Miscentring in galaxy clusters: dark matter to brightest cluster galaxy offsets in 10,000 SDSS clusters
We characterise the typical offset between the Dark Matter (DM) projected centre and the Brightest Cluster Galaxy (BCG) in 10,000 SDSS clusters. To place constraints on the centre of DM, we use an automated strong-lensing analysis, mass-modelling technique which is based on the well-tested assumptio...
Gespeichert in:
| Hauptverfasser: | , |
|---|---|
| Dokumenttyp: | Article (Journal) Kapitel/Artikel |
| Sprache: | Englisch |
| Veröffentlicht: |
11 Sep 2012
|
| In: |
Arxiv
|
| Online-Zugang: | Verlag, kostenfrei, Volltext: http://arxiv.org/abs/1208.1766
|
| Verfasserangaben: | Adi Zitrin, Matthias Bartelmann, Keiichi Umetsu, Masamune Oguri, Tom Broadhurst |
MARC
| LEADER | 00000caa a2200000 c 4500 | ||
|---|---|---|---|
| 001 | 1563690977 | ||
| 003 | DE-627 | ||
| 005 | 20220813225356.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 170921s2012 xx |||||o 00| ||eng c | ||
| 035 | |a (DE-627)1563690977 | ||
| 035 | |a (DE-576)493690972 | ||
| 035 | |a (DE-599)BSZ493690972 | ||
| 035 | |a (OCoLC)1340979299 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rda | ||
| 041 | |a eng | ||
| 084 | |a 29 |2 sdnb | ||
| 100 | 1 | |a Zitrin, Adi |e VerfasserIn |0 (DE-588)1049616359 |0 (DE-627)782391079 |0 (DE-576)403602785 |4 aut | |
| 245 | 1 | 0 | |a Miscentring in galaxy clusters |b dark matter to brightest cluster galaxy offsets in 10,000 SDSS clusters |c Adi Zitrin, Matthias Bartelmann, Keiichi Umetsu, Masamune Oguri, Tom Broadhurst |
| 264 | 1 | |c 11 Sep 2012 | |
| 300 | |a 15 | ||
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a Computermedien |b c |2 rdamedia | ||
| 338 | |a Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Gesehen am 21.09.2017 | ||
| 520 | |a We characterise the typical offset between the Dark Matter (DM) projected centre and the Brightest Cluster Galaxy (BCG) in 10,000 SDSS clusters. To place constraints on the centre of DM, we use an automated strong-lensing analysis, mass-modelling technique which is based on the well-tested assumption that light traces mass. The cluster galaxies are modelled with a steep power-law, and the DM component is obtained by smoothing the galaxy distribution fitting a low-order 2D polynomial (via spline interpolation), while probing a whole range of polynomial degrees and galaxy power laws. We find that the offsets between the BCG and the peak of the smoothed light map representing the DM, \Delta, are distributed equally around zero with no preferred direction, and are well described by a log-normal distribution with <log_{10}(\Delta [h^{-1} Mpc])>=-1.895^{+0.003}_{-0.004}, and \sigma=0.501\pm0.004 (95% confidence levels), or <log_{10}(\Delta [\arcsec])>=0.564\pm0.005, and \sigma=0.475\pm0.007. Some of the offsets originate in prior misidentifications of the BCG or other bright cluster members by the cluster finding algorithm, whose level we make an additional effort to assess, finding that ~10% of the clusters in the probed catalogue are likely to be misidentified, contributing to higher-end offsets in general agreement with previous studies. Our results constitute the first statistically-significant high-resolution distributions of DM-to-BCG offsets obtained in an observational analysis, and importantly show that there exists such a typical non-zero offset in the probed catalogue. The offsets show a weak positive correlation with redshift, so that higher separations are generally found for higher-z clusters in agreement with the hierarchical growth of structure, which in turn could help characterise the merger, relaxation and evolution history of clusters, in future studies. [ABRIDGED] | ||
