Sign on

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:0811.3970)
· References in the article
· Citations to the Article (19) (Citation History)
· Refereed Citations to the Article
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Galaxy Zoo: disentangling the environmental dependence of morphology and colour
Authors:
Skibba, Ramin A.; Bamford, Steven P.; Nichol, Robert C.; Lintott, Chris J.; Andreescu, Dan; Edmondson, Edward M.; Murray, Phil; Raddick, M. Jordan; Schawinski, Kevin; Slosar, Anže; Szalay, Alexander S.; Thomas, Daniel; Vandenberg, Jan
Affiliation:
AA(Max-Planck-Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg, Germany), AB(Institute of Cosmology and Gravitation, University of Portsmouth, Mercantile House, Hampshire Terrace, Portsmouth PO1 2EG; Centre for Astronomy and Particle Theory, University of Nottingham, University Park, Nottingham NG7 2RD), AC(Institute of Cosmology and Gravitation, University of Portsmouth, Mercantile House, Hampshire Terrace, Portsmouth PO1 2EG), AD(Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH), AE(LinkLab, 4506 Graystone Ave., Bronx, NY 10471, USA), AF(Institute of Cosmology and Gravitation, University of Portsmouth, Mercantile House, Hampshire Terrace, Portsmouth PO1 2EG), AG(Fingerprint Digital Media, 9 Victoria Close, Newtownards, Co. Down, Northern Ireland BT23 7GY), AH(Department of Physics and Astronomy, The Johns Hopkins University, Homewood Campus, Baltimore, MD 21218, USA), AI(Yale Center for Astronomy and Astrophysics, Yale University, PO Box 208121, New Haven, CT 06520, USA), AJ(Berkeley Center for Cosmological Physics, Lawrence Berkeley National Lab. & Physics Department, University of California, Berkeley, CA 94720, USA), AK(Department of Physics and Astronomy, The Johns Hopkins University, Homewood Campus, Baltimore, MD 21218, USA), AL(Institute of Cosmology and Gravitation, University of Portsmouth, Mercantile House, Hampshire Terrace, Portsmouth PO1 2EG), AM(Department of Physics and Astronomy, The Johns Hopkins University, Homewood Campus, Baltimore, MD 21218, USA)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 399, Issue 2, pp. 966-982. (MNRAS Homepage)
Publication Date:
10/2009
Origin:
MNRAS
MNRAS Keywords:
methods: statistical , galaxies: clusters: general , galaxies: evolution , galaxies: haloes , galaxies: structure , large-scale structure of Universe
DOI:
10.1111/j.1365-2966.2009.15334.x
Bibliographic Code:
2009MNRAS.399..966S

Abstract

We analyse the environmental dependence of galaxy morphology and colour with two-point clustering statistics, using data from the Galaxy Zoo, the largest sample of visually classified morphologies yet compiled, extracted from the Sloan Digital Sky Survey. We present two-point correlation functions of spiral and early-type galaxies, and we quantify the correlation between morphology and environment with marked correlation functions. These yield clear and precise environmental trends across a wide range of scales, analogous to similar measurements with galaxy colours, indicating that the Galaxy Zoo classifications themselves are very precise. We measure morphology marked correlation functions at fixed colour and find that they are relatively weak, with the only residual correlation being that of red galaxies at small scales, indicating a morphology gradient within haloes for red galaxies. At fixed morphology, we find that the environmental dependence of colour remains strong, and these correlations remain for fixed morphology and luminosity. An implication of this is that much of the morphology-density relation is due to the relation between colour and density. Our results also have implications for galaxy evolution: the morphological transformation of galaxies is usually accompanied by a colour transformation, but not necessarily vice versa. A spiral galaxy may move on to the red sequence of the colour-magnitude diagram without quickly becoming an early type. We analyse the significant population of red spiral galaxies, and present evidence that they tend to be located in moderately dense environments and are often satellite galaxies in the outskirts of haloes. Finally, we combine our results to argue that central and satellite galaxies tend to follow different evolutionary paths.

This publication has been made possible by the participation of more than 100000 volunteers in the Galaxy Zoo project. Their contributions are individually acknowledged at http://www.galaxyzoo.org/Volunteers.aspx

E-mail: skibba@mpia.de


Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)

   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints