Measuring subhalo mass in redMaPPer clusters with CFHT Stripe 82 Survey

Li, Ran; Shan, Huanyuan; Kneib, Jean-Paul; Mo, H. J.; Rozo, Eduardo; Leauthaud, Alexie; Moustakas, John; Xie, Lizhi; Erben, T.; Waerbeke, Ludovic Van; Makler, M.; Rykoff, E. S.; Moraes, Bruno

doi:10.1093/mnras/stw494

Cited by 39 publications

(72 citation statements)

References 112 publications

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“…After these cuts, the galaxy number density for the source catalog is roughly 4.5 gals/arcmin 2 . Li et al (2016) have compared the lensing signal of CMASS and LOWZ galaxies with source galaxies from different redshift bins and shown that the results agree with each within statistical error bars.…”

Section: Observational Datamentioning

confidence: 83%

The Mass–Concentration Relation and the Stellar-to-halo Mass Ratio in the CFHT Stripe 82 Survey

Shan

Kneib

et al. 2017

ApJ

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We present a new measurement of the mass-concentration relation and the stellar-to-halo mass ratio over the halo mass range 5 × 10 12 to 2 × 10 14 M . To achieve this, we use weak lensing measurements from the CFHT Stripe 82 Survey (CS82), combined with the central galaxies from the redMaPPer cluster catalogue and the LOWZ/CMASS galaxy sample of the Sloan Digital Sky Survey-III Baryon Oscillation Spectroscopic Survey Tenth Data Release. The stacked lensing signals around these samples are modeled as a sum of contributions from the central galaxy, its dark matter halo, and the neighboring halos, as well as a term for possible centering errors. We measure the mass-concentration relation:B with A = 5.24 ± 1.24, B = −0.13 ± 0.10 for 0.2 < z < 0.4 and A = 6.61 ± 0.75, B = −0.15 ± 0.05 for 0.4 < z < 0.6. These amplitudes and slopes are completely consistent with predictions from recent simulations. We also measure the stellar-to-halo mass ratio for our samples, and find results consistent with previous measurements from lensing and other techniques.

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Section: Observational Datamentioning

confidence: 83%

The Mass–Concentration Relation and the Stellar-to-halo Mass Ratio in the CFHT Stripe 82 Survey

Shan

Kneib

et al. 2017

ApJ

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“…As the CS82 is i-band imaging survey, the photometric redshifts (photo-z) are obtained by using BPZ method (Benítez 2000;Coe et al 2006) and computed by (Bundy et al 2015). Some tests on the systematics induced by photoz error are shown in (Li et al 2016). The total number of source galaxies in this work is 4,381,917.…”

Section: Lensing Shear Catalogmentioning

confidence: 99%

Do satellite galaxies trace matter in galaxy clusters?

Wang

Gao

et al. 2018

Monthly Notices of the Royal Astronomical Society

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The spatial distribution of satellite galaxies encodes rich information of the structure and assembly history of galaxy clusters. In this paper, we select a redMaPPer cluster sample in SDSS Stripe 82 region with 0.1 ≤ z ≤ 0.33, 20 < λ < 100 and P cen > 0.7. Using the high-quality weak lensing data from CS82 Survey, we constrain the mass profile of this sample. Then we compare directly the mass density profile with the satellite number density profile. We find that the total mass and number density profiles have the same shape, both well fitted by an NFW profile. The scale radii agree with each other within 1σ error (r s,gal = 0.34 +0.04 −0.03 Mpc vs r s = 0.37 +0.15 −0.10 Mpc ).

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“…Since the lensing and clustering signals of subhaloes are dwarfed by their massive host clusters, it is more difficult to study their detailed mass distributions. Recent progress in determining weak lensing masses of subhaloes has been made by Li et al (2016) using Canada-FranceHawaii Telescope (CFHT) Stripe-82 data (Erben et al 2013) and by Sifón et al (2015) with KiDS data (Kuijken et al 2015). While simulation studies of subhaloes predict that tidal forces from the host cluster will strip mass from the subhalo outskirts (Hayashi et al 2003;Gao et al 2004), the recent lensing studies were not able to identify a tidal radius beyond which mass was stripped.…”

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confidence: 99%

Tidal stripping as a test of satellite quenching in redMaPPer clusters

Clampitt

Dalal

Jain

et al. 2016

Mon. Not. R. Astron. Soc.

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When dark matter haloes are accreted by massive host clusters, strong gravitational tidal forces begin stripping mass from the accreted subhaloes. This stripping eventually removes all mass beyond a subhalo's tidal radius, with unbound mass remaining in the vicinity of the satellite for at most a dynamical time t dyn . The N-body subhalo study of Chamberlain et al. verified this picture and pointed out a useful observational consequence: correlations between subhaloes beyond the tidal radius are sensitive to the infall time, t infall , of the subhalo on to its host. We perform this correlation using ∼160 000 red satellite galaxies in Sloan Digital Sky Survey redMaPPer clusters and find evidence that subhalo correlations do persist well beyond the tidal radius, suggesting that many of the observed satellites fell into their current host less than a dynamical time ago, t infall < t dyn . Combined with estimated dynamical times t dyn ∼ 3-5 Gyr and SED fitting results for the time at which satellites stopped forming stars, t quench ∼ 6 Gyr, we infer that for a significant fraction of the satellites, star formation quenched before those satellites entered their current hosts. The result holds for red satellites over a large range of cluster-centric distances 0.1-0.6 Mpc h −1 . We discuss the implications of this result for models of galaxy formation.

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Measuring subhalo mass in redMaPPer clusters with CFHT Stripe 82 Survey

Cited by 39 publications

References 112 publications

The Mass–Concentration Relation and the Stellar-to-halo Mass Ratio in the CFHT Stripe 82 Survey

The Mass–Concentration Relation and the Stellar-to-halo Mass Ratio in the CFHT Stripe 82 Survey

Do satellite galaxies trace matter in galaxy clusters?

Tidal stripping as a test of satellite quenching in redMaPPer clusters

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