Results 61 to 70 of about 563 (166)

Star formation histories of dwarf lenticular galaxies

Monthly Notices of the Royal Astronomical Society
ABSTRACT Star formation histories (SFHs) are essential for understanding galaxy formation and evolution. We present the mean SFHs of 148 dwarf lenticular galaxies (dS0s) derived from the Sloan Digital Sky Survey spectra. These SFHs reveal two distinct periods of active star formation. The first period, concluding approximately 6 Gyr ago,
Hong Bae Ann, Mira Seo
openaire   +2 more sources

Age and metallicity of the bulges in lenticular galaxies [PDF]

Proceedings of the International Astronomical Union, 2007
AbstractPanoramic spectroscopy of the sample of 80 nearby lenticular galaxies is presented. The SSP-equivalent ages, [Z/H], and [Mg/Fe] are determined through the Lick indices Hβ, Mgb, and 〈Fe〉 separately for the nuclei and for the bulges. About a half of the sample contain chemically distinct nuclei, more metal-rich and younger than the bulges.
openaire   +2 more sources

Simulating molecular cloud regulated star formation in Galaxies [PDF]

, 2007
This thesis is primarily concerned with understanding the process of galaxy formation via the simulation of the interstellar medium, star formation and supernova feedback.
Booth, Craig Martin
core  

Spectroscopic Study of Globular and Fuzzy Clusters in Lenticular Galaxy NGC 1023

The Astrophysical Journal
We here report the results from spectroscopic observations of a sample of 26 globular cluster (GC) and 21 faint fuzzy (FF) candidates in the lenticular galaxy NGC 1023 using the 10.4 m Gran Telescopio Canarias.
M. A. López-Santamaría, Y. D. Mayya, Luis Lomelí-Núñez, L. H. Rodríguez-Merino, Jairo A. Alzate, Arianna Cortesi, P. A. Ovando, D. Rosa-González   +7 more
doaj   +1 more source

Distribution and Motions of Atomic Hydrogen in Lenticular Galaxies [PDF]

Symposium - International Astronomical Union, 1983
We report the results of HI observations of eleven gas-rich SO/SOa galaxies with the Westerbork Synthesis Telescope. The majority of these galaxies have most of their hydrogen outside the optical body, in annular configurations with diameters ~2 times the optical. These outer gas rings are often clumped, incomplete, and in approximately circular motion.
Hugo van Woerden, Wim van Driel, Ulrich J. Schwarz   +2 more
openaire   +1 more source

Evidence for Mass-dependent Evolution of Transitional Dwarf Galaxies in the Virgo Cluster

The Astrophysical Journal
The presence of transitional dwarf galaxies in cluster environments supports the hypothesis that infalling star-forming galaxies are transformed into quiescent early-type dwarf galaxies (ETdGs) through environmental effects.
Suk Kim, Soo-Chang Rey, Youngdae Lee
doaj   +1 more source

Abundant Molecular Gas in the Central Region of Lenticular Galaxy PGC 39535

The Astrophysical Journal
Lenticular galaxies (S0s) in the local Universe are generally absent of recent star formation and lack molecular gas. In this paper, we investigate one massive ( M _* ∼ 5 × 10 ^10 M _⊙ ) star-forming S0, PGC 39535, with the Northern Extended Millimeter ...
Jiantong Cui, Qiusheng Gu, Shiying Lu, Zhengyi Chen, Can Xu, Zeyu Gao   +5 more
doaj   +1 more source

SDSS. IV. MaNGA: The Impact of the Acquisition of Gas with Opposite Angular Momentum on the Evolution of Galaxies

The Astronomical Journal
A gaseous counterrotating galaxy is a galaxy containing a gas component with opposite angular momentum to the main stellar disk. The counterrotating gas provides direct evidence for the accretion of external material, a key aspect in hierarchical galaxy ...
Minje Beom, René A. M. Walterbos, Dmitry Bizyaev   +2 more
doaj   +1 more source

S-PLUS: LEnticular Galaxies in Stripe 82

, 2021
This work is a Brazilian-Indian collaboration. It aims at investigating the structuralproperties of Lenticular galaxies in the Stripe 82 using a combination of S-PLUS (Southern Photometric Local Universe Survey) and SDSS data. S-PLUS is a noveloptical multi-wavelength survey which will cover nearly 8000 square degrees of the Southern hemisphere in the ...
Cortesi, A., Saha, K., Ferrari, F., Lucatelli, G., de Oliveira, C. Mendes, Dhiwar, S., Bom, C. R., Dias, L. O.   +7 more
openaire   +2 more sources

Radio Jet Feedback on the Inner Disk of Virgo Spiral Galaxy Messier 58

The Astrophysical Journal
Spitzer spectral maps reveal a disk of highly luminous, warm (>150 K) H _2 in the center of the massive spiral galaxy Messier 58, which hosts a radio-loud active galactic nucleus (AGN). The inner 2.6 kpc of the galaxy appears to be overrun by shocks from
Patrick M. Ogle, Iván E. López, Victoria Reynaldi, Aditya Togi, R. Michael Rich, Javier Román, Osmin Caceres, Zhuofu (Chester) Li, Grant Donnelly, J. D. T. Smith, Philip N. Appleton, Lauranne Lanz   +11 more
doaj   +1 more source