Browsing Journal Articles by Subject "galaxies"

Now showing items 1-18 of 18

A high-dispersion molecular gas component in nearby galaxies

Author: Caldú-Primo, Anahi ; Schruba, Andreas ; Walter, Fabian ; Leroy, Adam ; Sandstrom, Karin ; de Blok, W J G ; Ianjamasimanana, R ; Mogotsi, K M Date: 2013 We present a comprehensive study of the velocity dispersion of the atomic (H I) and molecular (H2) gas components in the disks (R R 25) of a sample of 12 nearby spiral galaxies with moderate inclinations. Our analysis is based on sensitive ... Read more
Cosmological constraints from the SDSS luminous red galaxies

Author: Tegmark, Max ; Eisenstein, Daniel J ; Strauss, Michael A ; Weinberg, David H ; Blanton, Michael R ; Frieman, Joshua A ; Fukugita, Masataka ; Gunn, James E ; Hamilton, Andrew J S ; Knapp, Gillian R ; Nichol, Robert C ; Ostriker, Jeremiah P ; Padmanabhan, Nikhil ; Percival, Will J ; Schlegel, David J ; Schneider, Donald P ; Scoccimarro, Roman ; Seljak, Uroš ; Seo, Hee-Jong ; Swanson, Molly ; Szalay, Alexander S ; Vogeley, Michael S ; Yoo, Jaiyul ; Zehavi, Idit ; Abazajian, Kevork ; Anderson, Scott F ; Annis, James ; Bahcall, Neta A ; Bassett, Bruce ; Berlind, Andreas ; Brinkmann, Jon ; Budavári, Tamás Date: 2006 No abstract prepared. Read more
DEGREE OF POLARIZATION AND SOURCE COUNTS OF FAINT RADIO SOURCES FROM STACKING POLARIZED INTENSITY

Author: Stil, J M ; Keller, B W ; George, S J ; Taylor, A R Date: 2014 We present stacking polarized intensity as a means to study the polarization of sources that are too faint to be detected individually in surveys of polarized radio sources. Stacking offers not only high sensitivity to the median signal of a ... Read more
Evidence for a clumpy, rotating gas disk in a submillimeter galaxy at z = 4

Author: Hodge, J A ; Carilli, C L ; Walter, F ; de Blok, W J G ; Riechers, D ; Daddi, E ; Lentati, L Date: 2012 We present Karl G. Jansky Very Large Array observations of the CO(2-1) emission in the z = 4.05 submillimeter galaxy (SMG) GN20. These high-resolution data allow us to image the molecular gas at 1.3 kpc resolution just 1.6 Gyr after the big ... Read more
Improved constraints on type Ia supernova host galaxy properties using multi-wavelength photometry and their correlations with supernova properties

Author: Gupta, Ravi R ; D’Andrea, Chris B ; Sako, Masao ; Conroy, Charlie ; Smith, Mathew ; Bassett, Bruce ; Frieman, Joshua A ; Garnavich, Peter M ; Jha, Saurabh W ; Kessler, Richard ; Lampeitl, Hubert ; Marriner, John ; Nichol, Robert C ; Schneider, Donald P Date: 2011 We improve estimates of the stellar mass and mass-weighted average age of Type Ia supernova (SN Ia) host galaxies by combining UV and near-IR photometry with optical photometry in our analysis. Using 206 SNe Ia drawn from the full three-year ... Read more
Mid-infrared selection of active galactic nuclei with the wide-field infrared survey explorer. II. properties of wise -selected active galactic nuclei in the NDWFS Boötes field

Author: Assef, R J ; Stern, D ; Kochanek, C S ; Blain, A W ; Brodwin, M ; Brown, M J I ; Donoso, E ; Eisenhardt, P R M ; Jannuzi, B T ; Jarrett, T H ; Stanford, S A ; Tsai, C W ; Wu, J ; Yan, L Date: 2013 Stern et al. presented a study of Wide-field Infrared Survey Explorer (WISE) selection of active galactic nuclei (AGNs) in the 2 deg2 COSMOS field, finding that a simple criterion W1-W2 ≥ 0.8 provides a highly reliable and complete AGN sample ... Read more
OPTICAL DISCOVERY OF PROBABLE STELLAR TIDAL DISRUPTION FLARES

