Search

Now showing items 1-9 of 9

The HETDEX Pilot Survey. III. The Low Metallicities Of High-Redshift Ly Alpha Galaxies

Finkelstein, Steven L.; Hill, Gary J.; Gebhardt, Karl; Adams, Joshua; Blanc, Guillermo A.; Papovich, Casey; Ciardullo, Robin; Drory, Niv; Gawiser, Eric; Gronwall, Caryl; Schneider, Donald P.; Tran, Kim-Vy (2011-03)

We present the results of Keck/NIRSPEC spectroscopic observations of three Ly alpha emitting galaxies (LAEs) at z similar to 2.3 discovered with the HETDEX pilot survey. We detect H alpha, [OIII], and H beta emission from ...

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 ...

The HETDEX Pilot Survey. II. The Evolution Of The Ly Alpha Escape Fraction From The Ultraviolet Slope And Luminosity Function Of 1.9 < Z < 3.8 Laes

Blanc, Guillermo A.; Adams, Joshua J.; Gebhardt, Karl; Hill, Gary J.; Drory, Niv; Hao, Lei; Bender, Ralf; Ciardullo, Robin; Finkelstein, Steven L.; Fry, Alexander B.; Gawiser, Eric; Gronwall, Caryl; Hopp, Ulrich; Jeong, Donghui; Kelzenberg, Ralf; Komatsu, Eiichiro; MacQueen, Phillip; Murphy, Jeremy D.; Roth, Martin M.; Schneider, Donald P.; Tufts, Joseph (2011-07)

We study the escape of Ly alpha photons from Ly alpha emitting galaxies (LAEs) and the overall galaxy population using a sample of 99 LAEs at 1.9 < z < 3.8 detected through integral-field spectroscopy of blank fields by ...

A New Z=0 Metagalactic Ultraviolet Background Limit

Adams, Joshua J.; Uson, Juan M.; Hill, Gary J.; MacQueen, Phillip J. (2011-02)

We present new integral-field spectroscopy in the outskirts of two nearby, edge-on, late-type galaxies to search for the H alpha emission that is expected from the exposure of their hydrogen gas to the metagalactic ultraviolet ...

The Rest-Frame Ultraviolet Spectra Of UV-Selected Active Galactic Nuclei At Z Similar To 2-3

Hainline, Kevin N.; Shapley, Alice E.; Greene, Jenny E.; Steidel, Charles C. (2011-05)

We present new results for a sample of 33 narrow-lined UV-selected active galactic nuclei (AGNs), identified in the course of a spectroscopic survey for star-forming galaxies at z similar to 2-3. The rest-frame UV composite ...

Demographics of Bulge Types Within 11 Mpc and Implications for Galaxy Evolution

Fisher, David B.; Drory, Niv (2011-06)

We present an inventory of galaxy bulge types (elliptical galaxy, classical bulge, pseudobulge, and bulgeless galaxy) in a volume-limited sample within the local 11 Mpc sphere using Spitzer 3.6 mu m and Hubble Space Telescope ...

A Petal Of The Sunflower: Photometry Of The Stellar Tidal Stream In The Halo Of Messier 63 (NGC 5055)

Chonis, Taylor S.; Martinez-Delgado, David; Gabany, R. Jay; Majewski, Steven R.; Hill, Gary J.; Gralak, Ray; Trujillo, Ignacio (2011-11)

We present deep surface photometry of a very faint, giant arc-loop feature in the halo of the nearby spiral galaxy NGC 5055 (M63) that is consistent with being a part of a stellar stream resulting from the disruption of a ...

The HETDEX Pilot Survey. I. Survey Design, Performance, and Catalog of Emission-Line Galaxies

Adams, Joshua J.; Blanc, Guillermo A.; Hill, Gary J.; Gebhardt, Karl; Drory, Niv; Hao, Lei; Bender, Ralf; Byun, Joyce; Ciardullo, Robin; Cornell, Mark E.; Finkelstein, Steven L.; Fry, Alex; Gawiser, Eric; Gronwall, Caryl; Hopp, Ulrich; Jeong, Donghui; Kelz, Andreas; Kelzenberg, Ralf; Komatsu, Eiichiro; MacQueen, Phillip J.; Murphy, Jeremy; Odoms, P. Samuel; Roth, Martin; Schneider, Donald P.; Tufts, Joseph R.; Wilkinson, Christopher P. (2011-01)

We present a catalog of emission-line galaxies selected solely by their emission-line fluxes using awide-field integral field spectrograph. This work is partially motivated as a pilot survey for the upcoming Hobby-Eberly ...

Insights On The Formation, Evolution, And Activity Of Massive Galaxies From Ultracompact And Disky Galaxies At Z=2-3

Weinzirl, Tim; Jogee, Shardha; Conselice, Christopher J.; Papovich, Casey; Chary, Ranga-Ram; Bluck, Asa; Grutzbauch, Ruth; Buitrago, Fernando; Mobasher, Bahram; Lucas, Ray A.; Dickinson, Mark; Bauer, Amanda E. (2011-12)

We present our results on the structure and activity of massive galaxies at z = 1-3 using one of the largest (166 with M-star >= 5 x 10(10) M-circle dot) and most diverse samples of massive galaxies derived from the ...