Showing 2014 · astro-ph.GAShow all

21 papers · 2 filters

astro-ph.GA2014★ 5 cited

Recent stellar mass assembly of low-mass star-forming galaxies at redshifts 0.3 < z < 0.9

Lucía Rodríguez-Muñoz, Jesús Gallego, Camilla Pacifici +5

The epoch when low-mass star forming galaxies (LMSFGs) form the bulk of their stellar mass is uncertain. While some models predict an early formation, others favor a delayed scenar…

astro-ph.GA2014★ 36 cited

Low-resolution Spectroscopy for the Globular Clusters with Signs of Supernova Enrichment: M22, NGC 1851 and NGC 288

Dongwook Lim, Sang-Il Han, Young-Wook Lee +5

There is increasing evidence for the presence of multiple red giant branches (RGBs) in the color-magnitude diagrams of massive globular clusters (GCs). In order to investigate the…

astro-ph.GA2014★ 85 cited

On the importance of using appropriate spectral models to derive physical properties of galaxies at 0.7<z<2.8

Camilla Pacifici, Elisabete da Cunha, Stéphane Charlot +14

Interpreting observations of distant galaxies in terms of constraints on physical parameters - such as stellar mass, star-formation rate (SFR) and dust optical depth - requires spe…

astro-ph.GA2014★ 15 cited

Misclassified type 1 AGNs in the local universe

Jong-Hak Woo, Ji-Gang Kim, Daeseong Park +5

We search for misclassified type 1 AGNs among type 2 AGNs identified with emission line flux ratios, and investigate the properties of the sample. Using 4\,113 local type 2 AGNs at…

astro-ph.GA2014★ 20 cited

Probing the role of dynamical friction in shaping the BSS radial distribution. I - Semi-analytical models and preliminary N-body simulations

P. Miocchi, M. Pasquato, B. Lanzoni +5

We present semi-analytical models and simplified -body simulations with and particles aimed at probing the role of dynamical friction (DF) in determining the radia…

astro-ph.GA2014★ 11 cited

Tidal stripping stellar substructures around four metal-poor globular clusters in the Galactic bulge

Sang-Hyun Chun, Minhee Kang, DooSeok Jung +1

We investigate the spatial density configuration of stars around four metal-poor globular clusters (NGC 6266, NGC 6626, NGC 6642 and NGC 6723) in the Galactic bulge region using wi…

astro-ph.GA2014★ 36 cited

Sussing Merger Trees : The Impact of Halo Merger Trees on Galaxy Properties in a Semi-Analytic Model

Jaehyun Lee, Sukyoung K. Yi, Pascal J. Elahi +13

A halo merger tree forms the essential backbone of a semi-analytic model for galaxy formation and evolution. Recent studies have pointed out that extracting merger trees from numer…

astro-ph.GA2014★ 8 cited

Early-type galaxies at intermediate redshift observed with HST WFC3: perspectives on recent star-formation

M. Rutkowski, H. Jeong, S. H. Cohen +7

We present an analysis of the stellar populations of 102 visually-selected early-type galaxies (ETGs) with spectroscopic redshifts (0.3<z<1.5) from observations in the Early Releas…

astro-ph.GA2014★ 75 cited

A Census of Gas Outflows in Type 2 Active Galactic Nuclei

Hyun-Jin Bae, Jong-Hak Woo

We perform a census of ionized gas outflows using a sample of ~23,000 type 2 active galactic nuclei (AGNs) out to z~0.1. By measuring the velocity offset of narrow emission lines,…

astro-ph.GA2014★ 32 cited

Effects of large-scale environment on the assembly history of central galaxies

Intae Jung, Jaehyun Lee, Sukyoung K. Yi

We examine whether large-scale environment affects the mass assembly history of their central galaxies. To facilitate this, we constructed dark matter halo merger trees from a cosm…

astro-ph.GA2014★ 56 cited

Formation of Warped Disks by Galactic Fly-by Encounters. I. Stellar Disks

Jeonghwan H. Kim, Sebastien Peirani, Sungsoo Kim +3

Warped disks are almost ubiquitous among spiral galaxies. Here we revisit and test the `fly-by scenario' of warp formation, in which impulsive encounters between galaxies are respo…

astro-ph.GA2014★ 66 cited

Hubble Space Telescope Grism Spectroscopy of Extreme Starbursts Across Cosmic Time: The Role of Dwarf Galaxies in the Star Formation History of the Universe

