Results 31 to 40 of about 1,376 (227)

Origins of Molecular Clouds in Early-type Galaxies [PDF]

The Astrophysical Journal, 2019
Abstract We analyze Chandra observations of the hot atmospheres of 40 early spiral and elliptical galaxies. Using new temperature, density, cooling time, and mass profiles, we explore relationships between their hot atmospheres and cold molecular gas.
Iu. V. Babyk, B. R. McNamara, P. D. Tamhane, P. E. J. Nulsen, H. R. Russell, A. C. Edge   +5 more
openaire   +3 more sources

On the shape of the light profiles of early-type galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 1993
We have obtained the best fit to the light profiles of a luminosity limited sample of elliptical and S0 galaxies with a power law \rn, letting the exponent remain free rather than keeping it fixed at $1/n=1/4$ as in the well known \GV formula. The introduction of a free parameter in the fitting formula (ranging from $n=0.5$ for $=0.3$ kpc to $n=16$ for
CAON N., CAPACCIOLI M., D'ONOFRIO, MAURO
openaire   +4 more sources

CARBON AND NITROGEN ABUNDANCES IN EARLY-TYPE GALAXIES [PDF]

The Astrophysical Journal, 2009
For the first time, we undertake a systematic examination of the nitrogen abundances for a sample of 35 early-type galaxies spanning a range of masses and local environment. The nitrogen-sensitive molecular feature at 3360Åhas been employed in conjunction with a suite of atomic- and molecular-sensitive indices to provide unique and definitive ...
Toloba, E., Sánchez Blázquez, Patricia, Gorgas García, Francisco Javier, Gibson, B. K.   +3 more
openaire   +3 more sources

Hot Gaseous Halos in Early Type Galaxies

Galaxies, 2017
The hot gas in early type galaxies (ETGs) plays a crucial role in their formation and evolution. As the hot gas is often extended to the outskirts beyond the optical size, the large scale structural features identified by Chandra (including cavities ...
Dong-Woo Kim
doaj   +1 more source

CLEAR: Survey Overview, Data Analysis, and Products

The Astrophysical Journal Supplement Series, 2023
We present an overview of the CANDELS Ly α Emission At Reionization (CLEAR) survey. CLEAR is a 130 orbit program of the Hubble Space Telescope using the Wide Field Camera 3 (WFC3) IR G102 grism.
Raymond C. Simons, Casey Papovich, Ivelina G. Momcheva, Gabriel Brammer, Vicente Estrada-Carpenter, Steven L. Finkelstein, Catherine M. Gosmeyer, Jasleen Matharu, Jonathan R. Trump, Bren E. Backhaus, Yingjie Cheng, Nikko J. Cleri, Henry C. Ferguson, Kristian Finlator, Mauro Giavalisco, Zhiyuan Ji, Intae Jung, Jennifer M. Lotz, Rosalia O’Brien, Rosalind E. Skelton, Vithal Tilvi, Benjamin Weiner   +21 more
doaj   +1 more source

Morphological Distribution of Galaxies in Some Nearby Clusters

Open Astronomy, 2019
We study the morphological distribution of galaxies in some nearby clusters, using the Sloan Digital Sky Survey – Data Release 9 (SDSS-DR9). The segregation between early-type galaxies and late-type ones is investigated in g – r / u – g color space ...
Rasheed Mariwan A., Mohammad Khalid K.
doaj   +1 more source

Age-density relation of Main galaxies at fixed parameters or for different galaxy families

Open Physics, 2015
Using two volume-limited Main galaxy samples of the Sloan Digital Sky Survey Data Release 10 (SDSS DR10), we examine the environmental dependence of galaxy age at fixed parameters or for different galaxy families.
Deng Xin-Fa, Song Jun, Chen Yi-Qing, Jiang Peng, Ding Ying-Ping   +4 more
doaj   +1 more source

The Initial Mass Function and Other Stellar Properties Across the Core of the Hydra I Cluster

The Astrophysical Journal, 2023
The Hydra I cluster offers an excellent opportunity to study and compare the relic old stellar populations in the core of its two brightest galaxies. In addition, the differing kinematics of the two galaxies allows a test of the local validity of general
Ilaria Lonoce, W. L. Freedman, A. Feldmeier-Krause   +2 more
doaj   +1 more source

Feedback Processes in Early‐Type Galaxies

The Astrophysical Journal, 2002
We present a phenomenological model of feedback in early-type galaxies that tracks the evolution of the interstellar medium gas mass, metallicity, and temperature. Modeling the star formation rate as a Schmidt law with a temperature-dependent efficiency, we find that intermittent episodes of star formation are common in moderate-size ellipticals.
Ferreras, I, Scannapieco, E, Silk, J
openaire   +4 more sources

HI in Early-type Galaxies [PDF]

Publications of the Astronomical Society of Australia, 1999
AbstractWe summarise the HI properties of early-type galaxies, in particular the differences in HI morphologies observed in early-type galaxies of different luminosities. We find that in low-luminosity early-type galaxies the HI is almost always in a disk-like structure, with central surface densities high enough for star formation to occur.
Oosterloo, T., Morganti, R., Sadler, E. M.   +2 more
openaire   +3 more sources