Results 31 to 40 of about 114,760 (309)

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

Dark matter mass loss in galaxy flybys: dependence on impact parameter [PDF]

Serbian Astronomical Journal, 2022
Galaxy flybys, interactions where two independent halos inter-penetrate but detach at a later time and do not merge, occur frequently at lower redshifts.
Mitrašinović A.
doaj   +1 more source

Evidence for Ultra-diffuse Galaxy “Formation” through Galaxy Interactions [PDF]

The Astrophysical Journal Letters, 2018
Abstract We report the discovery of two ultra-diffuse galaxies (UDGs) that show clear evidence of an association with tidal material and an interaction with a larger galaxy halo, found during a search of the Wide portion of the Canada–France–Hawaii Telescope Legacy Survey. The two new UDGs, NGC 2708-Dw1 and NGC 5631-Dw1, are faint (M
P. Bennet, D. J. Sand, D. Zaritsky, D. Crnojević, K. Spekkens, A. Karunakaran   +5 more
openaire   +2 more sources

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

A Bayesian approach to the semi-analytic model of galaxy formation: methodology [PDF]

, 2010
We believe that a wide range of physical processes conspire to shape the observed galaxy population but we remain unsure of their detailed interactions.
Avila Reese, Avila Reese, Baldry, Bell, Benson, Benson, Benson, Bertschinger, Bett, Bigiel, Binney, Bond, Bower, Bower, Bruzual, Bullock, Bullock, Cattaneo, Cole, Cole, Croton, De Lucia, Dunkley, Dutton, Dutton, Efstathiou, Fardal, Fillmore, Firmani, Fontanot, Fu, Gelman, Green, Gunn, H. J. Mo, Henriques, Kampakoglou, Kang, Katz, Kauffmann, Kauffmann, Kennicutt, Kennicutt, Kereš, Kimm, Komatsu, Krumholz, Lacey, Liu, Lu, Lu, Macciò, Martin, Martin D. Weinberg, Mckay, Mo, Mo, Navarro, Navarro, Navarro, Neal, Neal Katz, Neistein, Oppenheimer, Parkinson, Press, Primack, Primack, Sheth, Simha, Somerville, Somerville, Somerville, Springel, Sutherland, Ter Braak, van den Bosch, Warren, Weinmann, White, White, Yu Lu, Zhao, Zhao, Zhao   +84 more
core   +3 more sources

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

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 And Mass Assembly (GAMA): growing up in a bad neighbourhood - how do low-mass galaxies become passive? [PDF]

, 2015
Both theoretical predictions and observations of the very nearby Universe suggest that low-mass galaxies (log$_{10}$[M$_{*}$/M$_{\odot}$]
Alpaslan, M., Baldry, I. K., Bland-Hawthorn, J., Brough, S., Brown, M. J. I., Cluver, M. E., Davies, L. J. M., Driver, S. P., Holwerda, B. W., Hopkins, A. M., Lara-Lopez, M. A., Mahajan, S., Moffett, A. J., Owers, M. S., Phillipps, S., Robotham, A. S. G.   +15 more
core   +4 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