CARNEGIE HUBBLE PROGRAM: A MID-INFRARED CALIBRATION OF THE HUBBLE CONSTANT

By W. Freedman, B. Madore, V. Scowcroft, C. Burns, A. Monson, S. E. Persson, M. Seibert, J. Rigby. 2012

372 citations recorded by the source corpus.

Using a mid-infrared calibration of the Cepheid distance scale based on recent observations at 3.6 μm with the Spitzer Space Telescope, we have obtained a new, high-accuracy calibration of the Hubble constant. We have established the mid-IR zero point of the Leavitt law (the Cepheid period–luminosity relation) using time-averaged 3.6 μm data for 10 high-metallicity, Milky Way Cepheids having independently measured trigonometric parallaxes. We have adopted the slope of the PL relation using time-averaged 3.6 μm data for 80 long-period Large Magellanic Cloud (LMC) Cepheids falling in the period range 0.8 < log(P) < 1.8. We find a new reddening-corrected distance to the LMC of 18.477 ± 0.033 (systematic) mag. We re-examine the systematic uncertainties in H0, also taking into account new data over the past decade. In combination with the new Spitzer calibration, the systematic uncertainty in H0 over that obtained by the Hubble Space Telescope Key Project has decreased by over a factor of three. Applying the Spitzer calibration to the Key Project sample, we find a value of H0 = 74.3 with a systematic uncertainty of ±2.1 (systematic) km s−1 Mpc−1, corresponding to a 2.8% systematic uncertainty in the Hubble constant. This result, in combination with WMAP7 measurements of the cosmic microwave background anisotropies and assuming a flat universe, yields a value of the equation of state for dark energy, w0 = −1.09 ± 0.10. Alternatively, relaxing the constraints on flatness and the numbers of relativistic species, and combining our results with those of WMAP7, Type Ia supernovae and baryon acoustic oscillations yield w0 = −1.08 ± 0.10 and a value of Neff = 4.13 ± 0.67, mildly consistent with the existence of a fourth neutrino species.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/ac9c4a0b97c9fdba07d4af99c2400a70301cd72a

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

Citations in the corpus

Constraining dark matter-neutrino interactions using the CMB and large-scale structure (2014, methodology): “Therefore, as can be seen in table 1, with the addition of DM-neutrino interactions, the ‘Planck + WP’ data can accommodate very large values of Neff (compatible with one thermalised species of extra relics) and h (in excellent agreement with direct measurements at the 1σ level [47, 48]).”
H0LiCOW - IV. Lens mass model of HE 0435-1223 and blind measurement of its time-delay distance for cosmology (2016, methodology): “This method is independent of the cosmic distance ladder (e.g., Riess et al. 2011; Freedman et al. 2012) and serves as a key test of possible systematic effects in individual H0 probes.”
H0LiCOW - V. New COSMOGRAIL time delays of HE 0435-1223: H0 to 3.8 per cent precision from strong lensing in a flat ΛCDM model (2016, background): “ature (see e.g. Freedman et al. 2012; Collett & Auger 2014).”
H0LiCOW – XIII. A 2.4 per cent measurement of H0 from lensed quasars: 5.3σ tension between early- and late-Universe probes (2019, methodology): “Type Ia SNe luminosities are typically calibrated via the ‘distance ladder’ (e.g. Sandage et al. 2006; Freedman et al. 2012; Riess et al. 2016, 2018, 2019), in which parallax measurements are used to determine distances to nearby Cepheid variable stars (which have a known period–luminosity…”
CONSTRAINTS ON COSMOLOGY FROM THE COSMIC MICROWAVE BACKGROUND POWER SPECTRUM OF THE 2500 deg2 SPT-SZ SURVEY (2012, methodology): “Accounting for both statistical and systematic sources of uncertainty, Riess et al. (2011) conclude that H0 = 73.8± 2.4 km/s/Mpc. Freedman et al. (2012) recently released a new analysis of the HST Key Project, with a Spitzer-based calibration of the Cepheid distance scale, in which they find H0 =…”
The Intrinsic Alignment of Galaxies and its Impact on Weak Gravitational Lensing in an Era of Precision Cosmology (2014, background): “, 2012), constraints on H0 (Riess et al., 2011; Freedman et al., 2012), type Ia supernovae (SNe Ia) (Guy et al.”
The clustering of the SDSS DR7 Main Galaxy Sample I: a 4 per cent distance measure at z=0.15 (2014, methodology): “The MGS BAO measurement therefore increases the tension between Planck+BAO measurements of H0, and those obtained using direct detection, e.g., the measurements by Efstathiou (2014) of H0 = 72.5 ± 2.5, Riess et al. (2011) of H0 = 73.8 ± 2.4, and Freedman et al. (2012) of H0 = 74.3± 2.1.”
TWO ACCURATE TIME-DELAY DISTANCES FROM STRONG LENSING: IMPLICATIONS FOR COSMOLOGY (2012, methodology): “Gravitational time delays are a one-step cosmological method to determine the Hubble constant that is completely independent of the local cosmic distance ladder (Freedman et al. 2001, 2012; Riess et al. 2011; Reid et al. 2012).”
Rock ‘n’ roll solutions to the Hubble tension (2019, background): “We consider a flat prior on n ∈ [2 , 6].”
Measuring the Hubble constant with Type Ia supernovae as near-infrared standard candles (2017, background): “…with high-z Type Ia supernova (SN Ia; Betoule et al. 2014), baryon acoustic oscillation (BAO; Alam et al. 2016) and cosmic microwave background (CMB; Planck Collaboration et al. 2016a) can offer key insights into the dark energy equation of state (Freedman et al. 2012; Riess et al. 2011, 2016).”
COSMOLOGY FROM GRAVITATIONAL LENS TIME DELAYS AND PLANCK DATA (2013, methodology): “The inferred H0 value from Planck in the flat ΛCDM model is 67.3±1.2 km s−1Mpc−1.”
Elucidating ΛCDM: Impact of Baryon Acoustic Oscillation Measurements on the Hubble Constant Discrepancy (2017, background): “While the constraints have become tighter, the mean H0 values in recent years have remained fairly constant (e.g., Riess et al. 2009, 2011; Freedman et al. 2012).”