9 ½ empirical Lyα relationships
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Transcript of 9 ½ empirical Lyα relationships
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)