Lyman Alpha as an Astrophysical Tool

2 Sept 2013, 09:00 → 27 Sept 2013, 18:00 Europe/Stockholm

132:028 (Nordita, Stockholm)

Garrelt Mellema (Stockholm University, OKC), Göran Östlin (Stockholm University, OKC), Matthew Hayes (IRAP)

Venue

Nordita, Stockholm, Sweden

Scope

This program is about the Ly α transition in Hydrogen and its astrophysical applications. Young stellar populations are dominated by massive, hot and short-lived stars that ionize their surroundings. Hydrogen recombination lines reprocess the ionizing radiation and are therefore ubiquitously strong in star forming regions. The intrinsically strongest line is Ly α (following the transition from the first excited state to the ground state) and with a rest wavelength in the far Ultra Violet it has become the most used spectral probe of the distant universe, and is used to assemble large samples of high redshift galaxies. However, the line is a resonant one and the absorption cross section in neutral Hydrogen is high, meaning that Ly α photons have a tendency to scatter in the interstellar medium in galaxies. Ly α is hence a powerful, but complicated, probe of star forming and high redshift galaxies. This programs aims to bring together experts in modeling Ly α radiative transfer and galaxy formation, and observations of Ly α in local galaxies and the distant universe.

During the second week of the program, 9-13 September 2013, there will be a workshop.

[Timetable]

[Slides from talks]

Further information

You can find more information about this program and the workshop 9-13 September on the home page of the Astronomy Department at Stockholm University.

Application

If you want to apply for participation in the program, please fill in the application form.

You should use this application form both if you intend to participate in the program 2-6 and 16-27 September as well as if you will only be attending the workshop 9-13 September.

You will be informed by the organizers shortly after the application deadline whether your application has been approved. Due to space restrictions, the total number of participants is strictly limited. (Invited speakers are of course automatically approved, but need to register anyway.)

Application deadline: 14 July 2013

A minimum stay of one working week is required and we encourage participants to stay for a period of at least two weeks.

Sponsored by:

Monday 2 September

1 TBA

Speaker: Aliana Henry (NASA Goddard Space Flight Center)

Wednesday 4 September

2 TBA

Speaker: Sebastiano Cantalupo (UCSC)

3 Discussion

Speakers: Moire Prescott (Dark Cosmology Centre), Peter Laursen

Thursday 5 September

4 TBA

5 What is responsible for the rapid evolution in the properties of the Lyman-alpha emitting galaxies between redshifts z~0 to z~2-3?

Speakers: Ester Hu (University of Hawaii), Len Cowie (University of Hawaii)

Friday 6 September

6 TBA

7 Discussion

Speakers: Claudia Scarlata (University of Minnesota), Sebastiano Cantalupo (UCSC)

Monday 9 September

8 Introduction and welcome speech, information and practical issues

Speaker: Göran Östlin

9 Illuminating the dark Universe with quasar-induced Ly-a emission

Speaker: Sebastiano Cantalupo (UCSC)

10 Lighting Up Damped Lyman Alpha Absorption Systems

Speaker: Luke Barnes

11 The formation of individual galactic halos as highlighted by Ly-a emission

Speaker: Michael Rauch (Carnegie Observatories)

12 CGM modeling and Ly-alpha halos

Speaker: Mark Djikstra

13 Lighting up the IGM: Fluorescent emitters around z~2.7 QSOs

Speaker: Ryan Trainor

14 On the observability of cold accretion streams via their (polarized) Ly-a emission

Speaker: Jeremy Blaizot

15 Galaxies, gas flows, and enrichment within giant Ly-a nebulae

Speaker: Moire Prescott (Dark Cosmology Centre)

