On the Mass of Supernova Progenitors: The Role of the $$^{12}$$ C $$+^{12}$$ C Reaction

Straniero, O.; Piersanti, L.; Dominguez, Inmaculata; Туміно, А.

doi:10.1007/978-3-030-13876-9_2

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…Besides, we confirmed FtsZ as the target of this class of derivatives [29] using a GTPase activity assay and a polymerization activity assay. The two in vitro assays are the ones widely used to investigate changes in FtsZ enzymatic function, as suggested by Kusuma and Tripathy in recent reviews on this topic.…”

Section: Introductionsupporting

confidence: 56%

“…They potently inhibited both methicillin-sensitive and methicillinresistant S. aureus and M. tuberculosis. [27][28][29] Among them, the most interesting derivatives, here called I, II and III, [27,28] showed MIC against MRSA between 0.5 and 0.6 μg/mL (see Figure 2). Morphometric analysis performed on Sa cells incubated with our derivatives showed the typical alterations of cell division inhibition.…”

Section: Introductionmentioning

confidence: 99%

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Benzodioxane‐Benzamides as Antibacterial Agents: Computational and SAR Studies to Evaluate the Influence of the 7‐Substitution in FtsZ Interaction

et al. 2019

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FtsZ is a crucial prokaryotic protein involved in bacterial cell replication. It recently arose as a promising target in the search for antimicrobial agents able to fight antimicrobial resistance. In this work, going on with our structure‐activity relationship (SAR) study, we developed variously 7‐substituted 1,4‐benzodioxane compounds, linked to the 2,6‐difluorobenzamide by a methylenoxy bridge. Compounds exhibit promising antibacterial activities not only against multidrug‐resistant Staphylococcus aureus, but also on mutated Escherichia coli strains, thus enlarging their spectrum of action toward Gram‐negative bacteria as well. Computational studies elucidated, through a validated FtsZ binding protocol, the structural features of new promising derivatives as FtsZ inhibitors.

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Section: Introductionsupporting

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Benzodioxane‐Benzamides as Antibacterial Agents: Computational and SAR Studies to Evaluate the Influence of the 7‐Substitution in FtsZ Interaction

et al. 2019

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“…As a minimal requirement, consistency demands that the SFHs be determined using isochrones derived from the same stellar evolution code used to analyse the impact of ALPs JCAP09(2021)010 (in our case the MIST isochrones). This is further complicated by the dependence of M up and M up on the 12 C+ 12 C reaction rate, which is presently a source of great uncertainty in stellar simulations [93].…”

Section: Jcap09(2021)010mentioning

confidence: 99%

Constraining axion-like particles using the white dwarf initial-final mass relation

Dolan

Hiskens

Volkas

2021

J. Cosmol. Astropart. Phys.

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Axion-like particles (ALPs), a class of pseudoscalars common to many extensions of the Standard Model, have the capacity to drain energy from the interiors of stars. Consequently, stellar evolution can be used to derive many constraints on ALPs. We study the influence that keV-MeV scale ALPs which interact exclusively with photons can exert on the helium-burning shells of asymptotic giant branch stars, the late-life evolutionary phase of stars with initial masses less than 8M . We establish the sensitivity of the final stellar mass to such energy-loss for ALPs with masses currently permitted by stellar evolution bounds. A semi-empirical constraint on the white dwarf initial-final mass relation (IFMR) derived from observation of double white dwarf binaries is then used to exclude part of a currently unconstrained region of ALP parameter space, the cosmological triangle. The derived constraint relaxes when the ALP decay length becomes shorter than the width of the helium-burning shell. Other potential sources for stellar constraints on ALPs are also discussed.

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“…As a minimal requirement, consistency demands that the SFHs be determined using isochrones derived from the same stellar evolution code used to analyse the impact of ALPs (in our case the MIST isochrones). This is further complicated by the dependence of M up and M up on the 12 C+ 12 C reaction rate, which is presently a source of great uncertainty in stellar simulations [92].…”

Section: Beyond the Initial-final Mass Relationmentioning

confidence: 99%

Constraining axion-like particles using the white dwarf initial-final mass relation

Dolan,

Hiskens,

Volkas

2021

Preprint

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Axion-like particles (ALPs), a class of pseudoscalars common to many extensions of the Standard Model, have the capacity to drain energy from the interiors of stars. Consequently, stellar evolution can be used to derive many constraints on ALPs. We study the influence that keV-MeV scale ALPs which interact exclusively with photons can exert on the helium-burning shells of asymptotic giant branch stars, the latelife evolutionary phase of stars with initial masses less than 8M . We establish the sensitivity of the final stellar mass to such energy-loss for ALPs with masses currently permitted by stellar evolution bounds. A semiempirical constraint on the white dwarf initial-final mass relation (IFMR) derived from observation of double white dwarf binaries is then used to exclude part of a currently unconstrained region of ALP parameter space, the cosmological triangle. The derived constraint relaxes when the ALP decay length becomes shorter than the width of the helium-burning shell. Other potential sources for stellar constraints on ALPs are also discussed.

show abstract

On the Mass of Supernova Progenitors: The Role of the $$^{12}$$ C $$+^{12}$$ C Reaction

Cited by 4 publications

References 6 publications

Benzodioxane‐Benzamides as Antibacterial Agents: Computational and SAR Studies to Evaluate the Influence of the 7‐Substitution in FtsZ Interaction

Benzodioxane‐Benzamides as Antibacterial Agents: Computational and SAR Studies to Evaluate the Influence of the 7‐Substitution in FtsZ Interaction

Constraining axion-like particles using the white dwarf initial-final mass relation

Constraining axion-like particles using the white dwarf initial-final mass relation

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