#eccentricity : deviation from the customary line of conduct

- French: excentricité

- German: die Exzentrizität

- Italian: eccentricità

- Portuguese: excentricidade

- Spanish: excentricidad

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Word of The Hour's Annual Survey @ https://wordofthehour.org/r/form

Weekly Update from the Open Journal of Astrophysics – 08/11/2025

It’s Saturday again, so it’s time for the usual update of the week’s new papers at the Open Journal of Astrophysics. Since the last update we have published another five papers, which brings the number in Volume 8 (2025) up to 168, and the total so far published by OJAp up to 403.

The first paper this week is “Maximizing Ariel’s Survey Leverage for Population-Level Studies of Exoplanets” by Nicolas B. Cowan and Ben Coull-Neveu (McGill University, Canada). This article was published in the folder Earth and Planetary Astrophysics on Tuesday 4th November 2025; it discusses various different schemes to select the mission reference sample for a notional three year transit spectroscopy survey with the European Space Agency’s Ariel mission

The overlay is here:

You can find the officially accepted version on arXiv here.

The Fediverse announcement is here:

Open Journal of Astrophysics

@OJ_Astro@fediscience.org

New Publication at the Open Journal of Astrophysics: "Maximizing Ariel’s Survey Leverage for Population-Level Studies of Exoplanets" by Nicolas B. Cowan and Ben Coull-Neveu (McGill University, Canada)

https://doi.org/10.33232/001c.146656

The second paper of the week is “A substellar flyby that shaped the orbits of the giant planets” by Garett Brown (U. Toronto at Scarborough, Canada), Renu Malhotra (U. Arizona, USA) and Hanno Rein (U. Toronto at Scarborough, Canada). This article was published on Wednesday 5th November 2025, also in the folder Earth and Planetary Astrophysics. It argues that an ancient close encounter with a substellar object offers a plausible explanation for the origin of the moderate eccentricities and inclinations of the giant planets.

The overlay is here:

You can find the official version of this one on arXiv here. The federated announcement on Mastodon is here:

Open Journal of Astrophysics

@OJ_Astro@fediscience.org

New Publication at the Open Journal of Astrophysics: "A substellar flyby that shaped the orbits of the giant planets" by Garett Brown (U. Toronto at Scarborough, Canada), Renu Malhotra (U. Arizona, USA) and Hanno Rein (U. Toronto at Scarborough, Canada)

https://doi.org/10.33232/001c.146688

Next one up is “The Potential Impact of Primordial Black Holes on Exoplanet Systems” by Garett Brown (U. Toronto at Scarborough), Linda He (Harvard U., USA),  and James Unwin (U. Illinois Chicago, USA). This one was also published on Wednesday 5th November 2025, but in the folder Astrophysics of Galaxies. This one is an exploration of the possibility that primordial black holes (PBHs) in our Galaxy, might impact the orbits of exoplanets. The overlay is here:

You can find the official accepted version on arXiv here. The fediverse announcement is here:

Open Journal of Astrophysics

@OJ_Astro@fediscience.org

New Publication at the Open Journal of Astrophysics: "The Potential Impact of Primordial Black Holes on Exoplanet Systems" by Garett Brown (U. Toronto at Scarborough), Linda He (Harvard U., USA), James Unwin (U. Illinois Chicago, USA)

https://doi.org/10.33232/001c.146689

The fourth paper to report is “The Unhurried Universe: A Continued Search for Long Term Variability in ASAS-SN” by Sydney Petz, C. S. Kochanek & K. Z. Stanek (Ohio State U., USA), Benjamin J. Shappee (U. Hawaii, USA), Subo Dong (Peking University, China), J. L. Prieto (Universidad Diego Portales, Chile) and Todd A. Thompson (Ohio State U., USA). This one was also published on Wednesday November 5th 2025, but in the folder Solar and Stellar Astrophysics.  It describes the discovery and investigation of slowly-varying sources in the All Sky Automated Survey for SuperNovae (ASAS-AN) leading to the identification of 200 new variable stars. The overlay is here:

You can find the official published version on arXiv here. The Fediverse announcement follows:

