Results 61 to 70 of about 507,375 (292)

Cold gas in elliptical galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2001
We explore the evolution of the cold gas (molecular and neutral hydrogen) of elliptical galaxies and merger remnants ordered into a time sequence on the basis of spectroscopic age estimates. We find that the fraction of cold gas in early merger remnants decreases significantly for ~1-2Gyr, but subsequent evolution toward evolved elliptical systems sees
Georgakakis, Antonis, Hopkins, A. M., Caulton, A., Wiklind, T., Terlevich, A. I., Forbes, Duncan A.   +5 more
openaire   +5 more sources

THE DARK HALO—SPHEROID CONSPIRACY AND THE ORIGIN OF ELLIPTICAL GALAXIES [PDF]

, 2012
Dynamical modeling and strong-lensing data indicate that the total density profiles of early-type galaxies are close to isothermal, i.e., ρtot∝rγ with γ ≈ −2.
R. Remus, A. Burkert, K. Dolag, P. Johansson, T. Naab, L. Oser, Jens Thomas   +6 more
semanticscholar   +1 more source

Abundance ratios in dwarf elliptical galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2017
We determine abundance ratios of 37 dwarf ellipticals (dEs) in the nearby Virgo cluster. This sample is representative of the early-type population of galaxies in the absolute magnitude range -19.0 < Mr < -16.0. We analyze their absorption line-strength indices by means of index-index diagrams and scaling relations and use the stellar population ...
Jesús Falcón-Barroso, Jesús Falcón-Barroso, S. Sen, S. Sen, Agnieszka Sybilska, Reynier Peletier, Alessandro Boselli, A. Vazdekis, A. Vazdekis, J. J. Mentz, Gerhard Hensler, Cahit Yeşilyaprak, M. den Brok, Joachim Janz, Joachim Janz, Joachim Janz, G. van de Ven, Heikki Salo, Thorsten Lisker, Sanjaya Paudel, Eija Laurikainen, E. Toloba   +21 more
openaire   +10 more sources

The Hubble Sequence in Groups: The Birth of the Early-Type Galaxies [PDF]

, 2010
The physical mechanisms and timescales that determine the morphological signatures and the quenching of star formation of typical (~L*) elliptical galaxies are not well understood.
Carollo, C. M., Feldmann, R., Mayer, L.
core   +2 more sources

The Hβ Index and the Ages of Old Stellar Systems [PDF]

Journal of Astronomy and Space Sciences, 1998
The Hβ and some metal line indices, such as Mg2, Fe52, Fe53 of single-age and single-metallicity populations are computed based on the method of evolutionary population synthesis, with careful consideration of the variation of the horizontal-branch ...
Seok-Jin Yoon, Hyun-Chul Lee, Young-Wook Lee   +2 more
doaj  

Are disk galaxies the progenitors of giant ellipticals? [PDF]

, 2007
A popular formation scenario for giant elliptical galaxies proposes that they might have formed from binary mergers of disk galaxies. Difficulties with the scenario that emerged from earlier studies included providing the necessary stellar mass and ...
Barden, Bell, Bell, Bell, Bender, Bender, Bender, Bender, Binney, Brinchmann, Ciotti, Cox, Côté, Côté, Dasyra, Dasyra, Davies, de Jong, Dehnen, di Serego Alighieri, Ferrarese, Genzel, Gerhard, Gerhard, González-García, Hogg, Hogg, Hopkins, Hopkins, Hopkins, Hubble, Jeremiah P. Ostriker, Jesseit, Johansson, Khochfar, Khochfar, Kormendy, Kriek, Larson, Larson, Larson, Li, McIntosh, Naab, Naab, Naab, Naab, Nagamine, Nakamura, Negroponte, Ostriker, Rix, Robertson, Robertson, Rothberg, Rothberg, Springel, Surma, Thomas, Thorsten Naab, Toomre, Toomre, Treu, Trujillo, Trujillo, van der Wel, van Dokkum, van Dokkum, van Dokkum, White   +69 more
core   +4 more sources

Cosmicflows-4

The Astrophysical Journal, 2023
With Cosmicflows- 4, distances are compiled for 55,877 galaxies gathered into 38,065 groups. Eight methodologies are employed, with the largest numbers coming from the correlations between the photometric and kinematic properties of spiral galaxies (TF ...
R. Brent Tully, Ehsan Kourkchi, Hélène M. Courtois, Gagandeep S. Anand, John P. Blakeslee, Dillon Brout, Thomas de Jaeger, Alexandra Dupuy, Daniel Guinet, Cullan Howlett, Joseph B. Jensen, Daniel Pomarède, Luca Rizzi, David Rubin, Khaled Said, Daniel Scolnic, Benjamin E. Stahl   +16 more
doaj   +1 more source

Equilibrium Figures inside the Dark-Matter Ring and the Shapes of Elliptical Galaxies

Open Astronomy, 2015
We solve the general problem of the theory of equilibrium figures and analyze two classes of liquid rotating gravitating figures residing inside a gravitating ring or torus.
Kondratyev B. P., Trubitsyna N. G., Kireeva E. N.   +2 more
doaj   +1 more source

Resolving the Extended Stellar Halos of Nearby Galaxies: The Wide-Field PISCeS Survey

Galaxies, 2017
The wide-field Panoramic Imaging Survey of Centaurus and Sculptor (PISCeS) investigates the resolved stellar halos of two nearby galaxies (the spiral NGC 253 and the elliptical Centaurus A, D ∼ 4 Mpc) out to a galactocentric radius of 150 kpc ...
Denija Crnojević
doaj   +1 more source

THE ULTRAVIOLET UPTURN IN ELLIPTICAL GALAXIES AND ENVIRONMENTAL EFFECTS [PDF]

, 2011
It is suspected that the ultraviolet (UV) upturn phenomenon in elliptical galaxies and extended horizontal-branch stars in globular clusters have a common origin.
S. Yi, Jihye Lee, Y. Sheen, Hyunjin Jeong, H. Suh, K. Oh   +5 more
semanticscholar   +1 more source