Day 52

Friday.  On my way from Seoul to Busan on KTX.



1107.4631
A more general model for the intrinsic scatter in SNIa distance moduli
Marriner, Bernstein, Kessler, Lampeitl, Miquel, Mosher, Nichol, Sako, Schneider, Smith


* SALT2 model parameters alpha and beta


Better way to determine the aforementioned parameters, using covariance matrix instead of a single parameter to describe the intrinsic scatters.  Beta is larger, and the uncertainty larger than conventional method (of course).  Beta: value expected for extinction by the type of dust found in the MW.   Modeling the distribution of SNIa in color show strong evidence that variation in color is a significant contributor to the scatter of SNIa around their standard candle magnitude.


1107.5060
Physical properties of galaxies from z=2-4
Shapley


Census of the method used to find distant galaxies and the empirical constraints on their multiwave length luminosities and colors; review high-z galaxy stellar content, SF history; interstellar contents (dust, gas, heavy elements); structural and dynamical properties.  Conclude by listing some of the most pressing and open questions regarding the physics of high-z galaxies.


* what are the most pressing and open questions of high-z galaxies???


1107.5045
Too small to succeed?  Lighting up massive dark matter subaloes of the MW
Di Cintio, Knebe, Libeskind, Yepes, Gottloeber, Hoffman


Simulation of the Local Group (using CLUES--Constrained local universe simulations): used to investigate the recently highlighted problem of the most massive dark subhalos of MW too dense to host bright satellites.  Baryonic processes leave a twofold effect on the relation between the peak of the rotation curve, and its position (Vmax and Rmax).  Those with large baryon fraction undergo baryonic contraction, decreasing in Rmax while Vmax unchanged.  Those with smaller baryion fraction undergo decrease in Vmax (possibly due to outflow of material).  Problem cannot be solved by simply investigating baryonic processes.


* Does CLUES simulate gas and DM separately?  It must.  That info should be in the abstract.
* not sure what the point was the abstract was.



1107.5256
Extreme emission line galaxies in CANDELS: Broad-band selected, star-bursting dwarf galaxies at z>1
van der Wel et al


* EELG: extreme emission line galaxies -- my guess is that these are typically vigorously star-forming galaxies w/o much dust.  I could be wrong.
* CANDELS: Cosmic assembly near-IR deep extragalactic legacy survey


Found a bunch (69 candidates) of EELG at z=1.6-1.8 in CANDELS, rest-frame equivalent widths of 1000A.  These are dwarf galaxies with 10e8 Msun stellar mass, undergoing enormous starburst phase (15My\
r).  Burst may cause outflows strong enough to produce cored DM profiles in low-mass galaxies.  Such galaxies have SFR and comoving number density (3.7e-4 Mpc^{-3}) that can, in ~4Gyr, produce much of the stellar mass density that is presently contained in 10e8-10e9 Msun dwarf galaxies.  Strong indication that many or even most of the stars in present-day dwarf galaxies formed in strong, short-lived bursts, mostly at z>1.


* The last conclusion seem to be bit of a jump.