TDCOSMO - XIX. Measuring stellar velocity dispersion with sub-percent accuracy for cosmography

Open Access

Table 2.

Summary of results.

Sample	$⟨ δ \bar{σ} / \bar{σ} ⟩$ $\langle \delta \bar{\sigma}/\bar{\sigma}\rangle$	$⟨ Δ \bar{σ} / \bar{σ} ⟩$ $\langle \Delta \bar{\sigma}/\bar{\sigma}\rangle$	$\sqrt{{⟨ C_{i, j} \bar{σ} / \bar{σ_{i}} \bar{σ_{j}} ⟩}_{i \neq j}}$ $\sqrt{\langle C_{i,j}\bar{\sigma}/\bar{\sigma_i}\bar{\sigma_j}\rangle _{i\neq j}}$	$⟨ Δ_{B} \bar{σ} / \bar{σ} ⟩$ $\langle \Delta_B \bar{\sigma}/\bar{\sigma}\rangle$	$\sqrt{{⟨ C_{B, i, j} \bar{σ} / \bar{σ_{i}} \bar{σ_{j}} ⟩}_{i \neq j}}$ $\sqrt{\langle C_{B,i,j}\bar{\sigma}/\bar{\sigma_i}\bar{\sigma_j}\rangle _{i\neq j}}$	Indo-US	XSL	MILES
MUSE-BIC	2.04%	0.21%	0.12%	0.78%	0.45%	0.96	0.04	0
KCWI-BIC	0.86%	0.02%	0.01%	0.67%	0.47%	0.9995	0	0.0005
NIRSpec-BIC	5.73%	0.60%	0.13%	0.85%	0.19%	0.47	0.53	–
SDSS-BIC	3.24%	0.01%	0.01%	1.46%	1.27%	0.00001	0.99998	0.00001

MUSE	2.04%	0.78%	0.47%	0.95%	0.58%	0.333	0.333	0.333
KCWI	0.90%	0.79%	0.70%	0.97%	0.86%	0.333	0.333	0.333
NIRSpec	5.74%	0.60%	0.14%	0.85%	0.19%	0.5	0.5	–
SDSS	3.30%	1.30%	1.15%	1.60%	1.40%	0.333	0.333	0.333

Notes. For each dataset, we report the average statistical error, the average systematic uncertainty associated with the choice of clean template library, the average amplitude of the off-diagonal terms of the covariance matrix between elements of the sample, the Bessel-corrected average systematic uncertainty and off-diagonal covariance matrix, and the weights given to the three libraries. The top part of the table reports the results obtained by weighting the three clean stellar libraries according to the BIC as described in Section 5. The bottom part of the table reports the results based on equal weights. See text for details.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.