Monthly Notices of the Royal Astronomical Society, Vol. 401, No. 2, 2010, p. 1043-1056.

Research output: Contribution to journalArticle

Harvard

Darg, DW, Kaviraj, S, Lintott, CJ, Schawinski, K, Sarzi, M, Bamford, SP, Silk, J, Proctor, R, Andreescu, D, Murray, P, Nichol, RC, Raddick, MJ, Slosar, A, Szalay, AS, Thomas, D & Vandenberg, J 2010, 'Galaxy Zoo: the fraction of merging galaxies in the SDSS and their morphologies', Monthly Notices of the Royal Astronomical Society, vol. 401, no. 2, pp. 1043-1056. https://doi.org/10.1111/j.1365-2966.2009.15686.x

APA

Darg, D. W., Kaviraj, S., Lintott, C. J., Schawinski, K., Sarzi, M., Bamford, S. P., ... Vandenberg, J. (2010). Galaxy Zoo: the fraction of merging galaxies in the SDSS and their morphologies. Monthly Notices of the Royal Astronomical Society, 401(2), 1043-1056. https://doi.org/10.1111/j.1365-2966.2009.15686.x

Vancouver

Darg DW, Kaviraj S, Lintott CJ, Schawinski K, Sarzi M, Bamford SP et al. Galaxy Zoo: the fraction of merging galaxies in the SDSS and their morphologies. Monthly Notices of the Royal Astronomical Society. 2010;401(2):1043-1056. https://doi.org/10.1111/j.1365-2966.2009.15686.x

Author

Darg, Daniel W. ; Kaviraj, Sugata ; Lintott, Chris J. ; Schawinski, Kevin ; Sarzi, Marc ; Bamford, Steven P. ; Silk, Joseph ; Proctor, Richard ; Andreescu, Dan ; Murray, Phil ; Nichol, Robert C. ; Raddick, M. Jordan ; Slosar, Anze ; Szalay, Alexander S. ; Thomas, Daniel ; Vandenberg, Jan. / Galaxy Zoo : the fraction of merging galaxies in the SDSS and their morphologies. In: Monthly Notices of the Royal Astronomical Society. 2010 ; Vol. 401, No. 2. pp. 1043-1056.

Bibtex

@article{032474bc5431458c838a69714e98d627,
title = "Galaxy Zoo: the fraction of merging galaxies in the SDSS and their morphologies",
abstract = "We present the largest, most homogeneous catalogue of merging galaxies in the nearby Universe obtained through the Galaxy Zoo project – an interface on the World Wide Web enabling large-scale morphological classification of galaxies through visual inspection of images from the Sloan Digital Sky Survey (SDSS). The method converts a set of visually inspected classifications for each galaxy into a single parameter (the ‘weighted-merger-vote fraction,’fm) which describes our confidence that the system is part of an ongoing merger. We describe how fm is used to create a catalogue of 3003 visually selected pairs of merging galaxies from the SDSS in the redshift range 0.005 < z < 0.1. We use our merger sample and values of fm applied to the SDSS Main Galaxy Spectral sample to estimate that the fraction of volume-limited (Mr < −20.55) major mergers (1/3 < M*1/M*2 < 3) in the nearby Universe is 1–3 ×C per cent, where C∼ 1.5 is a correction factor for spectroscopic incompleteness. Having visually classified the morphologies of the constituent galaxies in our mergers, we find that the spiral-to-elliptical ratio of galaxies in mergers is higher by a factor of ∼2 relative to the global population. In a companion paper, we examine the internal properties of these merging galaxies and conclude that this high spiral-to-elliptical ratio in mergers is due to a longer time-scale over which mergers with spirals are detectable compared to mergers with ellipticals.",
author = "Darg, {Daniel W.} and Sugata Kaviraj and Lintott, {Chris J.} and Kevin Schawinski and Marc Sarzi and Bamford, {Steven P.} and Joseph Silk and Richard Proctor and Dan Andreescu and Phil Murray and Nichol, {Robert C.} and Raddick, {M. Jordan} and Anze Slosar and Szalay, {Alexander S.} and Daniel Thomas and Jan Vandenberg",
note = "{\circledC} 2009 The Authors. Journal compilation {\circledC} 2009 RAS",
year = "2010",
doi = "10.1111/j.1365-2966.2009.15686.x",
language = "English",
volume = "401",
pages = "1043--1056",
journal = "MNRAS",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "2",

}

RIS

TY - JOUR

T1 - Galaxy Zoo

T2 - the fraction of merging galaxies in the SDSS and their morphologies

AU - Darg, Daniel W.

