Measuring the Evolution of the M/L ratio from the Fundamental Plane in Cl 0024+16 at<i>z</i>=0.39

Franx, Marijn; VanDokkum, PG

doi:10.1017/s0074180900232427

Cited by 4 publications

(2 citation statements)

References 28 publications

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“…Several issues may falsify this assumption. One of the most significant is "progenitor-bias", which refers to the issue that samples of ETGs at high redshift might be biased towards the oldest progenitors of present-day early-type galaxies [66,67], therefore not sampling the same population studied at intermediate redshifts. Another effect to be taken into account is the mass evolution of ETGs as a function of redshift, which, when comparing galaxies of the same mass, may alter the shape of the age−z relation.…”

Section: The Importance Of the Differential Approachmentioning

confidence: 99%

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Improved constraints on the expansion rate of the Universe up to z ∼ 1.1 from the spectroscopic evolution of cosmic chronometers

Moresco

Cimatti

Jiménez

et al. 2012

J. Cosmol. Astropart. Phys.

749

365

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Abstract. We present new improved constraints on the Hubble parameter H(z) in the redshift range 0.15 < z < 1.1, obtained from the differential spectroscopic evolution of early-type galaxies as a function of redshift. We extract a large sample of early-type galaxies (∼ 11000) from several spectroscopic surveys, spanning almost 8 billion years of cosmic lookback time (0.15 < z < 1.42). We select the most massive, red elliptical galaxies, passively evolving and without signature of ongoing star formation. Those galaxies can be used as standard cosmic chronometers, as firstly proposed by Jimenez & Loeb (2002), whose differential age evolution as a function of cosmic time directly probesWe analyze the 4000Å break (D4000) as a function of redshift, use stellar population synthesis models to theoretically calibrate the dependence of the differential age evolution on the differential D4000, and estimate the Hubble parameter taking into account both statistical and systematical errors.We provide 8 new measurements of H(z) (see Tab. 4), and determine its change in H(z) to a precision of 5 − 12% mapping homogeneously the redshift range up to z ∼ 1.1; for the first time, we place a constraint on H(z) at z = 0 with a precision comparable with the one achieved for the Hubble constant (about 5-6% at z ∼ 0.2), and covered a redshift range (0.5 < z < 0.8) which is crucial to distinguish many different quintessence cosmologies.These measurements have been tested to best match a ΛCDM model, clearly providing a statistically robust indication that the Universe is undergoing an accelerated expansion. This method shows the potentiality to open a new avenue in constrain a variety of alternative cosmologies, especially when future surveys (e.g. Euclid) will open the possibility to extend it up to z ∼ 2.-1 -

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Section: The Importance Of the Differential Approachmentioning

confidence: 99%

“…It has been firstly introduced by Refs. [66,67], who pointed out that such comparison results biased if the progenitors of the youngest ETGs at low redshift drop out of the sample at high redshift.…”

Section: A1 Estimating the Effect Of The Progenitor-bias On H(z)mentioning

confidence: 99%

Improved constraints on the expansion rate of the Universe up to z ∼ 1.1 from the spectroscopic evolution of cosmic chronometers

Moresco

Cimatti

Jiménez

et al. 2012

J. Cosmol. Astropart. Phys.

749

365

View full text Add to dashboard Cite

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Identifying the progenitor set of present-day early-type galaxies: a view from the standard model

