Results 21 to 30 of about 113,929 (193)

FAST Reveals New Evidence for M94 as a Merger

The Astrophysical Journal, 2023
We report the first high-sensitivity H i observation toward the spiral galaxy M94 with the Five-hundred-meter Aperture Spherical radio Telescope. From these observations, we discovered that M94 has a very extended H i disk, twice larger than that ...
Ruilei Zhou, Ming Zhu, Yanbin Yang, Haiyang Yu, Lixia Yuan, Peng Jiang, Wenzhe Xi   +6 more
doaj   +1 more source

Forming Young Bulges within Existing Disks: Statistical Evidence for External Drivers

, 2003
Contrary to traditional models of galaxy formation, recent observations suggest that some bulges form within preexisting disk galaxies. Such late-epoch bulge formation within disks seems to be linked to disk gas inflow and central star formation, caused ...
Abraham R. G., Andredakis Y. C., Becker R. H., Elizabeth J. Barton, Ellis R. S., Friedli D., Kauffmann G., Rolf A. Jansen, Schwarzkopf U., Sheila J. Kannappan, Shioya Y., Tully R. B.   +11 more
core   +1 more source

Galaxy pairs in the Sloan Digital Sky Survey - XII: The fuelling mechanism of low excitation radio-loud AGN [PDF]

, 2015
We investigate whether the fuelling of low excitation radio galaxies (LERGs) is linked to major galaxy interactions. Our study utilizes a sample of 10,800 spectroscopic galaxy pairs and 97 post-mergers selected from the Sloan Digital Sky Survey with ...
Ellison, Sara L., Hickox, Ryan C., Patton, David R.   +2 more
core   +3 more sources

Dark matter and generation of galactic magnetic fields [PDF]

, 2013
A new scenario for creation of galactic magnetic fields is proposed which is operative at the cosmological epoch of the galaxy formation, and which relies on unconventional properties of dark matter. Namely, it requires existence of feeble but long range
Berezhiani, Zurab, Dolgov, A. D., Tkachev, I. I.   +2 more
core   +2 more sources

On the frequency, intensity and duration of starburst episodes triggered by galaxy interactions and mergers

, 2008
We investigate the intensity enhancement and the duration of starburst episodes, triggered by major galaxy interactions and mergers. To this aim, we analyze two large statistical datasets of numerical simulations.
A.-L. Melchior, Arp, Avila-Reese, Avila-Reese, B. Semelin, Barnes, Barnes, Barnes, Barnes, Bell, Bergvall, Boissier, Bournaud, Bournaud, Bournaud, Bournaud, Bournaud, Bridge, Charmandaris, Cole, Combes, Conselice, Cox, Daddi, Daddi, Daddi, de Blok, de Blok, de Grijs, Di Matteo, Diemand, Duc, Duc, Elbaz, Elmegreen, Elmegreen, Elmegreen, Evrard, F. Bournaud, F. Combes, Flores, Förster Schreiber, Gao, Gentile, Genzel, Georgakakis, Giallongo, Gingold, Hernquist, Hernquist, Hernquist, James, Kapferer, Katz, Kennicutt, Kennicutt, Kuzio de Naray, Kuzio de Naray, Larson, Lucy, M. Martig, Mao, Marchesini, Martig, McGaugh, Mihos, Mihos, Mihos, Mihos, Mihos, Navarro, Navarro, P. Di Matteo, Sanders, Semelin, Shapiro, Silk, Springel, Springel, Springel, Springel, Steinmetz, Struck, Swaters, Tacconi, Thacker, van den Bosch, van den Bosch, Walter, Wang, Weedman, Wong   +91 more
core   +3 more sources

Combined Effects of Galaxy Interactions and Large-Scale Environment on Galaxy Properties

, 2008
We inspect the coupled dependence of physical parameters of the SDSS galaxies on the small-scale (distance to and morphology of the nearest neighbor galaxy) and the large-scale (background density smoothed over 20 nearby galaxies) environments.
Adelman-McCarthy, Allam, Balogh, Barnes, Barton, Barton, Barton, Bell, Binney, Blanton, Blanton, Blanton, Blanton, Brighenti, Brown, Brown, Changbom Park, Choi, Conroy, Coziol, D'Onghia, de Propris, Ellison, Evrard, Geller, Gomez, Gott, Graham, Henriksen, Hernandez-Toledo, Hogg, Jeltema, Kacprzak, Kim, Li, Maller, Matsushita, Mendes de Oliveira, Naab, Park, Park, Park, Park, Patton, Patton, Poggianti, Prada, Quintero, Robertson, Schlegel, Smith, Tanaka, Tegmark, Tran, Tully, Ulmer, van den Bergh, van der Wel, van Dokkum, Woods, Woods, Yang, York, Yun-Young Choi   +63 more
core   +1 more source

The Effect of Galaxy Interactions on Starbursts in Milky Way-mass Galaxies in FIRE Simulations

The Astrophysical Journal
Simulations and observations suggest that galaxy interactions may enhance the star formation rate (SFR) in merging galaxies. One proposed mechanism is the torque exerted on the gas and stars in the larger galaxy by the smaller galaxy.
Fei Li, Mubdi Rahman, Norman Murray, Dušan Kereš, Andrew Wetzel, Claude-André Faucher-Giguère, Philip F. Hopkins, Jorge Moreno   +7 more
doaj   +1 more source

The Progenitor of the Peculiar Galaxy NGC 3077

The Astrophysical Journal, 2023
We present a study of the structural properties and metallicity distribution of the nearby peculiar galaxy NGC 3077. Using data from our survey of the M81 Group with the Hyper Suprime-Cam on board the Subaru Telescope, we construct deep color–magnitude ...
Sakurako Okamoto, Nobuo Arimoto, Annette M. N. Ferguson, Mike J. Irwin, Rokas Žemaitis   +4 more
doaj   +1 more source

Scale Interactions and Galaxy Evolution [PDF]

Astrophysics and Space Science, 2003
To understand galaxies and their evolution, it is necessary to describe how the different scales interact: how the microscopic physics, such as star formation, or the large scale physics, such as galaxy interactions may modify the galaxy global shapes.
openaire   +2 more sources

Galactic PeV Neutrinos

, 2013
IceCube experiment has detected two neutrinos with energies beween 1-10 PeV. They might have originated from Galactic or extragalactic sources of cosmic rays.
Gupta, Nayantara
core   +1 more source