16 Polarized extended Ly-a emission from a z = 2.3 radio galaxy

Speaker: Andrew Humphrey

17 First volume-limited search for oxygen-line blobs at high redshift

Speaker: Suraphong Yuma

18 Shedding (Ly-a) light on the circum-galactic and intergalactic media

Speaker: Zhenya Zheng

Tuesday 10 September

19 IGM/CGM emission -- A new window on galaxy formation and evolution

Speaker: Christopher Martin

20 Ly-a Emitters: probing cosmic dawn

Speaker: Pratika Dayal

21 Large-scale structure from Ly-a emitters at 2 < z < 4.5

Speaker: Maria del Pilar Bonilla-Tobar

22 Dynamical masses and scaling relations of Ly-a galaxies

Speaker: James Rhoads

23 Present-day descendants of z=3 Ly-a emitting galaxies in the Millennium-II halo merger trees

Speaker: Nelson Padilla

24 Evolution of Ly-a emitting galaxies: Insights from a flux-limited GALEX sample at z~1

Speaker: Isak Wold

25 Ly-alpha as an astrophysical tool to trace the most massive structures in the Universe

Speaker: Alvaro Orsi

26 Evolution of diffuse Ly-a halos around star-forming galaxies at z=2-7

Speaker: Rieko Momose

Wednesday 11 September

27 The Lyman Alpha Reference Sample - LARS and eLARS

Speaker: Göran Östlin

28 The Lyman Alpha Reference Sample: HST Ly-a imaging and extended neutral gas

Speaker: Matthew Hayes

29 Direct HI Masses of the Lyman Alpha Reference Sample galaxies

Speaker: Stephen Pardy

30 Ly-a properties of simulated galaxies

Speaker: Anne Verhamme

31 Interpretation of Ly-a line profiles in the LARS sample of nearby galaxies

Speaker: Ivana Ortilova

32 Lyman alpha Reference Sample for high-z studies

Speaker: Lucia Guaita

33 Ly-a emission in dust-rich starburst galaxies

Speaker: J. Miguel Mas-Hesse

34 ISM effect on Ly-a line profile and application to nearby Universe galaxies

Speaker: F. Duval

35 LINERS and Lyman continuum photon escape

Speaker: Polychronis Papaderos

36 Lya emission as a probe of feedback and physical conditions in low mass galaxies at z~2-3

Speaker: Dawn Erb

37 Detailed modelling of the CGM of high redshift Ly-a emitters

Speaker: Andrew Chung

38 Ly-a radiation mechanism of Ly-a emitters and its implications for re-ionization

Speaker: Takuya Hashimoto

39 A statistical study on galactic outflows of Ly-a emitters probed by velocity offsets between their Ly-a/UV absorption and nebular lines

Speaker: Takatoshi Shibuya

40 ISM dynamics and geometry in LARS galaxies

Speaker: Thøger Emil Rivera-Thorsen

41 Detailed modeling of observed Ly-a lines

Speaker: Peter Laursen

42 Ly-a Escape from z~0.03 star-forming galaxies: the dominant role of outflows

Speaker: Aida Wofford

43 High resolution Ly-a profiles from COS spectroscopy

Speaker: Claudia Scarlata

44 Anisotropic emission and inclination effect in LAEs

Speaker: Christoph Behrens

45 Discussion

Thursday 12 September

46 On the rapid demise of Ly-a emitters at redshift z>7 due to the increasing incidence of optically thick absorption systems

Speaker: Martin Haehnelt

47 Re-ionization topology and global HI fraction from LAE survey: bubble- or web-dominated topology?

Speaker: Koki Kakiichi

48 Re-ionization constraints using high-z galaxies

Speaker: Anne Hutter

49 Ly-a at z>7: Constraints on the neutral fraction of Hydrogen

Speaker: Joseph Caruana

50 Lyman-break galaxies in the Epoch of Re-ionization

Speaker: Silvio Lorenzoni

51 Contaminants of samples of LAE candidates at z~7.7

Speaker: Aurelie Penin

52 The imprint of inhomogeneous re-ionization on the Ly-a line

Speaker: Andrei Mesinger

53 Completing the census of faint Ly-a galaxies in the epoch of reionization

Speaker: Aliana Henry (NASA Goddard Space Flight Center)

54 Cosmic Re-ionization history probed by Ly-a luminosity function of LAEs at z=7.3

Speaker: Akira Konno

55 Exploring the Epoch of Reionization by ALMA, HST, and Subaru/Hyper Suprime-Cam Surveys

Speaker: Masami Ouchi

56 What do Ly-a emitters tell us about re-ionization?

Speaker: Hannes Jensen

57 The cool side of the Lyman Alpha Emitters

Speaker: Andrea Ferrara

58 Present-day descendants of z=3 Ly-a emitting galaxies in the Millennium-II halo merger trees

Speaker: Nelson Padilla

59 First spectroscopic evidence for high ionization state and low oxygen abundance in Ly-a emitters

Speaker: Kimihiko Nakajima

60 Metallicity in LAEs: the dominant selection factor?

Speaker: Len Cowie

61 What really matters for Ly-a escape

Speaker: Hakim Atek

62 Spectral Energy Distribution Fitting and the Fundamental Metallicity Relation of LAEs

Speaker: Alex Hagen

63 Ly-a+He-II emitters in VIMOS Deep and Ultra-Deep surveys

Speaker: P. Cassata

64 Spontaneous Discussion

Friday 13 September

65 Cosmic variance in the physical properties of Ly-a emitting galaxies at 2 < z < 3

Speaker: Caryl Gronwall

66 Trident: A three-pronged galaxy survey at z~2

Speaker: A Sandberg

67 The Ly-a equivalent width distribution at z ~ 4.5

Speakers: James Rhoads, Zhenya Zheng

68 The evolution of Ly-a line shapes and equivalent widths at high redshift

Speaker: Ester Hu (University of Hawaii)

69 Deep ALMA observations of far-infrared continuum emission from star-forming galaxies at high Redshift

Speaker: Yoshiaki Ono

70 Ly-a emission from GRB host galaxies

Speaker: Bo Milvang-Jensen

71 New frontiers in LAE science with MUSE

Speaker: Edmund Herenz

72 Physical insight from Ly-a on the properties of high-z star-forming galaxies

Speaker: Daniel Schaerer

73 Final remarks

Monday 16 September

74 TBA

Speaker: Ryan Trainor

75 Epoch of Reionization: ALMA, HST, and Subaru/Hyper Suprime-Cam Survey

Speaker: Masami Ouchi

Tuesday 17 September

76 TBA

Speaker: Claudia Scarlata (University of Minnesota)

77 Discussion

Wednesday 18 September

78 TBA

79 TBA

Speaker: Caryl Gronwall (Penn State University)

Thursday 19 September

80 TBA

Speaker: Moire Prescott (Dark Cosmology Centre)

81 TBA

Speaker: Anne Verhamme

Friday 20 September

82 (1) delta_v_Lya and delta_v_abs in LAEs at z~2 to discuss their neutral hydrogen column density (2) small delta_v_Lya in LAEs at z~2 and its implication for the reionization study

Speakers: Rieko Momose, Takuya Hashimoto

83 Big Discussion

Wednesday 25 September

84 Discussion

Thursday 26 September

85 Discussion