On the (U-B) Color Indices and Hydrogen Line Strengths of Elliptical Galaxies

1973 ◽  
Vol 85 ◽  
pp. 286 ◽  
Author(s):  
Paul W. Hodge
Keyword(s):  
Elliptical Galaxies ◽  
Hydrogen Line ◽  
Color Indices ◽  
Line Strengths

scholarly journals S0 Galaxy Line Strengths and Gradients

1996 ◽  
Vol 171 ◽  
pp. 374-374
Author(s):  
David Fisher ◽  
Marijn Franx ◽  
Garth Illingworth
Keyword(s):  
Stellar Populations ◽  
Elliptical Galaxies ◽  
S0 Galaxies ◽  
Line Strengths

Line strengths and their gradients in Mg, Fe, and Hβ have been determined for a sample of 20 S0 galaxies in order to study the stellar populations of their bulges and disks and to investigate their relationship to elliptical galaxies. The data were obtained with the Lick Observatory 3m telescope in the long-slit mode over the region 4215–5615 Å with resolution 3.1 Å.

Correlations between line strengths and fine structure in elliptical galaxies

1990 ◽  
Vol 364 ◽  
pp. L33 ◽  
Author(s):  
Francois Schweizer ◽  
Patrick Seitzer ◽  
S. M. Faber ◽  
David Burstein ◽  
Cristina M. Dalle Ore ◽  
...  
Keyword(s):  
Fine Structure ◽  
Elliptical Galaxies ◽  
Line Strengths

scholarly journals Gradients of Absorption‐Line Strengths in Elliptical Galaxies

1999 ◽  
Vol 527 (2) ◽  
pp. 573-599 ◽  
Author(s):  
Chiaki Kobayashi ◽  
Nobuo Arimoto
Keyword(s):  
Absorption Line ◽  
Elliptical Galaxies ◽  
Line Strengths

Hydrogen line strengths in degenerate stars. II

1979 ◽  
Vol 231 ◽  
pp. 491
Author(s):  
J. L. Greenstein ◽  
G. Vauclair
Keyword(s):  
Hydrogen Line ◽  
Line Strengths

scholarly journals Observations across nearby spiral bulges

2007 ◽  
Vol 3 (S245) ◽  
pp. 141-142
Author(s):  
A. E. Sansom ◽  
S. I. Loubser ◽  
P. Sánchez-Blázquez ◽  
I. K. Söchting
Keyword(s):  
Stellar Population ◽  
Spiral Galaxies ◽  
Elliptical Galaxies ◽  
High Signal ◽  
Formation Mechanisms ◽  
Signal To Noise ◽  
Preliminary Results ◽  
Formation History ◽  
Larger Sample ◽  
Line Strengths

AbstractThe bulges of spiral galaxies may be old, as in our Galaxy, or may possess younger stars, as evidenced in spectroscopic line strengths in some external bulges. Bulges look similar to elliptical galaxies, but their formation history is expected to differ due to the presence of the disc and different formation mechanisms. This project extends the numbers of high signal-to-noise, broad coverage spectra to a larger sample of bulges in order to test conflicting ideas about their age distributions. New Gemini long-slit observations will be used to derive stellar population ages and histories across 30 bulges. Here we present preliminary results from the sample.

scholarly journals NaD excess objects and its implications on initial mass function

2014 ◽  
Vol 10 (S311) ◽  
pp. 69-71
Author(s):  
Sukyoung K. Yi ◽  
Hyunjin Jeong
Keyword(s):  
Mass Function ◽  
Elliptical Galaxies ◽  
Initial Mass Function ◽  
Initial Mass ◽  
Line Strengths

Abstractvan Dokkum and Conroy (2010) have heralded the possible implication of NaI 8200A lines on extra bottom-heavy IMF of bright elliptical galaxies. A flurry of papers have followed it and revisited the half a century old issue all over again from various angles. For a sanity check, we investigate on the issue this time using the better measured NaD 5900A line instead. We found from the SDSS database that a large (~ 10%) fraction of galaxies (both early and late types) exhibit strong NaD lines and that the same bottom-heavy models of van Dokkum and Conroy that reproduced the strong NaI 8200 lines of elliptical galaxies are not capable of reproducing NaD line strengths at all. The mystery prevails. This article is mainly a review of our recent paper (Jeong et al. 2013).

Hydrogen line profiles at low densities

1984 ◽  
Vol 9 (4) ◽  
pp. 697-704 ◽  
Author(s):  
C. Stehlé ◽  
N. Feautrier
Keyword(s):  
Line Profiles ◽  
Hydrogen Line

Translocations In Space-Time and Simultaneous States of the Universe: Convergent Quantifications and Alternative Solutions from the Principles of Physics for the Challenges of “Time Travel” and “Parallel Universes”

2016 ◽  
pp. 4058-4069
Author(s):  
Michael A Persinger
Keyword(s):  
Single Photon ◽  
Rest Mass ◽  
Space Time ◽  
Hydrogen Line ◽  
Magnetic Forces ◽  
Universal Space ◽  
Potential Applications ◽  
Order Of Magnitude ◽  
Alternative Solutions ◽  
The Universe

                                Translation of four dimensional axes anywhere within the spatial and temporal boundaries of the universe would require quantitative values from convergence between parameters that reflect these limits. The presence of entanglement and volumetric velocities indicates that the initiating energy for displacement and transposition of axes would be within the upper limit of the rest mass of a single photon which is the same order of magnitude as a macroscopic Hamiltonian of the modified Schrödinger wave function. The representative metaphor is that any local 4-D geometry, rather than displaying restricted movement through Minkowskian space, would instead expand to the total universal space-time volume before re-converging into another location where it would be subject to cause-effect. Within this transient context the contributions from the anisotropic features of entropy and the laws of thermodynamics would be minimal.  The central operation of a fundamental unit of 10-20 J, the hydrogen line frequency, and the Bohr orbital time for ground state electrons would be required for the relocalized manifestation. Similar quantified convergence occurs for the ~1012 parallel states within space per Planck’s time which solve for phase-shift increments where Casimir and magnetic forces intersect.  Experimental support for these interpretations and potential applications is considered. The multiple, convergent solutions of basic universal quantities suggest that translations of spatial axes into adjacent spatial states and the transposition of four dimensional configurations any where and any time within the universe may be accessed but would require alternative perspectives and technologies.

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