| 650 | 4 | |a Astrophysics - Cosmology and Nongalactic Astrophysics | |
| 700 | 1 | |a Bartelmann, Matthias |d 1965- |e VerfasserIn |0 (DE-588)141554185 |0 (DE-627)629953090 |0 (DE-576)170611779 |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Arxiv |d Ithaca, NY : Cornell University, 1991 |g (2012) Artikel-Nummer 1208.1766, 15 Seiten |h Online-Ressource |w (DE-627)509006531 |w (DE-600)2225896-6 |w (DE-576)28130436X |7 nnas |a Miscentring in galaxy clusters dark matter to brightest cluster galaxy offsets in 10,000 SDSS clusters |
| 773 | 1 | 8 | |g year:2012 |g extent:15 |a Miscentring in galaxy clusters dark matter to brightest cluster galaxy offsets in 10,000 SDSS clusters |
| 856 | 4 | 0 | |u http://arxiv.org/abs/1208.1766 |x Verlag |z kostenfrei |3 Volltext |
| 951 | |a AR | ||
| 992 | |a 20170921 | ||
| 993 | |a Article | ||
| 998 | |g 141554185 |a Bartelmann, Matthias |m 141554185:Bartelmann, Matthias |d 700000 |d 714000 |d 714200 |e 700000PB141554185 |e 714000PB141554185 |e 714200PB141554185 |k 0/700000/ |k 1/700000/714000/ |k 2/700000/714000/714200/ |p 2 | ||
| 998 | |g 1049616359 |a Zitrin, Adi |m 1049616359:Zitrin, Adi |d 700000 |d 714000 |d 714200 |e 700000PZ1049616359 |e 714000PZ1049616359 |e 714200PZ1049616359 |k 0/700000/ |k 1/700000/714000/ |k 2/700000/714000/714200/ |p 1 |x j | ||
| 999 | |a KXP-PPN1563690977 |e 2981174886 | ||
| BIB | |a Y | ||
| JSO | |a {"language":["eng"],"name":{"displayForm":["Adi Zitrin, Matthias Bartelmann, Keiichi Umetsu, Masamune Oguri, Tom Broadhurst"]},"note":["Gesehen am 21.09.2017"],"recId":"1563690977","person":[{"given":"Adi","display":"Zitrin, Adi","role":"aut","family":"Zitrin"},{"family":"Bartelmann","role":"aut","display":"Bartelmann, Matthias","given":"Matthias"}],"physDesc":[{"extent":"15 S."}],"id":{"eki":["1563690977"]},"title":[{"title":"Miscentring in galaxy clusters","subtitle":"dark matter to brightest cluster galaxy offsets in 10,000 SDSS clusters","title_sort":"Miscentring in galaxy clusters"}],"type":{"media":"Online-Ressource","bibl":"chapter"},"origin":[{"dateIssuedKey":"2012","dateIssuedDisp":"11 Sep 2012"}],"relHost":[{"type":{"media":"Online-Ressource","bibl":"edited-book"},"disp":"Miscentring in galaxy clusters dark matter to brightest cluster galaxy offsets in 10,000 SDSS clustersArxiv","titleAlt":[{"title":"Arxiv.org"},{"title":"Arxiv.org e-print archive"},{"title":"Arxiv e-print archive"},{"title":"De.arxiv.org"}],"part":{"year":"2012","text":"(2012) Artikel-Nummer 1208.1766, 15 Seiten","extent":"15"},"language":["eng"],"note":["Gesehen am 28.05.2024"],"pubHistory":["1991 -"],"id":{"zdb":["2225896-6"],"eki":["509006531"]},"physDesc":[{"extent":"Online-Ressource"}],"title":[{"title_sort":"Arxiv","title":"Arxiv"}],"origin":[{"dateIssuedDisp":"1991-","publisher":"Cornell University ; Arxiv.org","publisherPlace":"Ithaca, NY ; [Erscheinungsort nicht ermittelbar]","dateIssuedKey":"1991"}],"recId":"509006531"}]} | ||
| SRT | |a ZITRINADIBMISCENTRIN1120 | ||