scholarly journals Systematic Errors in the Hubble Constant Measurement from the Sunyaev‐Zel’dovich Effect

2008 ◽  
Vol 674 (1) ◽  
pp. 11-21 ◽  
Author(s):  
Hajime Kawahara ◽  
Tetsu Kitayama ◽  
Shin Sasaki ◽  
Yasushi Suto
Keyword(s):  
Hubble Constant ◽  
Systematic Errors ◽  
Constant Measurement ◽  
Sunyaev Zel'dovich Effect

Systematic Errors in the Hubble Constant Based upon Measurement of the Sunyaev‐Zeldovich Effect

1997 ◽  
Vol 482 (2) ◽  
pp. 588-603 ◽  
Author(s):  
Kurt Roettiger ◽  
James M. Stone ◽  
Richard F. Mushotzky
Keyword(s):  
Hubble Constant ◽  
Systematic Errors

Robustness of the Sunyaev-Zel'dovich Effect as a Measure of the Hubble Constant

2001 ◽  
Vol 18 (4) ◽  
pp. 622-624 ◽  
Author(s):  
Cao Li ◽  
Zhang Yuan-Zhong ◽  
Zhu Zong-Hong
Keyword(s):  
Hubble Constant ◽  
Sunyaev Zel'dovich Effect

scholarly journals Sunyaev-Zel'dovich Effect Observation Project with the Nobeyama 45-m Telescope

1998 ◽  
Vol 188 ◽  
pp. 330-331
Author(s):  
M. Tsuboi ◽  
T. Ohno ◽  
A. Miyazaki ◽  
T. Kasuga ◽  
A. Sakamoto ◽  
...  
Keyword(s):  
Hubble Constant ◽  
Field Of View ◽  
Reliable Measurement ◽  
Sis Mixer ◽  
X Ray ◽  
Cluster Of Galaxies ◽  
Scientific Goal ◽  
The World ◽  
Wave Observation ◽  
Sunyaev Zel'dovich Effect

The combination of X-ray and Sunyaev-Zel'dovich (S-Z) effect observations toward cluster of galaxies gives the independent estimation of Hubble constant (Sunyaev and Zel'dovich 1970). The measurement of S-Z effect is one of the most difficult observations in radioastronomy because of the weakness of the effect, ΔT = 0.1 × 1 mK (e.g. Rephaeli 1995). Because the field of view of the exist interferometers is smaller than the extended distribution of S-Z effect of low redshifted clusters, single-dish telescopes gain an advantage over interferometers. In addition, to reduce the contaminations from Galaxy and galaxies in the cluster, the mm-wave observation is preferable. Thus, we have started the project of S-Z effect observation with the Nobeyama 45-m telescope, which is the largest mm-wave telescope in the world. Our scientific goal is reliable measurement of S-Z effect of many clusters. To realize this we have made a multi-feed PCTJ-SIS mixer receiver at 40 GHz as a sophisticated tool for the observation of S-Z effect (Noguchi et al. 1995, Kasuga et al. 1995, Tsuboi et al. 1997).

scholarly journals Hot Electrons and Cold Photons: Galaxy Clusters and the Sunyaev-Zel'dovich Effect

1998 ◽  
Vol 188 ◽  
pp. 189-192
Author(s):  
J.P. Hughes
Keyword(s):  
Background Radiation ◽  
Hubble Constant ◽  
Clusters Of Galaxies ◽  
Microwave Background ◽  
Hot Gas ◽  
Wide Range ◽  
Inverse Compton ◽  
Microwave Background Radiation ◽  
Sunyaev Zel'dovich Effect ◽  
Bremsstrahlung Emission

The hot gas in clusters of galaxies emits thermal bremsstrahlung emission that can be probed directly through measurements in the X-ray band. Another probe of this gas comes from its effect on the cosmic microwave background radiation (CMBR): the hot cluster electrons inverse Compton scatter the CMBR photons and thereby distort the background radiation from its blackbody spectral form. Although this, the Sunyaev-Zel'dovich (SZ) effect, is quite small, heroic efforts during the 1980's resulted in its detection in three moderately distant clusters of galaxies: A665, A2218, and CL 0016+16. It is well known that one of the purposes of conducting such measurements is to determine the Hubble constant. The technique has generated considerable interest because it is independent of all other rungs of the cosmic distance ladder and is effective over a wide range of redshifts: ~0.02 to ~1.