Open Journal of Astrophysics

@OJ_Astro@fediscience.org

New Publication at the Open Journal of Astrophysics: "The Unhurried Universe: A Continued Search for Long Term Variability in ASAS-SN" by Sydney Petz, C. S. Kochanek & K. Z. Stanek (Ohio State U., USA), Benjamin J. Shappee (U. Hawaii, USA), Subo Dong (Peking University, China), J. L. Prieto (Universidad Diego Portales, Chile) and Todd A. Thompson (Ohio State U., USA)

https://doi.org/10.33232/001c.146690

The fifth and final paper for this week is “Measuring the splashback feature: Dependence on halo properties and history” by Qiaorong S. Yu (Oxford U., UK) and 9 others based in the UK and USA. This was published on Friday 7th November 2025 in the folder Cosmology and Nongalactic Astrophysics. It discusses how the properties of “splashback” features in halo profiles relate to the halo’s assembly history (e.g. mass accretion rate and most recent merger time). The overlay is here:

The officially accepted version can be found on arXiv here. The Fediverse announcement is here:

Open Journal of Astrophysics

@OJ_Astro@fediscience.org

New Publication at the Open Journal of Astrophysics: "Measuring the splashback feature: Dependence on halo properties and history" by Qiaorong S. Yu (Oxford U., UK) and 9 others based in the UK and USA.

https://doi.org/10.33232/001c.146824

That’s all the papers for this week. I’ll do another report next Saturday.

#Ariel #arXiv241204583v2 #arXiv250606429v2 #arXiv250705389v3 #arXiv250707174v2 #arXiv250722102v2 #CosmologyAndNonGalacticAstrophysics #DarkMatterHaloes #DiamondOpenAccess #DiamondOpenAccessPublishing #EarthAndPlanetaryAstrophysics #eccentricity #EuropeanSpaceAgency #exoplanets #ExtrrasolarPlanets #galaxyFormation #galaxyHaloes #GiantPlanets #OpenAccess #OpenJournalOfAstrophysics #primordialBlackHoles #Splashback #TheOpenJournalOfAstrophysics

#eccentricity : deviation from the customary line of conduct

- French: excentricité

- German: die Exzentrizität

- Italian: eccentricità

- Portuguese: excentricidade

- Spanish: excentricidad

------------

Join our new subreddit for language learners @ https://reddit.com/r/LearnANewLanguage

Scotti’s Italian Restaurant in Cincinnati is 105 years old, thus traditional

The first time I ever went to Scotti’s Italian restaurant was in my first years in Cin…
#dining #cooking #diet #food #Italianfamilymeals #amusement #Cincinnati #Desire #Eccentricity #Extroversion #familymeals #Italia #Italian #italiano #italy #OH #OverallNeutral #OverallPositive #restaurantreviews #Shame
https://www.diningandcooking.com/2166429/scottis-italian-restaurant-in-cincinnati-is-105-years-old-thus-traditional/

#eccentricity : deviation from the customary line of conduct

- French: excentricité

- German: die Exzentrizität

- Italian: eccentricità

- Portuguese: excentricidade

- Spanish: excentricidad

------------

Join our new subreddit for language learners @ https://reddit.com/r/LearnANewLanguage

Small #planets have nearly circular orbits, while giant planets have orbits about four times more elliptical.

The finding points toward two different pathways by which large and small planets form.

The #eccentricity split coincides with several other iconic features in the #exoplanet population, such as the high abundance of small planets over large planets and a tendency for giant planets to form only around #stars enriched in heavy elements.

#astronomy #exoplanets
https://astrobiology.com/2025/03/small-and-large-planets-have-significantly-different-upbringings.html

Planet-planet scattering plays an important role in the dynamical evolution of planetary systems and can reproduce the #eccentricity distribution of #exoplanets.

But it can also contribute to the current census of free floating #planets.

In general, 40−80% of the planets are ejected from the system experiencing planet-planet svattering depending on the number of planets initially in the system.

The process favours ejections of less massive planets.

https://astrobiology.com/2025/01/properties-of-free-floating-planets-ejected-through-planet-planet-scattering.html

Transiting #Exoplanet Survey Satellite is not only good at detecting #exoplanets.

Here are 11 new transiting brown dwarfs and very low-mass #stars from #TESS consisting of 5 brown dwarf companions and 6 very low mass stellar companions ranging in mass from 25 to 128 Jupiter masses.

The #eccentricity distribution for the transiting brown dwarf sample does not support previous claims of a transition between planetary and stellar formation at ∼42 Jupiter masses.

https://astrobiology.com/2025/01/11-new-transiting-brown-dwarfs-and-very-low-mass-stars-from-tess.html