Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR2.6k papers
- University of California, BerkeleyUS2.5k papers
- The Ohio State UniversityUS2.3k papers
- University of ArizonaUS2.1k papers
- Lawrence Berkeley National LaboratoryUS2.1k papers
- SLAC National Accelerator LaboratoryUS2k papers
- University of California, IrvineUS2k papers
- Yale UniversityUS1.9k papers
- University of Wisconsin–MadisonUS1.9k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR1.9k papers
- McGill UniversityCA1.9k papers
- University of ChicagoUS1.9k papers
27 papers · 2 filters
Evolution of Broad-line Emission from Active Galactic Nuclei
Moshe Elitzur, Luis C. Ho, Jonathan R. Trump
Apart from viewing-dependent obscuration, intrinsic broad-line emission from active galactic nuclei (AGNs) follows an evolutionary sequence: Type …
Discovery of a transparent sightline at ρ < 20 kpc from an interacting pair of galaxies
Sean D. Johnson, Hsiao-Wen Chen, John S. Mulchaey +3
We report the discovery of a transparent sightline at projected distances of ρ < 20 kpc to an interacting pair of mature galaxies at z = 0.12. The sightline of the UV-bright quasar…
Formation of Molecular Clouds and Global Conditions for Star Formation
Clare L. Dobbs, Mark R. Krumholz, Javier Ballesteros-Paredes +6
Giant molecular clouds (GMCs) are the primary reservoirs of cold, star-forming molecular gas in the Milky Way and similar galaxies, and thus any understanding of star formation mus…
The Pressure of the Star Forming ISM in Cosmological Simulations
Ferah Munshi, Charlotte Christensen, Thomas R. Quinn +4
We examine the pressure of the star-forming interstellar medium (ISM) of Milky-Way sized disk galaxies using fully cosmological SPH+N-body, high resolution simulations. These simul…
A Deep Search for Faint Galaxies Associated with Very Low-Redshift C IV Absorbers: A Case with Cold-Accretion Characteristics
Joseph N. Burchett, Todd M. Tripp, Jessica K. Werk +4
Studies of QSO absorber-galaxy connections are often hindered by inadequate information on whether faint/dwarf galaxies are located near the QSO sight lines. To investigate the con…
Galaxy Formation with local photoionisation feedback I. Methods
R. Kannan, G. S. Stinson, A. V. Macciò +8
We present a first study of the effect of local photoionising radiation on gas cooling in smoothed particle hydrodynamics simulations of galaxy formation. We explore the combined e…
The Pattern of CN, O, and Na Inhomogeneities on the Red Giant Branch of Messier 5
Graeme H. Smith, Payal N. Modi, Katherine M. Hamren
Data from the literature are used to explore the relation between 3883 CN band strength and the sodium and oxygen abundances of red giants in the globular cluster Messier 5. Alt…
A New Approach to Detailed Structural Decomposition: Kicked-up Disk Stars in Andromeda's Halo?
Claire E. Dorman, Lawrence M. Widrow, Puragra Guhathakurta +1
We characterize the bulge, disk, and halo subcomponents in the Andromeda galaxy (M31) over the radial range 0.4 < R < 225 kpc. The cospatial nature of these subcomponents renders t…
The Universal Stellar Mass-Stellar Metallicity Relation for Dwarf Galaxies
Evan N. Kirby, Judith G. Cohen, Puragra Guhathakurta +3
We present spectroscopic metallicities of individual stars in seven gas-rich dwarf irregular galaxies (dIrrs), and we show that dIrrs obey the same mass-metallicity relation as the…
A New Approach to Detailed Structural Decomposition from the SPLASH and PHAT Surveys: Kicked-up Disk Stars in the Andromeda Galaxy?
