Observations of the missing baryons in the warm–hot intergalactic medium

Nicastro, F.; Kaastra, J. S.; Krongold, Y.; Borgani, S.; Branchini, E.; Cen, Renyue; Dadina, M.; Danforth, Charles; Elvis, M.; Fiore, F.; Gupta, Anjali; Mathur, Smita; Mayya, Y. D.; Paerels, F.; Piro, L.; Rosa‐González, D.; Schaye, Joop; Shull, J. Michael; Torres-Zafra, Juanita; Wijers, Nastasha; Zappacosta, L.

doi:10.1038/s41586-018-0204-1

Nature

2018

DOI: 10.1038/s41586-018-0204-1

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Observations of the missing baryons in the warm–hot intergalactic medium

F. Nicastro

¹

,

J. S. Kaastra

²

,

Y. Krongold

³

et al.

Abstract: It has been known for decades that the observed number of baryons in the local Universe falls about 30-40 per cent short of the total number of baryons predicted by Big Bang nucleosynthesis, as inferred from density fluctuations of the cosmic microwave background and seen during the first 2-3 billion years of the Universe in the so-called 'Lyman α forest' (a dense series of intervening H I Lyman α absorption lines in the optical spectra of background quasars). A theoretical solution to this paradox locates the… Show more

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Cited by 318 publications

(302 citation statements)

References 44 publications

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“…In Figure 3, the value of H 0 versus other key cosmological parameters is depicted for likelihood maximisations, which do not exceed χ 2 = 21, 700, to characterise their scatter. Notably, we obtain a low value for the re-ionisation redshift r re , essentially in agreement with its extraction in detecting the Gunn-Peterson trough in high-redshift quasar spectra [34], a low value of the baryon density which deviates by about 30% from the Big-Bang-nucleosynthesis (BBN) deuterium concordance value but matches the value of typical baryon censuses [55] (see [56], however, for an apparent, alternative resolution of the missing-baryon problem, and a best-fit value of H 0 coincident with the most recent and most precise SNe Ia distance-redshift extraction that is based on a locally calibrated cosmological distance ladder (and not on the high-z calibration of an inverted distance ladder [33,57])). Notice the low value of n s , demanding a red-tilted spectrum of primordial, adiabatic curvature perturbations.…”

Section: Results On Tt Te and Eesupporting

confidence: 85%

SU(2) Quantum Yang–Mills Thermodynamics: Some Theory and Some Applications

Hofmann

¹

2018

Universe

0

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Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

“…In Figure 3, the value of H 0 versus other key cosmological parameters is depicted for likelihood maximisations, which do not exceed χ 2 = 21, 700, to characterise their scatter. Notably, we obtain a low value for the re-ionisation redshift r re , essentially in agreement with its extraction in detecting the Gunn-Peterson trough in high-redshift quasar spectra [34], a low value of the baryon density which deviates by about 30% from the Big-Bang-nucleosynthesis (BBN) deuterium concordance value but matches the value of typical baryon censuses [55] (see [56], however, for an apparent, alternative resolution of the missing-baryon problem, and a best-fit value of H 0 coincident with the most recent and most precise SNe Ia distance-redshift extraction that is based on a locally calibrated cosmological distance ladder (and not on the high-z calibration of an inverted distance ladder [33,57])). Notice the low value of n s , demanding a red-tilted spectrum of primordial, adiabatic curvature perturbations.…”

Section: Results On Tt Te and Eesupporting

confidence: 85%

SU(2) Quantum Yang–Mills Thermodynamics: Some Theory and Some Applications

Hofmann

¹

2018

Universe

0

Get access via publisher Add to collection Cite

Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

“…3 the value of H 0 versus other key cosmological parameters is depicted for likelihood maximisations, which do not exceed χ 2 = 21700, to characterise their scatter. Notably, we obtain a low value for the re-ionisation redshift r re , essentially in agreement with its extraction in detecting the Gunn-Peterson trough in high-redshift quasar spectra [27], a low value of the baryon density which deviates by about 30% from the BBN deuterium concordance value but matches the value of typical baryon censuses [47], see [48], however, for an apparent, alternative resolution of the missing-baryon problem, and a best-fit value of H 0 coincident with the most recent and most precise SNe Ia distanceredshift extraction [26]. Notice the low value of n s , demanding a red-tilted spectrum of primordial, adiabatic curvature perturbations.…”

Section: Results On Tt Te and Eesupporting

confidence: 84%

SU(2) Quantum Yang-Mills Thermodynamics: Some Theory and Some Applications

Hofmann

¹

2018

Preprint

0

Get access via publisher Add to collection Cite

Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

“…As the baryon mass fraction in filaments cannot be completely recovered by X-ray emitting gas (Eckert et al 2015), and as we set upper limits on most other diagnostics of cooler gas, we expect that there may still be a component of WHIM traced by O VI absorption, which is inaccessible to COS at this redshift. This aligns with other recent works (e.g., Tejos et al 2016;Nicastro et al 2018; but see also Johnson et al 2019)…”

Section: Fully Heated Filamentssupporting

confidence: 93%

COS Observations of the Cosmic Web: A Search for the Cooler Components of a Hot, X-Ray Identified Filament

Connor,

Zahedy,

Chen

et al. 2019

ApJL

Get access via publisher Add to collection Cite

Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

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