Kaviraj

Devriendt

Ferreras³

et al. 2009

A&A

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We present a comprehensive theoretical study, using a semi-analytical model within the standard LCDM framework, of the photometric properties of the progenitors of present-day early-type galaxies in the redshift range 0 < z < 1. We explore progenitors of all morphologies and study their characteristics as a function of the luminosity and local environment of the early-type remnant at z = 0. In agreement with previous studies, we find that, while larger early-types are generally assembled later, their luminosity-weighted stellar ages are typically older. In dense cluster-like environments, ∼70 percent of early-type systems are "in place" by z = 1 and evolve without interactions thereafter, while in the field the corresponding value is ∼30 percent. Averaging across all environments at z ∼ 1, less than 50 percent of the stellar mass which ends up in early-types today is actually in early-type progenitors at this redshift, in agreement with recent observational work. The corresponding value is ∼65 percent in clusters, due to faster morphological evolution in such dense environments. We develop probabilistic prescriptions which provide a means of including spiral (i.e. non early-type) progenitors at intermediate and high redshifts, based on their luminosity and optical colours. For example, we find that, at intermediate redshifts (z ∼ 0.5), large (M V < −21.5), red (B − V > 0.7) spirals have ∼75-95 percent chance of being an early-type progenitor, while the corresponding probability for large blue spirals (M B < −21.5, B − V < 0.7) is ∼50-75 percent. The prescriptions developed here can be used to address, from the perspective of the standard model, the issue of "progenitor bias", whereby the exclusion of late-type progenitors in observational studies can lead to inaccurate conclusions regarding the evolution of the early-type population over cosmic time. Finally, we explore the correspondence between the true "progenitor set" of the present-day early-type population -defined as the set of all galaxies that are progenitors of present-day early-types regardless of their morphologies -and the frequently used "red-sequence", defined as the set of galaxies within the part of the colour-magnitude space which is dominated by early-type objects. We find that, while more massive members (M V ≤ −21) of the "red sequence" trace the progenitor set reasonably well, the relationship breaks down at fainter luminosities (M V ≥ −21). Thus, while the results of recent observational studies which exploit the red sequence are valid (since they are largely restricted to massive galaxies), more care should be taken when deeper observations (which will probe fainter luminosities) become available in the future.

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The VIMOS Public Extragalactic Redshift Survey (VIPERS)

Gargiulo

Bolzonella

Scodeggio

et al. 2017

A&A

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We use the final data from the VIPERS redshift survey to extract an unparalleled sample of more than 2000 massive M ≥1011 M ⊙ passive galaxies (MPGs) at redshift 0.5 ≤ z ≤ 1.0, based on their NUVrK colours. This enables us to investigate how the population of these objects was built up over cosmic time. We find that the evolution of the number density depends on the galaxy mean surface stellar mass density, Σ. In particular, dense (Σ ≥ 2000 M ⊙ pc −2 ) MPGs show a constant comoving number density over this redshift range, whilst this increases by a factor ∼ 4 for the least dense objects, defined as having Σ < 1000 M ⊙ pc −2 . We estimate stellar ages for the MPG population both fitting the Spectral Energy Distribution (SED) and through the D4000 n index, obtaining results in good agreement. Our findings are consistent with passive ageing of the stellar content of dense MPGs. We show that at any redshift the less dense MPGs are younger than dense ones and that their stellar populations evolve at a slower rate than predicted by passive evolution. This points to a scenario in which the overall population of MPGs was built up over the cosmic time by continuous addition of less dense galaxies: on top of an initial population of dense objects that passively evolves, new, larger, and younger MPGs continuously join the population at later epochs. Finally, we demonstrate that the observed increase in the number density of MPGs is totally accounted for by the observed decrease in the number density of correspondingly massive star forming galaxies (i.e. all the nonpassive M ≥10 11 M ⊙ objects). Such systems observed at z ≃ 1 in VIPERS, therefore, represent the most plausible progenitors of the subsequent emerging class of larger MPGs.

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Measuring the Evolution of the M/L ratio from the Fundamental Plane in Cl 0024+16 atz=0.39

Cited by 4 publications

References 28 publications

Improved constraints on the expansion rate of the Universe up to z ∼ 1.1 from the spectroscopic evolution of cosmic chronometers

Improved constraints on the expansion rate of the Universe up to z ∼ 1.1 from the spectroscopic evolution of cosmic chronometers

Identifying the progenitor set of present-day early-type galaxies: a view from the standard model

The VIMOS Public Extragalactic Redshift Survey (VIPERS)

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