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Nucleosynthesis And The Inhomogeneous Chemical Evolution Of The Carina Dwarf Galaxy

Venn, Kim A.; Shetrone, Matthew D.; Irwin, Mike J.; Hill, Vanessa; Jablonka, Pascale; Tolstoy, Eline; Lemasle, Bertrand; Divell, Mike; Starkenburg, Else; Letarte, Bruno; Baldner, Charles; Battaglia, Giuseppina; Helmi, Amina; Kaufer, Andreas; Primas, Francesca (2012-06)

The detailed abundances of 23 chemical elements in nine bright red giant branch stars in the Carina dwarf spheroidal galaxy are presented based on high-resolution spectra gathered at the Very Large Telescope (VLT) and ...

Dwarfs Gobbling Dwarfs: A Stellar Tidal Stream Around NGC 4449 and Hierarchical Galaxy Formation on Small Scales

Martinez-Delgado, David; Romanowsky, Aaron J.; Gabany, R. Jay; Annibali, Francesca; Arnold, Jacob A.; Fliri, Jurgen; Zibetti, Stefano; van der Marel, Roeland P.; Rix, Hans-Walter; Chonis, Taylor S.; Carballo-Bello, Julio A.; Aloisi, Alessandra; Maccio, Andrea V.; Gallego-Laborda, J.; Brodie, Jean P.; Merrifield, Michael R. (2012-04)

A candidate diffuse stellar substructure was previously reported in the halo of the nearby dwarf starburst galaxy NGC 4449 by Karachentsev et al. We map and analyze this feature using a unique combination of deep ...

Galaxy Evolution In A Complex Environment: A Multi-Wavelength Study Of HCG 7

Konstantopoulos, I. S.; Gallagher, S. C.; Fedotov, K.; Durrell, P. R.; Heiderman, Amanda; Elmegreen, D. M.; Charlton, J. C.; Hibbard, J. E.; Tzanavaris, P.; Chandar, R.; Johnson, K. E.; Maybhate, A.; Zabludoff, A. E.; Gronwall, Caryl; Szathmary, D.; Hornschemeier, Ann E.; English, J.; Whitmore, B.; de Oliveira, C. M.; Mulchaey, J. S. (2010-11)

The environment where galaxies are found heavily influences their evolution. Close groupings, like the ones in the cores of galaxy clusters or compact groups, evolve in ways far more dramatic than their isolated counterparts. ...

B2 0902+34: A Collapsing Protogiant Elliptical Galaxy At Z=3.4

Adams, Joshua J.; Hill, Gary J.; MacQueen, Phillip J. (2009-03)

We have used the visible integral-field replicable unit spectrograph prototype, a new integral field spectrograph, to study the spatially and spectrally resolved Lyman-alpha emission line structure in the radio galaxy B2 ...

The Spectrally Resolved Lyman-Alpha Emission Of Three Lyman-Alpha-Selected Field Galaxies At Z Similar To 2.4 From The HETDEX Pilot Survey

Chonis, Taylor S.; Blanc, Guillermo A.; Hill, Gary J.; Adams, Joshua J.; Finkelstein, Steven L.; Gebhardt, Karl; Kollmeier, Juna A.; Ciardullo, Robin; Drory, Niv; Gronwall, Caryl; Hagen, Alex; Overzier, Roderik A.; Song, Mimi; Zeimann, Gregory R. (2013-10)

We present new results on the spectrally resolved Ly alpha emission of three Ly alpha-emitting field galaxies at z similar to 2.4 with high Lya equivalent width (> 100 angstrom) and Lya luminosity (similar to 10(43) erg ...

Nuclear Star Clusters From Clustered Star Formation

Agarwal, Meghann; Milosavljevic, Milos (2011-03)

Photometrically distinct nuclear star clusters (NSCs) are common in late-type disk and spheroidal galaxies. The formation of NSCs is inevitable in the context of normal star formation in which a majority of stars form in ...

CANDELS Observations Of The Environmental Dependence Of The Color-Mass-Morphology Relation At Z=1.6

Bassett, Robert; Papovich, Casey; Lotz, Jennifer M.; Bell, Eric F.; Finkelstein, Steven L.; Newman, Jeffrey A.; Tran, Kim-Vy; Almaini, Omar; Lani, Caterina; Cooper, Michael; Croton, Darren; Dekel, Avishai; Ferguson, Henry C.; Kocevski, Dale D.; Koekemoer, Anton M.; Koo, David C.; McGrath, Elizabeth J.; McIntosh, Daniel H.; Wechsler, Risa (2013-06)

We study the environmental dependence of color, stellar mass, and morphology by comparing galaxies in a forming cluster to those in the field at z = 1.6 with Hubble Space Telescope near-infrared imaging in the CANDELS/UDS ...

Bulges Of Nearby Galaxies With Spitzer: Scaling Relations In Pseudobulges And Classical Bulges

Fisher, David B.; Drory, Niv (2010-06)

We investigate scaling relations of bulges using bulge-disk decompositions at 3.6 mu m and present bulge classifications for 173 E-Sd galaxies within 20 Mpc. Pseudobulges and classical bulges are identified using Sersic ...

Structure and Formation of Elliptical and Spheroidal Galaxies

Kormendy, John; Fisher, David B.; Cornell, Mark E.; Bender, Ralf (2009-05)

New surface photometry of all known elliptical galaxies in the Virgo cluster is combined with published data to derive composite profiles of brightness, ellipticity, position angle, isophote shape, and color over large ...

History Of Galaxy Interactions And Their Impact On Star Formation Over The Last 7 Gyr From GEMS

Jogee, Shardha; Miller, Sarah H.; Penner, Kyle; Skelton, Rosalind E.; Conselice, Christopher J.; Somerville, Rachel S.; Bell, Eric F.; Zheng, Xian Zhong; Rix, Hans-Walter; Robaina, Aday R.; Barazza, Fabio D.; Barden, Marco; Borch, Andrea; Beckwith, Steven V. W.; Caldwell, John A. R.; Peng, Chien Y.; Heymans, Catherine; McIntosh, Daniel H.; Haeussler, Boris; Jahnke, Knud; Meisenheimer, Klaus; Sanchez, Sebastian F.; Wisotzki, Lutz; Wolf, Christian; Papovich, Casey (2009-06)

We perform a comprehensive estimate of the frequency of galaxy mergers and their impact on star formation over z similar to 0.24-0.80 (lookback time T(b) similar to 3-7 Gyr) using similar to 3600 (M >= 1 x 10(9) M(circle ...