In this paper we analyze previously published spectra with high signal-to-noise ratios of E and S0 galaxies in the rich cluster CL1358+62 at z = 0.33, and introduce techniques for fitting stellar population models to the data. These data and methods will be used further in a larger study of the evolution of absorption line strengths in intermediate redshift clusters. Here we focus on the 19 ell...

I provide estimates of the ultraviolet and visible light luminosity density at z 6 after accounting for the contribution from faint galaxies below the detection limit of deep HST and Spitzer surveys. I find that the rest-frame V-band luminosity density is a factor of 2Y3 below the ultraviolet luminosity density at z 6. This implies that the maximal age of the stellar population at z 6, for a Sa...

We present an analysis of optical (B −R) and optical-infrared (R −Ks) color maps for 47 extremely late-type, edge-on, unwarped, bulgeless disk galaxies spanning a wide range of mass. The color maps show that the thin disks of these galaxies are embedded within a low surface brightness red envelope. This component is substantially thicker than the thin disk (a/b ∼ 4:1, vs > 8:1), extends to at l...

We present a new database of absorption and emission-line measurements based on the entire spectral atlas from the Sloan Digital Sky Survey (SDSS) 7 data release of galaxies within a redshift of 0.2. Our work makes use of the publicly available penalized pixel-fitting (pPXF) and gas and absorption line fitting (gandalf) IDL codes, aiming to improve the existing measurements for stellar kinemati...

We presentUBV I surface photometry of a sample of low surface brightness (LSB) disk galaxies. LSB disk galaxies are fairly well described as exponential disks with no preferred value for either scale length, central surface brightness, or rotational velocity. Indeed, the distribution of scale lengths is indistinguishable from that of high surface brightness spirals, indicating that dynamically ...

We present deep Gemini GMOS optical spectroscopy of nine luminous quasars at redshifts z ∼ 0.5, drawn from the SDSS type 2 quasar sample. Our targets were selected to have high intrinsic luminosities (MV < −26 mag) as indicated by the [O III] λ5007 Å emission-line luminosity (L[O III]). Our sample has a median black hole mass of ∼ 10M⊙ inferred assuming the local MBH-σ∗ relation and a median Ed...

The stellar and dust content of spiral galaxies as function of radius has been investigated using nearinfrared and optical broadband surface photometry of 86 face-on spiral galaxies. Colors of galaxies correlate with the azimuthally averaged local surface brightness both within and among galaxies, with the lower surface brightness regions being bluer. The colors formed from different passband c...

We present a simple, physically-motivated model to interpret consistently the emission from galaxies at ultraviolet, optical and infrared wavelengths. We combine this model with a Bayesian method to obtain robust statistical constraints on key parameters describing the stellar content, star formation activity and dust content of galaxies. Our model is now publicly available via a user-friendly ...

We analyze deep X-ray, optical and mid-infrared Spitzer observations of the CDF-N/GOODS-N region to study a sample of 13 submillimeter-detected galaxies with spectroscopic redshifts (median z = 2.2). These galaxies are among the most active and massive at this epoch. We find evidence for a power-law correlation between the estimated stellar and X-ray luminosity, implying that masses of the blac...

We have discovered three globular clusters beyond the Holmberg radius in Hubble Space Telescope Advanced Camera for Surveys images of the gas-rich dark matter dominated blue compact dwarf galaxy NGC 2915. The clusters, all of which start to resolve into stars, have MV 606 = −8.9 to –9.8 mag, significantly brighter than the peak of the luminosity function of Milky Way globular clusters. Their co...