The MegaMapper: A Stage-5 Spectroscopic Instrument Concept for the Study of Inflation and Dark Energy

Schlegel, David J.; Kollmeier, Juna A.; Aldering, G.; Bailey, S.; Baltay, C.; Bebek, C.; BenZvi, S.; Besuner, Robert; Blanc, Guillermo A.; Bolton, A.; Bonaca, Ana; Bouri, Mohamed; Brooks, David J.; Buckley-Geer, E.; Cai, Zheng; Crane, Jeffrey D.; Démina, R.; DeRose, Joseph J.; Dey, Arjun; Doel, P.; Fan, Xiaohui; Ferraro, Simone; Finkbeiner, Douglas P.; Font-Ribera, Andreu; Gontcho, Satya Gontcho A; Green, Daniel; Gutiérrez, G.; Guy, J.; Heetderks, H.; Huterer, Dragan; Infante, L.; Jelinsky, Patrick; Karagiannis, Dionysios; Kent, Stephen M.; Kim, Alex; Kneib, Jean-Paul; Kremin, Anthony; Kronig, Luzius; Konidaris, Nick; Lahav, O.; Lampton, M.; Landriau, Martin; Lang, Dustin; Leauthaud, Alexie; Levi, Michael; Linder, Eric V.; Magneville, C.; Martini, Paul; Mateo, Mario; McDonald, Patrick; Miller, Christopher J.; Moustakas, John; Myers, Adam D.; Mulchaey, John S.; Newman, Jeffrey A.; Nugent, P.; Padmanabhan, Nikhil; Palanque-Delabrouille, N.; Piro, Anthony L.; Poppett, Claire; Prochaska, J. X.; Pullen, Anthony R.; Rabinowitz, D.; Raichoor, Anand; Ramírez, Solange; Rix, Hans─Walter; Ross, Ashley J.; Samushia, Lado; Schaan, Emmanuel; Schubnell, M.; Seljak, Uroš; Seo, Hee-Jong; Shectman, Stephen; Schlafly, Edward F.; Silber, Joseph; Simon, Joshua D.; Slepian, Zachary; Slosar, Anže; Soares-Santos, M.; Tarlè, G.; Thompson, Ian M.; Valluri, Monica; White, Martin; Wilson, M. J.; Yèche, Christophe; Zaritsky, Dennis; Zhou, Rongpu

doi:10.2172/1887264

Cited by 13 publications

(17 citation statements)

References 30 publications

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“…One can of course obtain tighter constraints in both cases by adopting a specific functional form for the deviation behavior, but given the uncertainty about the dark matter sector we prefer the model independent approach. Future surveys to even higher redshift, such as MegaMapper [28] or Spec-S5 [29], could also improve constraints, adding to their science cases for dark energy [30,31]. Further dark matter properties such as its (nonadiabatic) sound speed and viscous sound speed could be constrained in a similar model independent manner; we leave this for future work.…”

Section: Discussionmentioning

confidence: 99%

Model independent dark matter properties from cosmic growth

Zhumabek,

Denissenya,

Linder

2024

J. Cosmol. Astropart. Phys.

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Dark matter dominates the matter budget of the universe but its nature is unknown. Deviations from the standard model, where dark matter clusters with the same gravitational strength as baryons, and has the same pressureless equation of state as baryons, can be tested by cosmic growth measurements. We take a model independent approach, allowing deviations in bins of redshift, and compute the constraints enabled by ongoing cosmic structure surveys through redshift space distortions and peculiar velocities. These can produce constraints at the 3-14% level in four independent redshift bins over z = [0,4].

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Section: Discussionmentioning

confidence: 99%

Model independent dark matter properties from cosmic growth

Zhumabek,

Denissenya,

Linder

2024

J. Cosmol. Astropart. Phys.

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“…We conclude that forthcoming data from ongoing and upcoming large-scale structure surveys [65,[82][83][84][85][86] will dramatically expand the redshift coverage and increase the precision 2. In the second step, we then choose to exclude cosmological models -specified by the above cosmological parameters and EFT parameters -that are disfavored by current data at ≥ 5σ.…”

Section: Discussionmentioning

confidence: 99%

Sweeping Horndeski canvas: new growth-rate parameterization for modified-gravity theories

Wen,

Nguyen,

Huterer

2023

J. Cosmol. Astropart. Phys.

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We propose and numerically validate a new fitting formula that is sufficiently accurate to model the growth of structure in Horndeski theories of modified gravity for upcoming Stage IV and V large-scale structure surveys. Based on an analysis of more than 18,000 Horndeski models and adopting the popular parameterization of the growth rate f(z) = Ω M (z) γ , we generalize the constant growth index γ to a two-parameter redshift-dependent quantity, γ(z), that more accurately fits these models. We demonstrate that the functional form γ(z) = γ 0 + γ 0 z 2/(1 + z) improves the median χ 2 of the fit to viable Horndeski models by a factor of ∼ 40 relative to that of a constant γ, and is sufficient to obtain unbiased results even for precise measurements expected in Stage IV and V surveys. Finally, we constrain the parameters of the new fitting formula using current cosmological data.

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“…This universality of cosmological constraints is one of the reasons why the search for light thermal relics has been adopted as one of the main science targets of future cosmological surveys (see e.g. [68,69]), such as the next-generation CMB and LSS experiments CMB-S4 [56,70,71] and Spec-S5 [72,73], respectively. In the next section, we will provide a few explicit examples for the constraining power of cosmology to light thermal relics.…”

Section: The Power Of Cosmology (And Astrophysics)mentioning

confidence: 99%

“…from Planck 2018 and BAO data [79], and the anticipated sensitivity of the Simons Observatory (SO) [80] and CMB-S4 [70,71] as examples for upcoming and next-generation CMB experiments are included with dashed lines. The horizontal gray band illustrates the future sensitivity that might potentially be achieved with a combination of cosmological surveys of the CMB and LSS, such as CMB-HD [81], Spec-S5 [73] and PUMA [82], cf. [57,83,84].…”

Section: Cosmological Constraints On Relic Axionsmentioning

confidence: 99%

Feebly-interacting particles: FIPs 2020 workshop report

et al. 2021

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With the establishment and maturation of the experimental programs searching for new physics with sizeable couplings at the LHC, there is an increasing interest in the broader particle and astrophysics community for exploring the physics of light and feebly-interacting particles as a paradigm complementary to a New Physics sector at the TeV scale and beyond. FIPs 2020 has been the first workshop fully dedicated to the physics of feebly-interacting particles and was held virtually from 31 August to 4 September 2020. The workshop has gathered together experts from collider, beam dump, fixed target experiments, as well as from astrophysics, axions/ALPs searches, current/future neutrino experiments, and dark matter direct detection communities to discuss progress in experimental searches and underlying theory models for FIPs physics, and to enhance the cross-fertilisation across different fields. FIPs 2020 has been complemented by the topical workshop “Physics Beyond Colliders meets theory”, held at CERN from 7 June to 9 June 2020. This document presents the summary of the talks presented at the workshops and the outcome of the subsequent discussions held immediately after. It aims to provide a clear picture of this blooming field and proposes a few recommendations for the next round of experimental results.

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The MegaMapper: A Stage-5 Spectroscopic Instrument Concept for the Study of Inflation and Dark Energy

Cited by 13 publications

References 30 publications

Model independent dark matter properties from cosmic growth

Model independent dark matter properties from cosmic growth

Sweeping Horndeski canvas: new growth-rate parameterization for modified-gravity theories

Feebly-interacting particles: FIPs 2020 workshop report

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