Explanipedia

Discovery and classification of two new Galactic symbiotic stars in the IGAPS footprint Open

M K Botello, L. Sabin, M. A. Gómez-Muñoz · 2025

Symbiotic stars are considered astrophysical laboratories due to their complex physical and chemical properties. Despite theoretical predictions suggesting the existence of at least 1,200 such systems in the Galaxy, only 284 have been iden…

A morphological catalogue of nova remnants Open

E. Santamaría, M. A. Guerrero, G. Ramos-Larios, J. A. Toalá, L. Sabin · 2025

This work presents the first optical imaging catalogue of resolved galactic nova remnants. It compiles images from proprietary observations carried out at the Nordic Optical Telescope and public archives using different telescopes and inst…

A morphological catalogue of Nova Remnants Open

E. Santamaría, M. A. Guerrero, G. Ramos-Larios, J. A. Toalá, L. Sabin · 2025

This work presents the first optical imaging catalogue of resolved Galactic nova remnants. It compiles images from proprietary observations carried out at the Nordic Optical Telescope and public archives using different telescopes and inst…

An attempt to determine the magnetic field configuration in the planetary nebula K 3-35 with ALMA Open

L. Sabin, Qizhou Zhang, L. F. Miranda, M. A. Gómez-Muñoz · 2025

We examined dust polarization within the planetary nebula (PN) K 3-35 using the Atacama Large Millimeter/Submillimeter Array (ALMA). This investigation aimed to identify and trace the magnetic field within the PN, as it potentially plays a…

High-Speed Outflows and Dusty Disks during the AGB to PN Transition: The PANORAMA survey Open

Raghvendra Sahai, J. Alcolea, Bruce Balick, Eric G. Blackman, V. Bujarrabal , et al. · 2024

As mass-losing asymptotic giant branch (AGB) stars evolve to planetary nebulae (PNe), the mass outflow geometries transform from nearly spherical to extreme aspherical. The physical mechanisms governing this transformation are widely belie…

Shaping the nebula around the symbiotic system R Aquarii Open

E. Santamaría, J. A. Toalá, T. Liimets, M. A. Guerrero, M K Botello , et al. · 2024

We present an analysis of high-dispersion spectroscopic observations of the symbiotic system R Aquarii (R Aqr) obtained with the Manchester Echelle Spectrograph at the 2.1-m telescope of the San Pedro Mártir Observatory (Mexico) in conjunc…

Detection of an Earth-sized exoplanet orbiting the nearby ultracool dwarf star SPECULOOS-3 Open

M. Gillon, P. P. Pedersen, Benjamin V. Rackham, Georgina Dransfield, Elsa Ducrot , et al. · 2024

3D physical structure and angular expansion of the remnant of the recurrent nova T Pyx Open

E. Santamaría, J. A. Toalá, M. A. Guerrero, G. Ramos-Larios, L. Sabin · 2024

We present the analysis of archival Very Large Telescope (VLT) Multi-Unit Spectroscopic Explorer (MUSE) and multi-epoch Hubble Space Telescope (HST) Wide Field Planetary Camera 2 (WFPC2) and Wide Field Camera 3/Ultraviolet-Visible Imaging …

Shaping the nebula around the symbiotic system R Aquarii Open

E. Santamaría, J. A. Toalá, T. Liimets, M. A. Guerrero, M. K. Botello , et al. · 2024

We present an analysis of high-dispersion spectroscopic observations of the symbiotic system R Aquarii (R Aqr) obtained with the Manchester Echelle Spectrograph (MES) at the 2.1 m telescope of the San Pedro Mártir Observatory (Mexico). An …

3D physical structure and angular expansion of the remnant of the recurrent nova T Pyx Open

E. Santamaría, J. A. Toalá, M. A. Guerrero, G. Ramos-Larios, L. Sabin · 2024

We present the analysis of archival Very Large Telescope (VLT) MUSE and multi-epoch Hubble Space Telescope (HST) WFPC2 and WFC3/UVIS narrow-band observations of the remnant associated with the ejecta of the mid-nineteenth century outburst …

TOI-663: A newly discovered multi-planet system with three transiting mini-Neptunes orbiting an early M star Open

