Results 41 to 50 of about 16,260 (212)

The nature of the low-frequency emission of M51: First observations of a nearby galaxy with LOFAR [PDF]

, 2014
The grand-design spiral galaxy M51 was observed with the LOFAR High Frequency Antennas (HBA) and imaged in total intensity and polarisation. This observation covered the frequencies between 115 MHz and 175 MHz.
Adebahr, B., Anderson, J. M., Beck, R., Bonafede, A., Brunetti, G., Brüggen, M., Chyży, K. T., Conway, J., Dettmar, R-J., Enßlin, T., Fletcher, A., Haverkorn, M., Heald, G., Horellou, C., Horneffer, A., Iacobelli, M., Israel, F. P., Junklewitz, H., Jurusik, W., Kuniyoshi, M., Köhler, J., Mulcahy, D. D., Orrú, E., Paladino, R., Pizzo, R., Reich, W., Röttgering, H. J. A., Scaife, A.   +27 more
core   +5 more sources

VESTIGE OF THE STAR CLUSTER BURST IN M51 [PDF]

The Astrophysical Journal, 2009
We present a study of the star cluster formation in M51 based on the image data taken with Advanced Camera for Surveys (ACS) and Wide Field Planetary Camera 2 (WFPC2) of Hubble Space Telescope (HST). We have derived the star cluster formation rate using the ages and masses of about 2,000 star clusters estimated by comparing photometric data (F336W ...
Hwang, Narae, Lee, Myung Gyoon
openaire   +2 more sources

Improved distance determination to M51 from supernovae 2011dh and 2005cs [PDF]

, 2012
The appearance of two recent supernovae, SN 2011dh and 2005cs, both in M51, provides an opportunity to derive an improved distance to their host galaxy by combining the observations of both SNe.
A. Pál, Arcavi, Baron, Bartel, Bessell, Branch, Bruzual, Dessart, Dessart, Dessart, Dolphin, Eastman, G. H. Marion, Gnedin, Griga, Hamuy, J. C. Wheeler, J. Kelemen, J. Vinkó, K. Sárneczky, K. Takáts, K. Vida, Kirshner, Kloehr, Leonard, Leonard, Li, Li, Marion, Martí-Vidal, Maund, Maund, Modjaz, N. Szalai, P. Klagyivik, P. M. Garnavich, Pastorello, Pastorello, Schlegel, T. Szalai, Takáts, Takáts, Van Dyk, Vinkó   +43 more
core   +3 more sources

Giant Molecular Associations in M51 [PDF]

Proceedings of the International Astronomical Union, 2006
AbstractWe present a 12CO 2-1 map of M51 (Schuster et al. 2006) at 11″ resolution observed with HERA at the IRAM-30m telescope. The map covers the companion galaxy NGC5195 as well as the south-western arm out to 12 kpc. Using the IRAM-30m data and the clump finding procedure GAUSSCLUMPS (Stutzki et al.
M. Hitschfeld, C. Kramer, K. Schuster, S. Garcia-Burillo, J. Stutzki   +4 more
openaire   +1 more source

Clues to the formation of spiral structure in M51 from the ages and locations of star clusters [PDF]

, 2017
We determine the spatial distributions of star clusters at different ages in the grand-design spiral galaxy M51 using a new catalog based on multi-band images taken with the Hubble Space Telescope (HST). These distributions, when compared with the spiral
Calzetti, Daniela, Chandar, Rupali, Chien, L-H, Dinino, Daiana, Dobbs, Clare, Kennicutt, Robert C, Querejeta, Miguel, Regan, Michael, Schinnerer, Eva, van der Wel, Sharon Meidt, Whitmore, Bradley C   +10 more
core   +1 more source

Molecular Clouds in M51 and in the Galaxy [PDF]

Highlights of Astronomy, 1986
Studies of molecular clouds in nearby galaxies require high angular resolution. Ten arcseconds corresponds to 0.5 kpc at the distance of M51. Typical gigant molecular clouds (GMC:s) have a size of 5-30 pc (Solomon et al. 1985). However complexes of GMC: s (Superclouds) can be several hundred parsecs (Elmegreen 1985; Rivolo et al. 1985).
Per Friberg, Åke Hjalmarson
openaire   +1 more source

The Magnetized Disk-Halo Transition Region of M51

, 2018
An excellent laboratory for studying large scale magnetic fields is the grand de- sign face-on spiral galaxy M51. Due to wavelength-dependent Faraday depolarization, linearly polarized synchrotron emission at different radio frequencies gives a picture ...
Basu, A., Beck, R., Fletcher, A., Haverkorn, M., Kierdorf, M., Mao, S. A., Ott, J., Tabatabaei, F.   +7 more
core   +1 more source

Hydrogen Radio Recombination Line Emission from M51 and NGC628 [PDF]

, 2018
We report the discovery of hydrogen radio recombination line (RRL) emission from two galaxies with star formation rates (SFRs) similar to that of the Milky Way: M51 and NGC628.
Anderson, L. D., Balser, Dana S., Bania, T. M., Kepley, Amanda A., Luisi, Matteo, Wenger, Trey V.   +5 more
core   +1 more source

Biosynthesis of Silver Nanoparticles Using Black Pepper (Piper nigrum) Seed Extract and Evaluation of Their Cytotoxicity. [PDF]

Chem Biodivers
This study reports the green biosynthesis of piperine‐functionalized silver nanoparticles from Piper nigrum seed extract, followed by comprehensive physicochemical characterization and in vitro cytotoxic evaluation. The results confirm successful nanocomposite formation and demonstrate a marked enhancement of cytotoxic activity against gastric cancer ...
Maciel NF, do Lago GV, da Silva Pereira GV, de Farias Ramos IN, Bastos AC, Barreto IAR, Moraes NS, Dos Santos MN, Pereira da Rocha JA, Machado AK, Junior WGP, da Silva Pessoa MM, Uesugi MNM, Khayat AS, Cruz JN, do Rêgo JA, Joele MRSP, Brasil DDSB.   +17 more
europepmc   +2 more sources

Constraining regular and turbulent magnetic field strengths in M51 via Faraday depolarization [PDF]

, 2014
We employ an analytical model that incorporates both wavelength-dependent and wavelength-independent depolarization to describe radio polarimetric observations of polarization at $\lambda \lambda \lambda \, 3.5, 6.2, 20.5$ cm in M51 (NGC 5194).
Fletcher, Andrew, Haverkorn, Marijke, Shneider, Carl, Shukurov, Anvar   +3 more
core   +4 more sources