scholarly journals A measurement of the Hubble constant from Type II supernovae

2020 ◽  
Vol 496 (3) ◽  
pp. 3402-3411 ◽  
Author(s):  
T de Jaeger ◽  
B E Stahl ◽  
W Zheng ◽  
A V Filippenko ◽  
A G Riess ◽  
...  
Keyword(s):  
Cold Dark Matter ◽  
Background Radiation ◽  
Hubble Constant ◽  
Systematic Errors ◽  
Host Galaxy ◽  
Microwave Background Radiation ◽  
Type Ia ◽  
Cepheid Variables ◽  
Red Giant ◽  
Ia Supernovae

ABSTRACT Progressive increases in the precision of the Hubble-constant measurement via Cepheid-calibrated Type Ia supernovae (SNe Ia) have shown a discrepancy of ∼4.4σ with the current value inferred from Planck satellite measurements of the cosmic microwave background radiation and the standard $\Lambda $cold dark matter (ΛCDM) cosmological model. This disagreement does not appear to be due to known systematic errors and may therefore be hinting at new fundamental physics. Although all of the current techniques have their own merits, further improvement in constraining the Hubble constant requires the development of as many independent methods as possible. In this work, we use SNe II as standardisable candles to obtain an independent measurement of the Hubble constant. Using seven SNe II with host-galaxy distances measured from Cepheid variables or the tip of the red giant branch, we derive H$_0= 75.8^{+5.2}_{-4.9}$ km s−1 Mpc−1 (statistical errors only). Our value favours that obtained from the conventional distance ladder (Cepheids + SNe Ia) and exhibits a difference of 8.4 km s−1 Mpc−1 from the Planck + ΛCDM value. Adding an estimate of the systematic errors (2.8 km s−1 Mpc−1) changes the ∼1.7σ discrepancy with Planck +ΛCDM to ∼1.4σ. Including the systematic errors and performing a bootstrap simulation, we confirm that the local H0 value exceeds the value from the early Universe with a confidence level of 95 per cent. As in this work, we only exchange SNe II for SNe Ia to measure extragalactic distances, we demonstrate that there is no evidence that SNe Ia are the source of the H0 tension.

Test of the cosmic transparency with the standard candles and the standard ruler

2018 ◽  
Vol 27 (05) ◽  
pp. 1850054 ◽  
Author(s):  
Jun Chen
Keyword(s):  
Observational Data ◽  
Confidence Level ◽  
Free Parameter ◽  
Hubble Constant ◽  
Systematic Errors ◽  
Acoustic Oscillation ◽  
Independent Method ◽  
Baryon Acoustic Oscillation ◽  
Type Ia ◽  
Model Independent

In this paper, the cosmic transparency is constrained by using the latest baryon acoustic oscillation (BAO) data and the type Ia supernova data with a model-independent method. We find that a transparent universe is consistent with observational data at the [Formula: see text] confidence level, except for the case of BAO+ Union 2.1 without the systematic errors where a transparent universe is favored only at the [Formula: see text] confidence level. To investigate the effect of the uncertainty of the Hubble constant on the test of the cosmic opacity, we assume [Formula: see text] to be a free parameter and obtain that the observations favor a transparent universe at the [Formula: see text] confidence level.

scholarly journals H0 from Distant Clusters of Galaxies Observed with ASCA

1999 ◽  
Vol 183 ◽  
pp. 66-66 ◽  
Author(s):  
A. Furuzawa ◽  
Y. Tawara ◽  
K. Yamashita ◽  
S. Miyoshi ◽  
M. Matsuura
Keyword(s):  
Spatial Distribution ◽  
Density Distribution ◽  
Hubble Constant ◽  
Clusters Of Galaxies ◽  
Intracluster Medium ◽  
X Ray ◽  
Sunyaev Zel'dovich Effect

ASCA, Japanese X-ray Sattelite, can obtain the spatial distribution of density and temperature of the intracluster medium at the same time and greatly improve the accuracy for the derivation of the Hubble constant using the thermal Sunyaev-Zel'dovich effect. Table 1 shows the results of ASCA observations of 4 distant clusters of galaxies. The parameters of the density distribution were obtained assuming the β model.

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