M. Cointepas, F. Bouchy, J. M. Almenara, X. Bonfıls, N. Astudillo-Defru , et al. · 2024

We present the detection of three exoplanets orbiting the early M dwarf TOI-663 (TIC 54962195; V = 13.7 mag, J = 10.4 mag, R ★ = 0.512 ± 0.015 R ⊙ , M ★ = 0.514 ± 0.012 M ⊙ , d = 64 pc). TOI-663 b, c, and d, with respective radii of 2.27 ±…

High-Speed Outflows and Dusty Disks during the AGB to PN Transition: The PANORAMA survey Open

R. Sahai, J. Alcolea, Bruce Balick, Eric G. Blackman, V. Bujarrabal , et al. · 2023

As AGB stars evolve to planetary nebulae (PNe), the geometry of the ejected mass transforms from nearly spherical to extremely aspherical. The mechanisms governing this transformation are plausibly linked to binarity and the associated pro…

PB0146 Functional Characterization of a Human F9 Gene-Inserted Product in Hemophilia B Mice Open

Dan Chalothorn, L. Sabin, Kok‐Song Lai, Yunjeong Kim, Rita Sattler , et al. · 2023

TESS discovery of a super-Earth orbiting the M-dwarf star TOI-1680 Open

Mourad Ghachoui, A. Soubkiou, Robert D. Wells, Benjamin V. Rackham, A. H. M. J. Triaud , et al. · 2023

We report the discovery by the TESS mission of a super-Earth on a 4.8-days orbit around an inactive M4.5 dwarf (TOI-1680), validated by ground-based facilities. The host star is located 37.14 pc away, with a radius of 0.2100 ± 0.0064 R ⊙ ,…

TOI-2084 b and TOI-4184 b: Two new sub-Neptunes around M dwarf stars Open

Khalid Barkaoui, Mathilde Timmermans, Abderahmane Soubkiou, Benjamin V. Rackham, Adam J. Burgasser , et al. · 2023

We present the discovery and validation of two TESS exoplanets orbiting nearby M dwarfs: TOI-2084 b, and TOI-4184b. We characterized the host stars by combining spectra from Shane /Kast and Magellan /FIRE, spectral energy distribution anal…

TESS discovery of a super-Earth orbiting the M dwarf star TOI-1680 Open

Mourad Ghachoui, A. Soubkiou, R. D. Wells, Benjamin V. Rackham, A. H. M. J. Triaud , et al. · 2023

We report the discovery by the TESS mission of a super-Earth on a 4.8-d orbit around an inactive M4.5 dwarf (TOI-1680) validated by ground-based facilities. The host star is located 37.14 pc away, with a radius of 0.2100+/-0.0064 R_sun, ma…

GJ 806 (TOI-4481): A bright nearby multi-planetary system with a transiting hot low-density super-Earth Open

Ε. Πάλλη, J. Orell-Miquel, Madison Brady, Jacob L. Bean, A. P. Hatzes , et al. · 2023

One of the main scientific goals of the TESS mission is the discovery of transiting small planets around the closest and brightest stars in the sky. Here, using data from the CARMENES, MAROON-X, and HIRES spectrographs together with TESS, …

TOI-2084 b and TOI-4184 b: two new sub-Neptunes around M dwarf stars Open

Khalid Barkaoui, Mathilde Timmermans, Abderahmane Soubkiou, Benjamin V. Rackham, Adam J. Burgasser , et al. · 2023

We present the discovery and validation of two TESS exoplanets orbiting nearby M dwarfs: TOI-2084b, and TOI-4184b. We characterized the host stars by combining spectra from Shane/Kast and Magellan/FIRE, SED (Spectral Energy Distribution) a…

The origin of the planetary nebula M 1–16 Open

M. A. Gómez-Muñoz, R. Vázquez, L. Sabin, L. Olguín, P. F. Guillén , et al. · 2023

We investigated the origin of the Planetary Nebula (PN) M 1–16 using narrow-band optical imaging, and high- and low-resolution optical spectra to perform a detailed morpho-kinematic and chemical studies. M 1–16 is revealed to be a multipol…

The origin of the planetary nebula M 1-16. A morphokinematic and chemical analysis Open