Author: van Velzen, Sjoert ; Farrar, Glennys R ; Gezari, Suvi ; Morrell, Nidia ; Zaritsky, Dennis ; Östman, Linda ; Smith, Mathew ; Gelfand, Joseph ; Drake, Andrew J Date: 2011 Using archival Sloan Digital Sky Survey (SDSS) multi-epoch imaging data (Stripe 82), we have searched for the tidal disruption of stars by supermassive black holes in non-active galaxies. Two candidate tidal disruption events (TDEs) are ... Read more
Physical Properties of Molecular Clouds at 2 pc Resolution in the Low-metallicity Dwarf Galaxy NGC 6822 and the Milky Way

Author: Leroy, Adam K ; Bigiel, Frank ; Bolatto, Alberto D ; Tacconi, Linda ; Dishoeck, Ewine F van ; Walter, Fabian Date: 2017 We present the Atacama Large Millimeter/submillimeter Array survey of CO(2-1) emission from the 1/5 solar metallicity, Local Group dwarf galaxy NGC 6822. We achieve high (0buildrel{primeprime}over{.} 9≈ 2 pc) spatial resolution while covering ... Read more
Spectroscopic properties of star-forming host galaxies and type Ia supernova hubble residuals in a nearly unbiased sample

Author: D\'Andrea, Chris B ; Gupta, Ravi R ; Sako, Masao ; Morris, Matt ; Nichol, Robert C ; Brown, Peter J ; Campbell, Heather ; Olmstead, Matthew D ; Frieman, Joshua A ; Garnavich, Peter ; Jha, Saurabh W ; Kessler, Richard ; Lampeitl, Hubert ; Marriner, John ; Schneider, Donald P ; Smith, Mathew Date: 2011 We examine the correlation between supernova (SN) host-galaxy properties and their residuals in the Hubble diagram. We use SNe discovered during the Sloan Digital Sky Survey-II Supernova Survey, and focus on objects at a redshift of z < 0.15, ... Read more
SPIRITS: Uncovering Unusual Infrared Transients with Spitzer

Author: Kasliwal, Mansi M ; Bally, John ; Masci, Frank ; Cody, Ann Marie ; Bond, Howard E ; Jencson, Jacob E ; Cao, Yi ; Boyer, Martha ; Cantiello, Matteo ; Cook, David ; Hsiao, Eric ; Khan, Rubab M ; Milne, Peter ; Morrell, Nidia ; Ofek, Eran O ; Perley, Daniel A ; Phillips, Mark ; Prince, Thomas A ; Shenoy, Dinesh ; Surace, Jason ; Dyk, Schuyler D Van ; Whitelock, Patricia A ; Williams, Robert Date: 2017 We present an ongoing, five-year systematic search for extragalactic infrared transients, dubbed SPIRITS—SPitzer InfraRed Intensive Transients Survey. In the first year, using Spitzer /IRAC, we searched 190 nearby galaxies with cadence baselines ... Read more
THE CENTRAL SLOPE OF DARK MATTER CORES IN DWARF GALAXIES: SIMULATIONS VERSUS THINGS

Author: Oh, Se-Heon ; Brook, Chris ; Governato, Fabio ; Brinks, Elias ; Mayer, Lucio ; de Blok, W J G ; Brooks, Alyson ; Walter, Fabian Date: 2011 We make a direct comparison of the derived dark matter (DM) distributions between hydrodynamical simulations of dwarf galaxies assuming ACDM cosmology and the observed dwarf galaxies sample from the THINGS survey in terms of (1) the rotation ... Read more
The effect of peculiar velocities on supernova cosmology

Author: Davis, Tamara M ; Hui, Lam ; Frieman, Joshua A ; Haugbølle, Troels ; Kessler, Richard ; Sinclair, Benjamin ; Sollerman, Jesper ; Bassett, Bruce ; Marriner, John ; Mörtsell, Edvard ; Nichol, Robert C ; Richmond, Michael W ; Sako, Masao ; Schneider, Donald P ; Smith, Mathew Date: 2011 We analyze the effect that peculiar velocities have on the cosmological inferences we make using luminosity distance indicators, such as Type Ia supernovae. In particular we study the corrections r ... Read more
THE EFFECT OF WEAK LENSING ON DISTANCE ESTIMATES FROM SUPERNOVAE