AU - Kaviraj, Sugata

AU - Lintott, Chris J.

AU - Schawinski, Kevin

AU - Sarzi, Marc

AU - Bamford, Steven P.

AU - Silk, Joseph

AU - Proctor, Richard

AU - Andreescu, Dan

AU - Murray, Phil

AU - Nichol, Robert C.

AU - Raddick, M. Jordan

AU - Slosar, Anze

AU - Szalay, Alexander S.

AU - Thomas, Daniel

AU - Vandenberg, Jan

N1 - © 2009 The Authors. Journal compilation © 2009 RAS

PY - 2010

Y1 - 2010

N2 - We present the largest, most homogeneous catalogue of merging galaxies in the nearby Universe obtained through the Galaxy Zoo project – an interface on the World Wide Web enabling large-scale morphological classification of galaxies through visual inspection of images from the Sloan Digital Sky Survey (SDSS). The method converts a set of visually inspected classifications for each galaxy into a single parameter (the ‘weighted-merger-vote fraction,’fm) which describes our confidence that the system is part of an ongoing merger. We describe how fm is used to create a catalogue of 3003 visually selected pairs of merging galaxies from the SDSS in the redshift range 0.005 < z < 0.1. We use our merger sample and values of fm applied to the SDSS Main Galaxy Spectral sample to estimate that the fraction of volume-limited (Mr < −20.55) major mergers (1/3 < M*1/M*2 < 3) in the nearby Universe is 1–3 ×C per cent, where C∼ 1.5 is a correction factor for spectroscopic incompleteness. Having visually classified the morphologies of the constituent galaxies in our mergers, we find that the spiral-to-elliptical ratio of galaxies in mergers is higher by a factor of ∼2 relative to the global population. In a companion paper, we examine the internal properties of these merging galaxies and conclude that this high spiral-to-elliptical ratio in mergers is due to a longer time-scale over which mergers with spirals are detectable compared to mergers with ellipticals.

AB - We present the largest, most homogeneous catalogue of merging galaxies in the nearby Universe obtained through the Galaxy Zoo project – an interface on the World Wide Web enabling large-scale morphological classification of galaxies through visual inspection of images from the Sloan Digital Sky Survey (SDSS). The method converts a set of visually inspected classifications for each galaxy into a single parameter (the ‘weighted-merger-vote fraction,’fm) which describes our confidence that the system is part of an ongoing merger. We describe how fm is used to create a catalogue of 3003 visually selected pairs of merging galaxies from the SDSS in the redshift range 0.005 < z < 0.1. We use our merger sample and values of fm applied to the SDSS Main Galaxy Spectral sample to estimate that the fraction of volume-limited (Mr < −20.55) major mergers (1/3 < M*1/M*2 < 3) in the nearby Universe is 1–3 ×C per cent, where C∼ 1.5 is a correction factor for spectroscopic incompleteness. Having visually classified the morphologies of the constituent galaxies in our mergers, we find that the spiral-to-elliptical ratio of galaxies in mergers is higher by a factor of ∼2 relative to the global population. In a companion paper, we examine the internal properties of these merging galaxies and conclude that this high spiral-to-elliptical ratio in mergers is due to a longer time-scale over which mergers with spirals are detectable compared to mergers with ellipticals.

U2 - 10.1111/j.1365-2966.2009.15686.x

DO - 10.1111/j.1365-2966.2009.15686.x

M3 - Article

VL - 401

SP - 1043

EP - 1056

JO - MNRAS

JF - MNRAS

SN - 0035-8711

IS - 2

ER -

ID: 1522290