M. A. Gómez-Muñoz, R. Vázquez, L. Sabin, L. Olguín, P. F. Guillén , et al. · 2023

We investigated the origin of the Planetary Nebula (PN) M 1-16 using narrow-band optical imaging, and high- and low-resolution optical spectra to perform a detailed morpho-kinematic and chemical studies. M 1-16 is revealed to be a multipol…

Three-dimensional Orbit of AC Her Determined: Binary-induced Truncation Cannot Explain the Large Cavity in This Post-AGB Transition Disk Open

Narsireddy Anugu, J. Kluska, Tyler Gardner, John D. Monnier, H. Van Winckel , et al. · 2023

Some evolved binaries, namely post–asymptotic giant branch (AGB) binaries, are surrounded by stable and massive circumbinary disks similar to protoplanetary disks found around young stars. Around 10% of these disks are transition disks: th…

Peering into the central region of a nano-quasar: XMM-Newton and Chandra views of the CH Cyg Symbiotic System Open

J. A. Toalá, O. González-Martín, Margarita Karovska, Rodolfo Montez, M. K. Botello , et al. · 2023

We present the analysis of archival XMM-Newton and Chandra observations of CH Cyg, one of the most studied symbiotic stars (SySts). The combination of the high-resolution XMM-Newton RGS and Chandra HETG X-ray spectra allowed us to obtain r…

Three-dimensional orbit of AC Her determined: Binary-induced truncation cannot explain the large cavity in this post-AGB transition disk Open

Narsireddy Anugu, J. Kluska, Tyler Gardner, John D. Monnier, H. Van Winckel , et al. · 2023

Some evolved binaries, namely post-asymptotic giant branch binaries, are surrounded by stable and massive circumbinary disks similar to protoplanetary disks found around young stars. Around 10% of these disks are transition disks: they hav…

An XMM-Newton View of the Symbiotic Stars HM Sge, NQ Gem, and PU Vul Open

J. A. Toalá, M K Botello, L. Sabin · 2023

We present the analysis of archival XMM-Newton observations of the symbiotic stars HM Sge, NQ Gem, and PU Vul. The EPIC-pn spectra hint at the presence of emission lines, which are further confirmed in the first-order RGS spectra of the th…

Surface magnetism in the pulsating RV Tauri star R Scuti Open

S. Georgiev, Agnes Lèbre, E. Josselin, P. Mathias, R. Konstantinova‐Antova , et al. · 2023

We present the surface magnetic field conditions of the brightest pulsating RV Tauri star, R Sct. Our investigation is based on the longest spectropolarimetric survey ever performed on this variable star. The analysis of high resolution sp…

A super-Earth and a mini-Neptune near the 2:1 MMR straddling the radius valley around the nearby mid-M dwarf TOI-2096 Open

F. J. Pozuelos, Mathilde Timmermans, Benjamin V. Rackham, L. J. Garcia, Adam J. Burgasser , et al. · 2023

Context. Several planetary formation models have been proposed to explain the observed abundance and variety of compositions of super-Earths and mini-Neptunes. In this context, multitransiting systems orbiting low-mass stars whose planets …

GJ 806 (TOI-4481): A bright nearby multi-planetary system with a transiting hot, low-density super-Earth Open

Ε. Πάλλη, J. Orell-Miquel, Madison Brady, Jacob L. Bean, A. P. Hatzes , et al. · 2023

One of the main scientific goals of the TESS mission is the discovery of transiting small planets around the closest and brightest stars in the sky. Here, using data from the CARMENES, MAROON-X, and HIRES spectrographs, together with TESS,…

The messy death of a multiple star system and the resulting planetary nebula as observed by JWST Open

Orsola De Marco, Muhammad Akashi, S. Akras, J. Alcolea, Isabel Aleman , et al. · 2023

Planetary nebulae (PNe), the ejected envelopes of red giant stars, provide us with a history of the last, mass-losing phases of 90 percent of stars initially more massive than the Sun. Here, we analyse James Webb Space Telescope (JWST) Ear…

Author Correction: The messy death of a multiple star system and the resulting planetary nebula as observed by JWST Open

Orsola De Marco, Muhammad Akashi, S. Akras, J. Alcolea, Isabel Aleman , et al. · 2023

The messy death of a multiple star system and the resulting planetary nebula as observed by JWST Open

Orsola De Marco, Muhammad Akashi, S. Akras, J. Alcolea, Isabel Aleman , et al. · 2022

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