Results 71 to 80 of about 473,820 (316)

The luminosity function of field galaxies

, 2011
Schmidt's method for construction of luminosity function of galaxies is generalized by taking into account the dependence of density of galaxies from the distance in the near Universe.
A Dressler, A Dressler, A Jr, A Sandage, A Sandage, A. P. Mahtessian, AI Zabludoff, ALB Ribeiro, AP Mahtessian, AP Mahtessian, B Binggeli, B Garilli, B Garilli, BC Bromley, BM Garilli, C Marinoni, CA Valotto, CNA Willmer, D Lynden-Bell, DH Gudehus, E Gaidos, G Efstathiou, H Jerjen, H Lin, H Muriel, HC Ferguson, J Choloniewski, J Huchra, J Loveday, JE Felten, JF Nicol, LF Barrientos, M Paolillo, M Ramella, M Schmidt, MA Arakelyan, MJ Cuesta-Bolao, MM Colless, N Trentham, N Trentham, O Lopez-Cruz, O Lopez-Cruz, P Schechter, PM Lugger, RO Marzke, S Andreon, S Andreon, S Rayzy, SE Zepf, SL Lumsden, SP Driver, T Goto, VYu Terebizh, WR Oegerle, WR Oegerle   +54 more
core   +1 more source

Assembling Spiral Galaxies [PDF]

Symposium - International Astronomical Union, 1996
Nearby spiral galaxies offer vital clues to some of the most fundamental questions about galaxy formation and evolution: What is the star formation history of the universe, past and future? When did disks form, during the final stages of a single primeval collapse, or as a continuous or episodic process?
openaire   +2 more sources

ULTRALIGHT SCALARS AND SPIRAL GALAXIES [PDF]

Modern Physics Letters A, 2001
We study some possible astrophysical implications of a very weakly coupled ultralight dilaton-type scalar field. Such a field may develop an (approximately stable) network of domain walls. The domain wall thickness is assumed to be comparable with the thickness of the luminous part of the spiral galaxies. The walls provide trapping for galactic matter.
Gregory Gabadadze, Mikhail A. Shifman, Gia Dvali   +2 more
openaire   +4 more sources

CHARACTERISTICS OF SPIRAL ARMS IN LATE-TYPE GALAXIES [PDF]

, 2014
We have measured the positions of large numbers of H ii regions in four nearly face-on, late-type, spiral galaxies: NGC 628 (M74), NGC 1232, NGC 3184, and NGC 5194 (M51).
Z. N. Honig, M. Reid
semanticscholar   +1 more source

Exploring the evolution of spiral galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2002
We have constructed a family of simple models for spiral galaxy evolution to allow us to investigate observational trends in star formation history with galaxy parameters. The models are used to generate broad band colours from which ages and metallicities are derived in the same way as the data.
Eric F. Bell, Eric F. Bell, Richard G. Bower   +2 more
openaire   +3 more sources

Extragalactic Magnetism with SOFIA (SALSA Legacy Program). V. First Results on the Magnetic Field Orientation of Galaxies

The Astrophysical Journal, 2023
We present the analysis of the magnetic field ( B -field) structure of galaxies measured with far-infrared (FIR) and radio (3 and 6 cm) polarimetric observations.
Alejandro S. Borlaff, Enrique Lopez-Rodriguez, Rainer Beck, Susan E. Clark, Evangelia Ntormousi, Konstantinos Tassis, Sergio Martin-Alvarez, Mehrnoosh Tahani, Daniel A. Dale, Ignacio del Moral-Castro, Julia Roman-Duval, Pamela M. Marcum, John E. Beckman, Kandaswamy Subramanian, Sarah Eftekharzadeh, Leslie Proudfit   +15 more
doaj   +1 more source

The rotation curves shapes of late-type dwarf galaxies [PDF]

, 2008
We present rotation curves derived for a sample of 62 late-type dwarf galaxies that have been observed as part of the Westerbork HI Survey of Spiral and Irregular Galaxies (WHISP) project.
Begeman, Begum, Blais-Ouellette, Bosma, Bosma, Bottema, Broeils, Bullock, Casertano, Catinella, Corradi, Côté, de Blok, de Blok, de Blok, de Blok, Ford, García-Ruiz, Garrido, Hunter, J. M. van der Hulst, Kent, Kent, Kregel, Kuzio de Naray, Marchesini, McGaugh, Navarro, Navarro, Noordermeer, Persic, Persic, Power, Puche, R. A. Swaters, R. Sancisi, Rhee, Rubin, Sancisi, Sicotte, Sicotte, Simon, Spekkens, Spekkens, Swaters, Swaters, Swaters, Swaters, Swaters, Swaters, Swaters, T. S. van Albada, Tully, van den Bosch, van den Bosch, Verheijen   +55 more
core   +2 more sources

THE DISCOVERY OF SEVEN EXTREMELY LOW SURFACE BRIGHTNESS GALAXIES IN THE FIELD OF THE NEARBY SPIRAL GALAXY M101 [PDF]

, 2014
Dwarf satellite galaxies are a key probe of dark matter and of galaxy formation on small scales and of the dark matter halo masses of their central galaxies.
A. Merritt, P. V. van Dokkum, R. Abraham
semanticscholar   +1 more source

Dark Matter in Spiral Galaxies [PDF]

Symposium - International Astronomical Union, 1995
In this review I will concentrate on three questions concerning the issue of dark matter in spiral galaxies. In the first place (and for the most part) I will discuss the analysis of rotation curves and the question whether the “maximum–disk hypothesis” is valid.
openaire   +5 more sources

ON THE FRACTION OF BARRED SPIRAL GALAXIES [PDF]

The Astrophysical Journal, 2010
We investigate the stellar masses of strongly barred spiral galaxies. Our analysis is based on a sample of ~14000 visually-classified nearby galaxies given in Nair & Abraham 2010(a). The fraction of barred spiral galaxies is found to be a strong function of stellar mass and star formation history, with a minimum near the characteristic mass at ...
Preethi Nair, Roberto Abraham
openaire   +4 more sources