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TDCOSMO XXX: Spatially resolved kinematics of the deflectors in time-delay lens systems B1608+656 and SDSSJ1206+4332 from JWST-NIRSpec observation — arXiv:2609.09411

Source: arXiv (en)
Original: https://arxiv.org/abs/2609.09411
License (as archived): CC0-1.0
Archived: 2026-10-16T11:36:20.958Z
SHA-256 of the archived text: 3bd4f45be037ca722fc63ac6a1a1369f9f6e5265ec15e040edde5b2005eaddb2
Stable URL of this page: https://metraipolis.com/documento/dc_bedd7607dde2

How to cite

TDCOSMO XXX: Spatially resolved kinematics of the deflectors in time-delay lens systems B1608+656 and SDSSJ1206+4332 from JWST-NIRSpec observation — arXiv:2609.09411 — arXiv (en), https://arxiv.org/abs/2609.09411 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_bedd7607dde2 (Metraipolis archive dc_bedd7607dde2, sha256 3bd4f45be037ca722fc63ac6a1a1369f9f6e5265ec15e040edde5b2005eaddb2)

BibTeX

@misc{dcbedd7607dde2,
  title = {TDCOSMO XXX: Spatially resolved kinematics of the deflectors in time-delay lens systems B1608+656 and SDSSJ1206+4332 from JWST-NIRSpec observation — arXiv:2609.09411},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2609.09411},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_bedd7607dde2; sha256 3bd4f45be037ca722fc63ac6a1a1369f9f6e5265ec15e040edde5b2005eaddb2},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2609.09411. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

We present spatially resolved stellar kinematics of the deflector galaxies in two time-delay lens systems, B1608+656 and SDSS J1206+4332, measured from JWST NIRSpec integral field spectroscopy. B1608+656 is a quadruply imaged quasar lensed by a pair of tidally interacting galaxies, the primary deflector (G1) and a close companion (G2), for which we quantified G2's tidal influence on G1 and define a criterion identifying the region where this perturbation is negligible and standard Jeans-equation modeling remains valid. SDSS J1206+4332 is a doubly imaged quasar whose extended host galaxy is itself quadruply imaged by a foreground massive galaxy (G0), accompanied by a fainter perturber (G1). For both systems, we report the first spectroscopic redshift and velocity dispersion measurements of the perturber galaxies. For G2 in B1608+656, we measure {\sigma}_v = 188 +/- 7 (stat.) +/- 2 (sys.) km/s at z = 0.6307, identical to the redshift of the main deflector G1. For G1 in SDSS J1206+4332, we find {\sigma}_v = 100 +/- 21 (stat.) +/- 2 (sys.) km/s at z = 0.7403, slightly lower than the primary deflector G0. The resolved velocity maps of both primary deflectors show clear rotation signatures and we visually classify them as fast or regular rotators. The data products will be made publicly available and will be combined with time delays, lens models, and line-of-sight convergence to measure cosmological parameters in the upcoming TDCOSMO 2026 milestone publication.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-09-10 in astro-ph.IM).
Categorie arXiv: Astrophysics of Galaxies (astro-ph.GA) ; Cosmology and Nongalactic Astrophysics (astro-ph.CO); Instrumentation and Methods for Astrophysics (astro-ph.IM).
Pagina del lavoro: https://arxiv.org/abs/2609.09411 — 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 2026-10-16T11:21:03.739Z dalla pagina https://arxiv.org/catchup/astro-ph.IM/2026-09-10?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).