Results 81 to 90 of about 144,375 (218)

First Detection of CO Isotopologues in a High-redshift Main-sequence Galaxy: Evidence of a Top-heavy Stellar Initial Mass Function

The Astrophysical Journal
Recent observations and theories have presented a strong challenge to the universality of the stellar initial mass function (IMF) in extreme environments. A notable example has been found for starburst conditions, where evidence favors a top-heavy IMF, i.
Ziyi Guo, Zhi-Yu Zhang, Zhiqiang Yan, Eda Gjergo, Allison W. S. Man, R. J. Ivison, Xiaoting Fu, Yong Shi   +7 more
doaj   +1 more source

SQuIGG E: Buried Star Formation Cannot Explain the Rapidly Fading CO(2–1) Luminosity in Massive, z ∼ 0.7 Post-starburst Galaxies

The Astronomical Journal
Observational and theoretical studies have long held that rapid gas consumption in starbursts is responsible for the formation of the most massive quiescent galaxies at high redshift.
David J. Setton, Justin S. Spilker, Rachel Bezanson, Katherine A. Suess, Jenny E. Greene, Andy D. Goulding, Elia Cenci, Vincenzo R. D’Onofrio, Robert Feldmann, Mariska Kriek, Anika Kumar, Yuanze Luo, Desika Narayanan, Margaret E. Verrico, Pengpei Zhu   +14 more
doaj   +1 more source

Dating Starburst and Post-Starburst Galaxies

, 1999
Contribution to the workshop "Spectrophotometric Dating of Stars and Galaxies" Annapolis Maryland, 25-29 April ...
openaire   +2 more sources

Unveiling the evolutionary history of local post-starburst galaxies through careful Bayesian modelling of their spectra

When we gaze upon the night sky into the stars in the Milky Way, it seems that the cosmos is constant, at least in the timescale of a lifetime. However, as our telescopes continued to improve, we have discovered that galaxies are instead dynamic systems,
Leung, Ho-Hin
core   +1 more source

Starburst models of merging galaxies [PDF]

, 1993
In the past decade, infrared observations have shown that interacting and merging galaxies have higher luminosities than isolated systems, with the luminosities in mergers as high as 10(exp 12) solar luminosity.
Prestwich, Andrea H.
core  

Revisiting the Gas Dynamics of Henize 2–10: Possible Drivers of the Starburst

The Astrophysical Journal
The triggers of starburst episodes are a key component to our understanding of the baryon cycle in galaxies. Galaxy mergers are a commonly suggested catalyst for starbursts, but once the galaxies coalesce into a single kinematically disturbed system ...
Josephine M. Dalsin, Allison H. Costa, Remy Indebetouw, Kelsey E. Johnson, Natalie O. Butterfield, Sabrina Stierwalt   +5 more
doaj   +1 more source

An automated polarimeter and its use in the study of active galaxies [PDF]

, 1996
In this thesis I present the design and development of an automated polarimeter for use in mapping the percentage levels and position angles of linearly polarized light from extended astronomical objects.
Stockdale, D.P., Stockdale, D.
core  

SO in starburst galaxies

The Astrophysical Journal, 1992
The use of SO and SO2 as probes of the dense interstellar medium in the nearby starburst galaxies NGC 253 and M82 is described. Emission in the 99.3 GHz 3(2) - 2(1) rotational transition of SO was detected in NGC 253 and possibly in M82, and upper limits are reported for emission in the 219.9 GHz 6(5) - 5(4) transition of SO and two lines of SO2.
S. J. Petuchowski, C. L. Bennett
openaire   +1 more source

The Calibration of Polycyclic Aromatic Hydrocarbon Dust Emission as a Star Formation Rate Indicator in the AKARI NEP Survey

The Astrophysical Journal
Polycyclic aromatic hydrocarbon (PAH) dust emission has been proposed as an effective extinction-independent star formation rate (SFR) indicator in the mid-infrared, but this may depend on conditions in the interstellar medium.
Helen Kyung Kim, Matthew A. Malkan, Toshinobu Takagi, Nagisa Oi, Denis Burgarella, Takamitsu Miyaji, Hyunjin Shim, Hideo Matsuhara, Tomotsugu Goto, Yoichi Ohyama, Veronique Buat, Seong Jin Kim   +11 more
doaj   +1 more source

Equivalent width Measurements in Optical Spectra of Galaxies in Local Clusters: Hints On the Star Formation History in Clusters

Open Astronomy, 2011
Equivalent widths of spectral lines in the optical spectra of galaxies are commonly used to characterize their stellar populations and to get some insight on their evolution.
Fritz Jacopo, Poggianti Bianca M., Cava Antonio, Moretti Alessia   +3 more
doaj   +1 more source