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Noûs, Volume 60, Issue 3, Page 593-605, September 2026.ABSTRACT It is a truism of mathematics that differences between isomorphic number systems are irrelevant to arithmetic. This truism is deeply rooted in the modern axiomatic method and underlies most strands of arithmetical structuralism, the view that arithmetic is about some abstract number structure.
Balthasar Grabmayr
wiley +1 more source
Dispersed T Tauri stars and galactic star formation
AIP Conference Proceedings, 1996 The spatial distribution, age distribution and kinematics of T Tauri stars, both close to and widely distributed around active clouds, are considered using simple models of T Tauri dispersal. Models are compared to observations in and around the nearby cloud complexes, in particular the recent discovery of widely scattered young stars from the ROSAT ...
openaire +1 more source
On the Mass Accretion Rates of Herbig Ae/Be Stars. Magnetospheric Accretion or Boundary Layer?
Galaxies, 2020 Understanding how young stars gain their masses through disk-to-star accretion is of paramount importance in astrophysics. It affects our knowledge about the early stellar evolution, the disk lifetime and dissipation processes, the way the planets form ...
Ignacio Mendigutía
doaj +1 more source
Disks around weak-line T Tauri stars
, 2006 THESIS 8263The formation of low -mass (M ~ 1 M⊙) stars has generally been divided into four stages before reaching the main sequence: Class 0 (cloud of gas and dust) -> Class I (embedded star with disk in envelope) -> Class II (visible star with disk ) ->
Gras-Velázquez, Àgueda
core
X-Ray Irradiation of the Giant Planet Orbiting the T Tauri Star TAP 26
The Astrophysical JournalWe present new Chandra X-ray observations of TAP 26, a ≈17 Myr old magnetically active weak-lined T Tauri star that has been reported to host a massive planet in a ≈10.8 day orbit.
Stephen L. Skinner, Manuel Güdel
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Magnetospheric accretion in T Tauri stars
, 2003 The magnetic field of T Tauri stars is believed to be strong enough to disrupt the inner region of their accretion disk. At the inner disk edge, matter flows along the magnetic field lines at free fall velocity and accretes at the magnetic poles onto ...
J. Bouvier
core +1 more source
A Predicted Great Dimming of T Tauri: Has it Begun?
The Astronomical JournalThe optical star in the T Tauri triple system is the prototype of young Sun-like stars in our galaxy. This complex and dynamic system has evidence for misaligned disks and outflows, and molecular material in a circumbinary ring that obscures the southern
Tracy L. Beck
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The enviroments of T Tauri stars
The Astrophysical Journal, 1983 The environments of T Tauri stars are probably determined by the interaction of a stellar wind with matter which is falling toward a newly formed star. As shown by Ulrich, the steady infall of cool gas with angular momentum toward the star leads to a density distribution with rhoproportionalr/sup -1/2/ inside a radius r/sub d/ and rhoproportionalr/sup -
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The unusual photometric activity of the weak line T Tauri star V715 Per
, 2018 The multi-year photometric observations of the weak line T Tauri star V715 Per in optical (V RI) and near infrared (JHK) bands have revealed an unusual combination of two different types of the photometric activity: low amplitude periodic brightness ...
Grinin, Vladimir +1 more
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The Walkaway Star HP Tau/G2: Evidence for a Stellar Merger
The Astronomical JournalHP Tau/G2 is a luminous G-type weak-line T Tauri star with a 1.2 day low-amplitude variability and a rotational velocity v sin i ∼130 km s ^−1 , yielding a large r sin i ∼3.1 R _⊙ . It has star spots, an oblate shape with significant gravity-darkening,
Bo Reipurth +8 more
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