Hakim Atek, Jean-Paul Kneib, Camilla Pacifici +15

Near infrared slitless spectroscopy with the Wide Field Camera 3, onboard the Hubble Space Telescope, offers a unique opportunity to study low-mass galaxy populations at high-redsh…

astro-ph.GA2014★ 121 cited

The Nature of Extreme Emission Line Galaxies at z=1-2: Kinematics and Metallicities from Near-Infrared Spectroscopy

Michael V. Maseda, Arjen van der Wel, Hans-Walter Rix +21

We present near-infrared spectroscopy of a sample of 22 Extreme Emission Line Galaxies at redshifts 1.3 < z < 2.3, confirming that these are low-mass (M* = 10^8 - 10^9 M_sun) galax…

astro-ph.GA2014★ 89 cited

Keck-I MOSFIRE spectroscopy of compact star-forming galaxies at z2: High velocity dispersions in progenitors of compact quiescent galaxies

G. Barro, J. R. Trump, D. C. Koo +28

We present Keck-I MOSFIRE near-infrared spectroscopy for a sample of 13 compact star-forming galaxies (SFGs) at redshift with star formation rates of SFR100…

astro-ph.GA2014★ 84 cited

On the lifetime of merger features of equal-mass disk mergers

Inchan Ji, Sebastien Peirani, Sukyoung K. Yi

Detecting post-merger features of merger remnants is highly dependent on the depth of observation images. However, it has been poorly discussed how long the post-merger features ar…

astro-ph.GA2014★ 34 cited

Multiple Populations in Globular Clusters and the Origin of the Oosterhoff Period Groups

Sohee Jang, Young-Wook Lee, Seok-Joo Joo +1

The presence of multiple populations is now well-established in most globular clusters in the Milky Way. In light of this progress, here we suggest a new model explaining the origi…

astro-ph.GA2014★ 20 cited

Molecular Gas Content of HI Monsters and Implications to Cold Gas Content Evolution in Galaxies

Cheoljong Lee, Aeree Chung, Min S. Yun +3

We present 12CO (J=1-0) observations of a sample of local galaxies (0.04<z<0.08) with a large neutral hydrogen reservoir, or "HI monsters". The data were obtained using the Redshif…

astro-ph.GA2014★ 192 cited

AGN Emission Line Diagnostics and the Mass-Metallicity Relation up to Redshift z~2: the Impact of Selection Effects and Evolution

Stéphanie Juneau, Frédéric Bournaud, Stéphane Charlot +13

Emission line diagnostic diagrams probing the ionization sources in galaxies, such as the Baldwin-Phillips-Terlevich (BPT) diagram, have been used extensively to distinguish AGN fr…

astro-ph.GA2014★ 1k cited

3D-HST WFC3-selected Photometric Catalogs in the Five CANDELS/3D-HST Fields: Photometry, Photometric Redshifts and Stellar Masses

Rosalind E. Skelton, Katherine E. Whitaker, Ivelina G. Momcheva +24

The 3D-HST and CANDELS programs have provided WFC3 and ACS spectroscopy and photometry over ~900 square arcminutes in five fields: AEGIS, COSMOS, GOODS-North, GOODS-South, and the…

astro-ph.GA2014★ 713 cited

The Green Valley is a Red Herring: Galaxy Zoo reveals two evolutionary pathways towards quenching of star formation in early- and late-type galaxies

Kevin Schawinski, C. Megan Urry, Brooke D. Simmons +13

We use SDSS+\textit{GALEX}+Galaxy Zoo data to study the quenching of star formation in low-redshift galaxies. We show that the green valley between the blue cloud of star-forming g…

astro-ph.GA2014★ 34 cited

Diffuse Gas in Galaxies Sheds New Light on the Origin of Type Ia Supernovae

Jonas Johansson, Tyrone E. Woods, Marat Gilfanov +3

We measure the strength of HeII4686 nebular emission in passively evolving ("retired") galaxies, aiming to constrain their populations of hot accreting white dwarfs (WDs) in the…