Metraipolis › archive › dc_50221ab663d4

A Pre-Main Sequence Binary Viewed Through its Circumbinary Disk: A New Phase for KH 15D — arXiv:2608.10142

Source: arXiv (en)
Original: https://arxiv.org/abs/2608.10142
License (as archived): CC0-1.0
Archived: 2026-10-19T06:44:26.378Z
SHA-256 of the archived text: bb414e6a0dd60ce883e6f91a218f4960914bea24c06819c1d4dc2fe94f80e62e
Stable URL of this page: https://metraipolis.com/documento/dc_50221ab663d4

How to cite

A Pre-Main Sequence Binary Viewed Through its Circumbinary Disk: A New Phase for KH 15D — arXiv:2608.10142 — arXiv (en), https://arxiv.org/abs/2608.10142 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_50221ab663d4 (Metraipolis archive dc_50221ab663d4, sha256 bb414e6a0dd60ce883e6f91a218f4960914bea24c06819c1d4dc2fe94f80e62e)

BibTeX

@misc{dc50221ab663d4,
  title = {A Pre-Main Sequence Binary Viewed Through its Circumbinary Disk: A New Phase for KH 15D — arXiv:2608.10142},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2608.10142},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_50221ab663d4; sha256 bb414e6a0dd60ce883e6f91a218f4960914bea24c06819c1d4dc2fe94f80e62e},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2608.10142. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

The binary T Tauri system, KH 15D, is poised to provide unprecedented detail of gas and ices located between $\sim$3-5 AU of its circumbinary disk over the next few years. We analyze for the first time a complete set of ground-based time series photometry of the KH 15D system for which the 2022 October - 2025 April data have never been presented. By combining the latest $I$-band data with historical measurements, we show that the era of large amplitude photometric variability has ended. We define a revised photometric period of $P$ = 48.365 $\pm$ 0.005 days, which accurately phases data over a time span of seventy-five years. We adopt magnitudes and colors for the stars that define the epochs when either star A (1995-2008) or star B (2010-2012) is the primary source of the out-of-eclipse brightness of the system. We determine for the first time the effective optical depth for the system between 2002 and 2025 assuming gray extinction. The current out-of-eclipse system color is consistent with a combination of the light from both stars, supporting the previously suggested model in which the trailing edge of the circumbinary disk is more transparent than the leading edge. We continue to see evidence for ``clumps'' and variable transparency along ingress and egress when the stars are probing the occulting material and suggest that observations made during these phases should permit studies of the physical and chemical nature of the planet-forming zone with the circumbinary disk.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-08-12 in astro-ph.EP).
Categorie arXiv: Solar and Stellar Astrophysics (astro-ph.SR) ; Earth and Planetary Astrophysics (astro-ph.EP).
Pagina del lavoro: https://arxiv.org/abs/2608.10142 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-19T06:37:30.030Z dalla pagina https://arxiv.org/catchup/astro-ph.EP/2026-08-12?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).