Results 101 to 110 of about 16,260 (212)

The Star Cluster Population of M51

, 2004
We present the age and mass distribution of star clusters in M51. The structural parameters are found by fitting cluster evolution models to the spectral energy distribution consisting of 8 HST-WFPC2 pass bands. There is evidence for a burst of cluster formation at the moment of the second encounter with the companion NGC5195 (50-100 Myr ago) and a ...
Gieles, M., Bastian, N., Lamers, H. J. G. L. M.   +2 more
openaire   +2 more sources

ACS imaging of star clusters in M51. I. Identification and radius distribution

, 2007
We use HST/ACS observations of the spiral galaxy M51 in F435W, F555W and F814W to select a large sample of star clusters with accurate effective radius measurements in an area covering the complete disc of M51. We present the dataset and study the radius
Alvensleven, Anders, Ashman, Barmby, Bastian, Bastian, Bertin, Bik, Boily, Bonnor, Brand, de Grijs, Ebert, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elson, Feldmeier, Fellhauer, Fruchter, Fukui, García-Burillo, Geyer, Gieles, Gieles, Gieles, Goodwin, Goodwin, H. J. G. L. M. Lamers, Harris, Harris, Hasegan, Hesser, Hills, Hodge, Hunter, Hwang, Jordán, King, Kissler-Patig, Lada, Larsen, Larsen, Larsen, Larson, Lee, M. Gieles, M. R. Haas, Mackey, Mateo, Moffat, N. Bastian, R. A. Scheepmaker, Rix, Rosolowsky, S. S. Larsen, Sanders, Schlegel, Sirianni, Solomon, Van den Bergh, Williams, Zepf, Zhang, Zimmer   +66 more
core   +1 more source

Identification of the Red Supergiant Progenitor of Supernova 2005cs: Do the Progenitors of Type II-P Supernovae Have Low Mass?

, 2005
The stars that end their lives as supernovae (SNe) have been directly observed in only a handful of cases, due mainly to the extreme difficulty in identifying them in images obtained prior to the SN explosions.
Adam G. Riess, Alexei V. Filippenko, Barbon R., Chugai N. N., Della Valle M., Gal-Yam A., Georgiev T. B., Immler S., Issa M. R., Jean‐Charles Cuillandre, Joshua S. Bloom, Kloehr W., Leaman J., Li W., Li W., Li W., Li W., Mario Livio, Maund J. R., Modjaz M., Munari U., Mutchler M., Saurabh Jha, Schuyler D. Van Dyk, Stathakis R. A., Weidong Li   +25 more
core   +3 more sources

Fire and Ice in the Whirlpool: Spatially Resolved Scaling Relations between X-Ray-emitting Hot Gas and Cold Molecular Gas in M51

The Astrophysical Journal Letters
The cold and hot interstellar medium in star-forming galaxies resembles the reservoir for star formation and associated heating by stellar winds and explosions during stellar evolution, respectively.
Chunyi Zhang, Junfeng Wang, Tian-Wen Cao
doaj   +1 more source

The Discovery of Quasisoft and Supersoft Sources in External Galaxies

, 2004
We apply a uniform procedure to select very soft sources from point sources observed by Chandra in 4 galaxies. This sample includes one elliptical galaxy (NGC 4967), 2 face-on spirals (M101 and M83), and an interacting galaxy (M51).
A. K. H. Kong, Greiner J., Greiner J., Kong A. K. H., R. Di Stefano, Thatte N.   +5 more
core   +1 more source

Spikes in the SED and Ripples in the Outskirts of Galaxies

, 2012
We describe a new method that allows us to quantitatively characterize galactic satellites from analysis of disturbances in outer gas disks, without requiring knowledge of their optical light.
Chang, Salo, Sukanya Chakrabarti
core   +1 more source

Morphology and Kinematics of the Gas in M51: How Interaction with NGC 5195 Has Molded the Structure of Its Arms

The Astrophysical Journal
The Whirlpool Galaxy is a well-studied grand design galaxy with two major spiral arms, and a large satellite NGC 5195. The arms both show long uniform sections with perturbations (“kinks” or sharp turns) in specific regions.
Joan Font, John E. Beckman, Benoît Epinat, Clare L. Dobbs, Miguel Querejeta   +4 more
doaj   +1 more source

Bis(morpholin-4-ium) tetrachloridocobalt(II)

Acta Crystallographica Section E, 2012
The title compound, (C4H10NO)2[CoCl4], is an ionic compound consisting of two protonated tetrahydro-1,4-oxazine (morpholine) cations and a [CoCl4]2− dianion. The CoII ion is in a tetrahedral coordination geometry.
Wen-Zhen Wang, Rayyat Huseyn Ismayilov, Gene-Hsiang Lee, Yuh-Sheng Wen, Shie-Ming Peng   +4 more
doaj   +1 more source

Short GMC lifetimes: an observational estimate with the PdBI Arcsecond Whirlpool Survey (PAWS)

, 2015
We describe and execute a novel approach to observationally estimate the lifetimes of giant molecular clouds (GMCs). We focus on the cloud population between the two main spiral arms in M51 (the inter-arm region) where cloud destruction via shear and ...
Colombo, Dario, Dobbs, Clare L., Dumas, Gaelle, Garcia-Burillo, Santiago, Hughes, Annie, Kramer, Carsten, Leroy, Adam K., Meidt, Sharon E., Pety, Jerome, Querejeta, Miguel, Schinnerer, Eva, Schuster, Karl F., Thompson, Todd A.   +12 more
core   +3 more sources

Does informatization improve labor investment efficiency? Evidence from China’s IT and industrial integration pilot zones

International Review of Economics & Finance
This study investigates the effect of government-led informatization on labor investment efficiency. We leverage the staggered rollout of national Pilot Zones for the Integration of Informatization and Industrialization (PZII) between 2009 and 2011 as an
Luya Feng, Yiqun Xie, Yangyang Wang, Donghui Li   +3 more
doaj   +1 more source