IGM2018: Revealing Cosmology and Reionization History with the Intergalactic Medium

18 Sept 2018, 09:00 → 21 Sept 2018, 18:30 Asia/Tokyo

Kavli IPMU, Kashiwa, Japan

Overview: As the dominant reservoir of baryons in the Universe, the intergalactic medium (IGM) plays a crucial role in the history and evolution of cosmic structure. The stars and black holes in the first galaxies emitted copious amounts of ionizing radiation, singly ionizing hydrogen and helium at z~10, and later doubly ionizing Helium at z~3, thus reheating and reionizing the cosmos. The IGM evolves into the clumpy cosmic web, which is the source of gas that cools and accretes onto galaxies powering star-formation, and a sink for the metal enriched material, energy, and radiation which galaxies eject. The complex interplay of these processes determines the physical state of the intergalactic gas over cosmic time. Observations of absorption lines in quasar and galaxy spectra from the present until redshift 7 provide a thermal and chemical record of the IGM, enable precision measurements of density fluctuations and the geometry of the early Universe, and provide invaluable insights into the physical processes shaping galaxy formation. In the next few years, advances in telescope instrumentation, the emergence of massive spectroscopic surveys, as well as developments in theory and computation will deepen our understanding of the IGM as a probe of cosmology and the cosmic reionization events. This conference aims to bring together both theorists and observers working on the various astronomical passbands to discuss the latest developments in this exciting field.

Dates: September 18th - 21st, 2018

Deadlines: Abstract submission is now closed. You may still register to attend the meeting until September 1st, 2018.

Venue: Kavli IPMU, Kashiwa, Japan

Organizers: Khee-Gan Lee (Kavli IPMU), Nao Suzuki (Kavli IPMU)

Scientific Organizing Committee:

Piero Madau (UCSC)	Valentina D'Odorico (INAF/OATS)
Matt McQuinn (Washington)	Raghunathan Srianand (IUCAA)
Nathalie Palanque-Delabrouille (CEA Saclay)	Martin Haehnelt (Cambridge)
Joe Hennawi (UCSB)

Confirmed Speakers: 

Benedetta Ciardi (MPA)	Daniel Stark (Arizona)	Andreu Font-Ribera (UCL)
Andrei Mesinger (SNS)	Laura Keating (CITA)	Matteo Viel (INAF-OATS)
Andrea Ferrara (SNS)	Masami Ouchi (Tokyo)	Chen Heinrich (JPL)
Emma Ryan-Weber (Swinburne)	Naoki Yoshida (Kavli IPMU)	Michael Walther (UCSB)
Fred Davies (UCSB)	Christina Eilers (MPIA)	George Becker (UC Riverside)
Christophe Yèche (CEA Saclay)	Raul Monsalve (Colorado/McGill)

Address:

Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU), the University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa City, Chiba 277-8583, Japan

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Tuesday 18 September

Introduction by Deputy Director Misao Sasaki: Preliminaries

1 Ciardi (30 mins): The heating and ionization of the IGM: theoretical modeling and observational probes (Session Chair: Haehnelt)

Slides

2 D'Aloisio (15 mins): How hot does the IGM get during reionization?

3 Mesinger (20 mins): Modeling reionization observables

Slides

10:40 Coffee Break

4 Heinrich (20 mins): Complete reionization constraints from Planck data

Slides

5 Trac (15 mins): Simulations and Constructions of the Reionization of Cosmic Hydrogen

Slides

6 Mao (15 mins): Antisymmetric cross power spectrum as a new probe of cosmic reionization

Slides

7 Lightning Talks I: Tanaka, Karkare, Aoyama, Ewall-Wice

12:25 Lunch

8 Stark (30 mins): Deep Spectroscopy of Lyman-alpha Emitters in the Reionization Era (Session Chair: Prochaska)

9 Bunker (15 mins): Exploring the IGM and Reionization with JWST

Slides

10 Ouchi (20 mins): Subaru Hyper Suprime-Cam Survey for High Redshift Galaxies: Interplay between Galaxies and IGM

Slides

11 Harikane (15 mins): Census of Lya, [OIII]5007, Ha, and [CII]158um Line Emission with ~1000 LAEs at z=4.9-7.0 Revealed with Subaru/HSC

Slides

12 Paulino-Afonso (15 mins): The end of the reionisation: what are the most luminous Lyman-a emitters telling us?

The end of the reionisation: what are the most luminous Lyman-a emitters telling us?