Author: Smith, Mathew ; Bacon, David J ; Nichol, Robert C ; Campbell, Heather ; Clarkson, Chris ; Maartens, Roy ; D\'Andrea, Chris B ; Bassett, Bruce A ; Cinabro, David ; Finley, David A ; Frieman, Joshua A ; Galbany, Lluís ; Garnavich, Peter M ; Olmstead, Matthew D ; Schneider, Donald P ; Shapiro, Charles ; Sollerman, Jesper Date: 2014 Using a sample of 608 Type Ia supernovae from the SDSS-II and BOSS surveys, combined with a sample of foreground galaxies from SDSS-II, we estimate the weak lensing convergence for each supernova l ... Read more
The highly obscured region around PKS 1343 – 601: I. Galactic interstellar extinctions using DENIS galaxy colours

Author: Schröder, A C ; Mamon, G A ; Kraan-Korteweg, R C ; Woudt, P A Date: 2007 The highly obscured radio-bright galaxy Read more
The impact of the gas distribution on the determination of dynamical masses of galaxies using unresolved observations

Author: de Blok, W J G ; Walter, Fabian Date: 2014 Dynamical mass (M dyn) is a key property of any galaxy, yet a determination of M dyn is not straightforward if spatially resolved measurements are not available. This situation occurs in single-dish H I observations of the local universe, but ... Read more
THE SDSS-II SUPERNOVA SURVEY: PARAMETERIZING THE TYPE Ia SUPERNOVA RATE AS A FUNCTION OF HOST GALAXY PROPERTIES

Author: Smith, Mathew ; Nichol, Robert C ; Dilday, Benjamin ; Marriner, John ; Kessler, Richard ; Bassett, Bruce ; Cinabro, David ; Frieman, Joshua ; Garnavich, Peter ; Jha, Saurabh W ; Lampeitl, Hubert ; Sako, Masao ; Schneider, Donald P ; Sollerman, Jesper Date: 2012 Using data from the Sloan Digital Sky Supernova Survey-II (SDSS-II SN Survey), we measure the rate of Type Ia supernovae (SNe Ia) as a function of galaxy properties at intermediate redshift. A samp ... Read more
The seventh data release of the sloan digital sky survey

Author: Abazajian, Kevork N ; Adelman‐McCarthy, Jennifer K ; AgYeros, Marcel A ; Allam, Sahar S ; Prieto, Carlos Allende ; An, Deokkeun ; Anderson, Kurt S J ; Anderson, Scott F ; Annis, James ; Bahcall, Neta A ; Bailer‐Jones, C A L ; Barentine, J C ; Bassett, Bruce A ; Becker, Andrew C ; Beers, Timothy C ; Bell, Eric F ; Belokurov, Vasily ; Berlind, Andreas A ; Berman, Eileen F ; Bernardi, Mariangela ; Bickerton, Steven J ; Bizyaev, Dmitry ; Blakeslee, John P ; Blanton, Michael R ; Bochanski, John J ; Boroski, William N ; Brewington, Howard J ; Brinchmann, Jarle ; Brinkmann, J ; Brunner, Robert J ; Budavári, Tamás ; Carey, Larry N Date: 2009 This paper describes the Seventh Data Release of the Sloan Digital Sky Survey (SDSS), marking the completion of the original goals of the SDSS and the end of the phase known as SDSS-II. It includes 11, 663 deg2 of imaging data, with most of ... Read more
Thick disks of edge-on galaxies seen through the spitzer survey of stellar structure in galaxies (s 4 g): lair of missing baryons?

Author: Comerón, Sébastien ; Elmegreen, Bruce G ; Knapen, Johan H ; Salo, Heikki ; Laurikainen, Eija ; Laine, Jarkko ; Athanassoula, E ; Bosma, Albert ; Sheth, Kartik ; Regan, Michael W ; Hinz, Joannah L ; de Paz, Armando Gil ; Menéndez-Delmestre, Karín ; Mizusawa, Trisha ; Muñoz-Mateos, Juan-Carlos ; Seibert, Mark ; Kim, Taehyun ; Elmegreen, Debra M ; Gadotti, Dimitri A ; Ho, Luis C ; Holwerda, Benne W ; Lappalainen, Jani ; Schinnerer, Eva ; Skibba, Ramin Date: 2011 Most, if not all, disk galaxies have a thin (classical) disk and a thick disk. In most models thick disks are thought to be a necessary consequence of the disk formation and/or evolution of the galaxy. We present the results of a study of the ... Read more

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