Showing 21 - 40 results of 80 for search '"star formation"', query time: 0.05s Refine Results
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    The First Galaxies and the Likely Discovery of Their Fossils in the Local Group by Massimo Ricotti

    Published 2010-01-01
    “…It is widely believed that reionization stopped star formation in fossil dwarfs. However, here we dispute this idea and discuss a physical mechanism whereby recent episodes of star formation would be produced in some fossil dwarfs that, hence, may characterized by a bimodal star formation history. …”
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  10. 30

    The Arizona Molecular ISM Survey with the SMT: Variations in the CO(2–1)/CO(1–0) Line Ratio across the Galaxy Population by Ryan P. Keenan, Daniel P. Marrone, Garrett K. Keating

    Published 2025-01-01
    “…We find strong trends between r _21 and SFR, SFR surface density, star formation efficiency, and distance from the star formation main sequence (SFMS). …”
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  11. 31

    BST1047+1156: A (Failing) Ultradiffuse Tidal Dwarf in the Leo I Group by J. Christopher Mihos, Patrick R. Durrell, Aaron E. Watkins, Stacy S. McGaugh, John Feldmeier

    Published 2024-01-01
    “…While our imaging reaches approximately two magnitudes below the tip of the red giant branch at the Leo I distance of 11 Mpc, we find no evidence for an old red giant sequence that would signal an extended star formation history for the object. Instead, we clearly detect the red and blue helium-burning sequences of its stellar populations, as well as the fainter blue main sequence, all indicative of a recent burst of star formation having taken place over the past 50–250 Myr. …”
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  12. 32

    Blowing Out the Candle: How to Quench Galaxies at High Redshift—An Ensemble of Rapid Starbursts, AGN Feedback, and Environment by Lucas C. Kimmig, Rhea-Silvia Remus, Benjamin Seidel, Lucas M. Valenzuela, Klaus Dolag, Andreas Burkert

    Published 2025-01-01
    “…We find that these galaxies are quenched through a rapid burst of star formation and subsequent active galactic nucleus (AGN) feedback caused by a particularly isotropic collapse of surrounding gas, occurring on timescales of around 200 Myr or shorter. …”
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  13. 33

    The Effect of Galaxy Interactions on Starbursts in Milky Way-mass Galaxies in FIRE Simulations by Fei Li, Mubdi Rahman, Norman Murray, Dušan Kereš, Andrew Wetzel, Claude-André Faucher-Giguère, Philip F. Hopkins, Jorge Moreno

    Published 2025-01-01
    “…Simulations and observations suggest that galaxy interactions may enhance the star formation rate (SFR) in merging galaxies. One proposed mechanism is the torque exerted on the gas and stars in the larger galaxy by the smaller galaxy. …”
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  14. 34

    Ejective Feedback as a Quenching Mechanism in the First 1.5 Billion Years of the Universe: Detection of Neutral Gas Outflow in a z = 4 Recently Quenched Galaxy by Po-Feng Wu

    Published 2025-01-01
    “…Based on James Webb Space Telescope spectrum, the star formation rate (SFR) of this has been declining with a rapid e -folding timescale of ∼50 Myr. …”
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  15. 35

    cogsworth: A Gala of COSMIC Proportions Combining Binary Stellar Evolution and Galactic Dynamics by Tom Wagg, Katelyn Breivik, Mathieu Renzo, Adrian M. Price-Whelan

    Published 2025-01-01
    “…It supports postprocessing hydrodynamical zoom-in simulations for more realistic galactic potentials and star formation histories, accounting for initial spatial stellar clustering and complex potentials. …”
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  16. 36

    The Prevalence of Star-forming Clumps as a Function of Environmental Overdensity in Local Galaxies by Dominic Adams, Hugh Dickinson, Lucy Fortson, Kameswara Mantha, Vihang Mehta, Jürgen Popp, Claudia Scarlata, Chris Lintott, Brooke Simmons, Mike Walmsley

    Published 2025-01-01
    “…At the peak of cosmic star formation (1 ≲ z ≲ 2), the majority of star-forming galaxies hosted compact, star-forming clumps, which were responsible for a large fraction of cosmic star formation. …”
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  17. 37

    Star-forming Nuclear Clusters in Dwarf Galaxies Mimicking Active Galactic Nucleus Signatures in the Mid-infrared by Megan R. Sturm, Bayli Hayes, Amy E. Reines

    Published 2025-01-01
    “…Our results indicate that these galactic nuclei have ongoing star formation, are still at least partially obscured by clouds of gas and dust, and are most likely producing the extremely red AGN-like mid-IR colors. …”
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  18. 38

    Galaxy Evolution in a Pilot Survey up to z=1 and CDM Halos by E. Giraud, J. Melnick, Q.-S. Gu, H. Quintana, F. Selman, I. Toledo, P. Zelaya

    Published 2011-01-01
    “…Our observations indicate that at z⩽1 star formation and hierarchical structure formation of CDM halos are not in phase.…”
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    Improved SED-fitting Assumptions Result in Inside-out Quenching at z ~ 0.5 and Quenching at All Radii Simultaneously at z ~ 1 by Alexander de la Vega, Susan A. Kassin, Camilla Pacifici, Stéphane Charlot, Emma Curtis-Lake, Jacopo Chevallard, Timothy M. Heckman, Anton M. Koekemoer, Weichen Wang

    Published 2025-01-01
    “…Many studies conclude that galaxies quench from the inside-out by examining profiles of specific star formation rate (sSFR). These are usually measured by fitting spectral energy distributions (SEDs) assuming a fixed dust law and uniform priors on all parameters. …”
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    Multiepoch Observations of the Nearby Spiral Galaxy NGC 3938 with the Chandra X-Ray Observatory by Siddhi Raut, Eric M. Schlegel, Thomas G. Pannuti, Brannon W. Jones, Jacobo Matallana

    Published 2025-01-01
    “…The luminosity function of NGC 3938 is compared to a recent compilation of 38 galaxies, and we identify a potentially significant problem with the “known” distance to NGC 3938. Star formation rate and metallicity values are also computed; the star formation rate is highly dependent on the adopted distance. …”
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