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First Cosmological Results using Type Ia Supernovae from the Dark Energy Survey: Measurement of the Hubble Constant

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arxiv 1811.02376 v2 pith:CX7IABYJ submitted 2018-11-06 astro-ph.CO

First Cosmological Results using Type Ia Supernovae from the Dark Energy Survey: Measurement of the Hubble Constant

E. Macaulay , R. C. Nichol , D. Bacon , D. Brout , T. M. Davis , B. Zhang , B. A. Bassett , D. Scolnic
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A. M\"oller C. B. D'Andrea S. R. Hinton R. Kessler A. G. Kim J. Lasker C. Lidman M. Sako M. Smith M. Sullivan T. M. C. Abbott S. Allam J. Annis J. Asorey S. Avila K. Bechtol D. Brooks P. Brown D. L. Burke J. Calcino A. Carnero Rosell D. Carollo M. Carrasco Kind J. Carretero F. J. Castander T. Collett M. Crocce C. E. Cunha L. N. da Costa C. Davis J. De Vicente H. T. Diehl P. Doel A. Drlica-Wagner T. F. Eifler J. Estrada A. E. Evrard A. V. Filippenko D. A. Finley B. Flaugher R. J. Foley P. Fosalba J. Frieman L. Galbany J. Garc\'ia-Bellido E. Gaztanaga K. Glazebrook S. Gonz\'alez-Gait\'an D. Gruen R. A. Gruendl J. Gschwend G. Gutierrez W. G. Hartley D. L. Hollowood K. Honscheid J. K. Hoormann B. Hoyle D. Huterer B. Jain D. J. James T. Jeltema E. Kasai E. Krause K. Kuehn N. Kuropatkin O. Lahav G. F. Lewis T. S. Li M. Lima H. Lin M. A. G. Maia J. L. Marshall P. Martini R. Miquel P. Nugent A. Palmese Y.-C. Pan A. A. Plazas A. K. Romer A. Roodman E. Sanchez V. Scarpine R. Schindler M. Schubnell S. Serrano I. Sevilla-Noarbe R. Sharp M. Soares-Santos F. Sobreira N. E. Sommer E. Suchyta E. Swann M. E. C. Swanson G. Tarle D. Thomas R. C. Thomas B. E. Tucker S. A. Uddin V. Vikram A. R. Walker P. Wiseman
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classification astro-ph.CO
keywords distancemeasurementsladdermeasurementuncertaintiesbaosconstantcosmological
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present an improved measurement of the Hubble constant (H_0) using the 'inverse distance ladder' method, which adds the information from 207 Type Ia supernovae (SNe Ia) from the Dark Energy Survey (DES) at redshift 0.018 < z < 0.85 to existing distance measurements of 122 low redshift (z < 0.07) SNe Ia (Low-z) and measurements of Baryon Acoustic Oscillations (BAOs). Whereas traditional measurements of H_0 with SNe Ia use a distance ladder of parallax and Cepheid variable stars, the inverse distance ladder relies on absolute distance measurements from the BAOs to calibrate the intrinsic magnitude of the SNe Ia. We find H_0 = 67.8 +/- 1.3 km s-1 Mpc-1 (statistical and systematic uncertainties, 68% confidence). Our measurement makes minimal assumptions about the underlying cosmological model, and our analysis was blinded to reduce confirmation bias. We examine possible systematic uncertainties and all are below the statistical uncertainties. Our H_0 value is consistent with estimates derived from the Cosmic Microwave Background assuming a LCDM universe (Planck Collaboration et al. 2018).

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Cited by 3 Pith papers

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