13 Poster Presentations

15:35 Coffee Break

14 Walther (20 mins): New measurements of thermal evolution in the IGM based on absorption line analyses

Slides

15 Boera (15 mins): The impact of Reionization on the IGM thermal history: present and future constraints

Slides

16 Hiss (15 mins): A New Statistical Method for Measuring the Temperature-Density Relation in the IGM using the b-N Distribution

Slides

17 Worseck (15 mins): Constraints on the High-Redshift Quasar Population from Ongoing HeII Reionization at z~4

Slides

18 Khrykin (15 mins): The He II proximity effect at z~4: evidence for short quasar lifetime

Slides

Wednesday 19 September

19 D'Odorico (30 mins): Constraints on reionization and the first sources from quasar absorption spectra (Session Chair: Ryan-Weber)

Slides

20 Fan (15 mins): New Surveys of Luminous z~7 Quasars: Mapping Reionization History

21 Davies (20 mins): Measuring the Reionization History with Quasar Damping Wings

Slides

22 Keating (20 mins): The IGM at the end of reionization

Slides

10:45 Coffee Break

23 Lee (20 mins): Mapping the z~2 Cosmic Web with IGM Tomography

Lee

24 Nagamine (15 mins): Subaru PFS survey and IGM tomography using Cosmological Hydrodynamic Simulations

Slides

25 Schmidt (15 mins): Mapping quasar light echos in three dimensions with Lya forest tomography

Slides

26 Maitra (15 mins): Three point correlation of the IGM

12:30 Lunch

27 Srianand (20 mins): Influence of ionising UV Background on the inferred properties of metals in the IGM (Session Chair: Yoshida)

28 Haardt (15 mins): The cosmic ultraviolet background then and now

Slides

29 Upton Sanderbeck (15 mins): The impact of ultraviolet background fluctuations on galaxy clustering measurements

Slides

30 Bose (15 mins): How the present-day distribution of dwarf galaxies encodes the physics of reionisation

Slides

15:10 Coffee Break

15:30 Self-Organized Excursion to Asakusa

18:30 Conference Dinner on "Amitatsu" Banquet Boat

Departing from Asakusa pier

Thursday 20 September

31 Haehnelt (30 mins): The emergence of structure during the epoch of reionization (Session Chair: Miralda-Escude)

Slides

32 Yoshida (20 mins): Structure formation in the early universe

Slides

33 McQuinn (20 mins): The perturbation theory of everything (IGM)

Slides

11:10 Coffee Break

34 Monsalve (20 mins): An Absorption Profile in the Sky-Averaged Radio Spectrum

35 Parsons (15 mins): Prospects for Mapping the z~10 IGM with HERA

36 Kern (15 mins): Early Data Analysis and Power Spectrum Efforts from HERA

37 Fialkov (15 mins): Illuminating Dark Ages

12:55 Lunch

38 Ross (15 mins): Simulating the 21-cm signal from the Cosmic Dawn (Session Chair: McQuinn)

Slides

39 Dixon (15 mins): Reionization on the large scales

40 Katz (15 mins): The Sphinx Simulations: The Impact of Inhomogeneous Reionization on the IGM and Galaxy Formation

41 Lightning Talks II: Balashev, Laursen, Suzuki, Liang, Fagnoni

15:30 Coffee Break

42 Font-Ribera (30 mins): Studying the Expansion of the Universe with quasar spectra (Session Chair: McQuinn)

Slides

43 Yeche (20 mins): Neutrino masses and cosmology with Lyman-alpha forest power spectrum

Slides

44 Palanque-Delabrouille (20 mins): Sterile neutrinos in cosmology

Slides

45 Lightning Talks III: Rogers, Pedersen, Prochaska, Meyer, Shimabukuro

Friday 21 September

46 Tonnesen (15 mins): Probing the Dependence of the Intergalactic Medium on Large-scale Environment Using the Low-redshift Lyα Forest (Session Chair: D'Odorico)

Slides

47 Lukic (15 mins): WHIM in hydrodynamical simulations

48 Kooistra (15 mins): Probing the neutral IGM in filaments with SKA

Slides

49 Ando (15 mins): Redshift space distortion of 21cm line with cosmological hydrodynamic simulations

Slides

50 Saliwanchik (15 mins): Mapping BAO with the HIRAX Radio Array

Slides

10:40 Coffee Break

51 Becker (20 mins): Connecting IGM Opacity Fluctuations to Galaxies Near Reionization

Slides

52 Rauch (15 mins): Probing the Nature of Low Density Regions in the High Z IGM

53 Ding (15 mins): A new measurement on the effective optical depth of Lyman Series

Slides

54 Eilers (20 mins): The Intergalactic Medium at High Redshift and its Implications on the Epoch of Reionization

Slides

12:30 Lunch

55 Viel (20 mins): Intergalactic Medium constraints on dark matter properties (Session Chair: Palanque-Delabrouille)

Slides

56 Garzilli (15 mins): Lyman-alpha revisited: baryonic effects versus warm dark matter

Slides

57 Bird (15 mins):Is It Time to Stop Rescaling Spectra to Match the Observed Mean Flux?

Slides

58 Ryan-Weber (20 mins): Galaxies, Intergalactic and Circumgalatic Carbon at redshifts 4 to 6

Slides

15:15 Coffee Break

59 Miralda-Escudé (15 mins): Host halo masses of damped lyman alpha systems as a function of metal line strength (Session Chair: Hennawi)

Slides

60 Rafelski (15 mins): Evolution of the metallicity, incidence rate, and hydrogen mass density of damped Lyman-alpha systems out to z~5

Slides

61 Lan (15 mins): Metallicity and morphology of the circumgalactic medium

62 Conference Summary by Piero Madau (45 mins)