9 ½ empirical Lyα relationships

Jeff Cooke

1. UV continuum reddening, β parameter2. ISM absorption line width/strength3. Outflows and HI column density/covering fraction4. Morphology5. Luminosity 5.5 Kinematics6 Escaping ionizing photons7 Small-scale environment/interactions8 Dark matter halo mass (HOD)9 Large-scale spatial distribution (anti-correlation)9.5 Morphology - density relation

Intrinsic and extrinsic empirical Lyα relationships

9 ½ empirical Lyα relationships

aLBG eLBG1: Relationship with UV continuum slope (β parameter)

Lyα and spectral properties

Shapley+ (2003)

aLBG eLBG

Lyα and spectral properties

2: Relationship with ISM line strength1: Relationship with UV continuum slope (β parameter)

Shapley+ (2003)

aLBG eLBG

Lyα and spectral properties

Shapley+ (2003)

2: Relationship with ISM line strength3: Relationship with outflows and/or HI column density

1: Relationship with UV continuum slope (β parameter)

HST imaging ~1.5” (~10kpc)

aLBG eLBG

4: Relationship with morphology (restframe UV and optical)

Lyα and morphology

Law+ 2007, 2012a, 2012b

Cooke (2009)

aLBGs and eLBGsnaturally segregateon the CMD

eLBGs

aLBGsspectroscopicaLBGs

spectroscopic eLBGs

photometric LBGs

Steidel et al. (2003) z~3 data set: ~2,500 LBGs, ~800 spectra

Lyα and the CMD

5: Relationship with luminosity

eLBGs

aLBGsspectroscopicaLBGs

spectroscopic eLBGs

contours denotephotometric LBGs

CFHTLS Deep Fields z~3 data set: ~55,000 LBGs, ~200 Keck spectra

Cooke+ (2013)

Lyα and the CMD

5: Relationship with luminosity

Lyα and kinematics

Wiggle-z data z ~ 1.5

Disks

Dispersiondominated

5.5: Potential relationship with internal kinematicsEmily Wisnioski and the Wiggle-z team

0%

Lyα and ionizing photon escape fraction

6: Potential relationship with thefraction of escaping ionizing photons

Cooke+ (2014)

Observed fraction of ionising photons

Observed ionizing photon fraction =(< 912Å photons) / (1500Å photons)

Lyα and small-scale environment

Cooke+ (2010)

Lyα and small-scale environment

Separation (kpc)

7: Relationship with pair separation – interaction indicator

Cooke + (2010)

Lyα and environment

eLBGs

aLBGsspectroscopicaLBGs

spectroscopic eLBGs

contours denotephotometric LBGs

CFHTLS Deep Fields z~3 data set: ~55,000 LBGs, ~200 Keck spectra

Lyα and the CMD

Cooke+ (2013)

Full LBG auto-correlation

≈55,000 galaxies

* scaled to z ≈ 3

Lyα and large-scale environment

Cooke+ (2013)

aLBG auto-correlation

Lyα and large-scale environment

Cooke+ (2013)

Cooke+ (2013)

eLBG auto-correlation

Lyα and large-scale environment

8: Relationship with parent DM halo mass, HOD

a/eLBG cross-correlation

Lyα and large-scale environment

Cooke+ (2013)

Cooke, Omori, Ryan-Weber (2013)

a/eLBG cross-correlation

Lyα and large-scale environment

9: Relationship with spatial distribution Cooke+ (2013)

Lyα and large-scale environment

Cooke+ (2013)

SDSS DR7correlationfunctions

Wang, Brunner, & Dolence (2013)

(-22.5)(-21.5)(-20.5)(-19.5)

Lyα and large-scale environment

Lyα and large-scale environment

Here: radii of 2 – 4 Mpc h70-1

Lyα and large-scale environment

Here: radii of 2 – 4 Mpc h70-1

Lyα and large-scale environment

Cooke+ (2013)

Here: radii of 2 – 4 Mpc h70-1

Lyα and large-scale environment

Cooke+ (2013)

eLBGaLBG

Lyα and large-scale environment

9 ½: Potential relationship with large-scale environment i.e., the morphology-density relation at high redshift

Intrinsic and extrinsic empirical Lyα relationships

summary

1. UV continuum reddening, β parameter2. ISM absorption line width/strength3. Outflows and HI column density/covering fraction4. Morphology5. Luminosity 5.5 Kinematics6 Escaping ionizing photons7 Small-scale environment/interactions8 Dark matter halo mass (HOD)9 Large-scale spatial distribution (anti-correlation)9.5 Morphology - density relation

a/eLBG cross-correlation

Lyα and large-scale environment

Cooke+ (2013)

gLBG auto-correlation

Lyα and large-scale environment

g/eLBG cross-correlation

g/aLBG cross-correlation

Cooke+ (2013)