Claire E. Dorman, Lawrence M. Widrow, Puragra Guhathakurta +7
We characterize the bulge, disk, and halo subcomponents in the Andromeda galaxy (M31) over the radial range 4 < R_proj < 225 kpc. The cospatial nature of these subcomponents render…
Constraining stellar population models - I. Age, metallicity, and abundance pattern compilation for Galactic globular clusters
Joel C. Roediger, Stephane Courteau, Genevieve Graves +1
We present an extenstive literature compilation of age, metallicity, and chemical abundance pattern information for the 41 Galactic globular clusters (GGCs) studied by Schiavon et…
Modeling Gas Evacuation Mechanisms in Present-Day Globular Clusters: Stellar Winds from Evolved Stars and Pulsar Heating
J. Naiman, M. Soares-Furtado, E. Ramirez-Ruiz
We employ hydrodynamical simulations to investigate the underlying mechanism responsible for the low levels of gas and dust in globular clusters. Our models examine the competing e…
Star Clusters in M31. V. Evidence for Self-Enrichment in Old M31 Clusters from Integrated Spectroscopy
Ricardo P. Schiavon, Nelson Caldwell, Charlie Conroy +5
In the past decade, the notion that globular clusters (GCs) are composed of coeval stars with homogeneous initial chemical compositions has been challenged by growing evidence that…
HST/WFC3 Observations of Low-Mass Globular Clusters AM 4 and Palomar 13: Physical Properties and Implications for Mass Loss
Katherine M. Hamren, Graeme H. Smith, Puragra GuhaThakurta +4
We investigate the loss of low-mass stars in two of the faintest globular clusters known, AM 4 and Palomar 13 (Pal 13), using HST/WFC3 F606W and F814W photometry. To determine the…
A Search for RR Lyrae Stars in Segue 2 and Segue 3
Erin Boettcher, Beth Willman, Ross Fadely +9
We present an extensive search for RR Lyrae stars in and around the ultra-faint Milky Way companions Segue 2 and Segue 3. The former (M_V = -2.5, Belokurov et al. 2009) appears to…
The AGORA High-Resolution Galaxy Simulations Comparison Project
Ji-hoon Kim, Tom Abel, Oscar Agertz +43
We introduce the AGORA project, a comprehensive numerical study of well-resolved galaxies within the LCDM cosmology. Cosmological hydrodynamic simulations with force resolutions of…
The Distribution of Dark Matter in the Milky Way's Disk
Annalisa Pillepich, Michael Kuhlen, Javiera Guedes +1
We present an analysis of the effects of dissipational baryonic physics on the local dark matter (DM) distribution at the location of the Sun, with an emphasis on the consequences…
An Explanation for the Different X-ray to Optical Column Densities in the Environments of Gamma Ray Bursts: A Progenitor Embedded in a Dense Medium
Yair Krongold, J. Xavier Prochaska
We study the > 10 ratios in the X-ray to optical column densities inferred from afterglow spectra of Gamma Ray Bursts due to gas surrounding their progenitors. We present time-evol…
CANDELS: The correlation between galaxy morphology and star formation activity at z~2
Bomee Lee, Mauro Giavalisco, Christina C. Williams +13
We discuss the state of the assembly of the Hubble Sequence in the mix of bright galaxies at redshift 1.4< z \le 2.5 with a large sample of 1,671 galaxies down to H_{AB}~26, select…
Chemical Abundance Evidence of Enduring High Star Formation Rates in an Early Type Galaxy: High [Ca/Fe] in NGC 5128 Globular Clusters
J. E. Colucci, M. F. Duran, R. A. Bernstein +1
We present [Fe/H], ages, and Ca abundances for an initial sample of 10 globular clusters in NGC 5128 obtained from high resolution, high signal-to-noise ratio echelle spectra of th…
Serendipitous discovery of a massive cD galaxy at z=1.096: Implications for the early formation and late evolution of cD galaxies
F. S. Liu, Yicheng Guo, David C. Koo +18
We have made a serendipitous discovery of a massive cD galaxy at z=1.096 in a candidate rich cluster in the HUDF area of GOODS-South. This brightest cluster galaxy is the most dist…
On the Coagulation and Size Distribution of Pressure Confined Cores
Xu Huang, Tingtao Zhou, D. N. C. Lin
Observations of the Pipe Nebula have led to the discovery of dense starless cores. The mass of most cores is too small for their self gravity to hold them together. Instead, they a…
Variation of Mid and Far-IR Luminosities among Early-Type Galaxies: Relation to Stellar Metallicity and Cold Dust
William G. Mathews, Pasquale Temi, Fabrizio Brighenti +1
The Hubble morphological sequence from early to late galaxies corresponds to an increasing rate of specific star formation. The Hubble sequence also follows a banana-shaped correla…
Measuring Detailed Chemical Abundances From Co-added Medium Resolution Spectra I. Tests using Milky Way dwarf spheroidal galaxies and globular clusters
Lei Yang, Evan N. Kirby, Puragra Guhathakurta +2
The ability to measure metallicities and α-element abundances in individual red giant branch (RGB) stars using medium-resolution spectra () is a valuable tool for d…