Search Publications
Planetary nebulae in Gaia EDR3: Central star identification, properties, and binarity
Dafonte, C.; González-Santamaría, I.; Manteiga, M. +3 more
Context. The Gaia Early Data Release 3 (EDR3), published in December 2020, features improved photometry and astrometry compared to that published in the previous DR2 file and includes a substantially larger number of sources, of the order of 2000 million, making it a paradigm of big data astronomy. Many of the central stars of planetary nebulae (C…
RR Lyrae Variables in Messier 53: Near-infrared Period-Luminosity Relations and the Calibration Using Gaia Early Data Release 3
Herczeg, Gregory J.; de Grijs, Richard; Marconi, Marcella +6 more
We present new near-infrared, JHKs, period-luminosity relations (PLRs) for RR Lyrae variables in the Messier 53 (M53 or NGC 5024) globular cluster. Multi-epoch JHKs observations, obtained with the WIRCam instrument on the 3.6 m Canada-France-Hawaii Telescope, are used for the first time to estimate precise mean magnitudes for…
Lava worlds: From early earth to exoplanets
Gaidos, Eric; Chao, Keng-Hsien; deGraffenried, Rebecca +3 more
The magma ocean concept was first conceived to explain the geology of the Moon, but hemispherical or global oceans of silicate melt could be a widespread "lava world" phase of rocky planet accretion, and could persist on planets on short-period orbits around other stars. The formation and crystallization of magma oceans could be a defining stage i…
A giant X-ray dust scattering ring discovered with SRG/eROSITA around the black hole transient MAXI J1348-630
Wilms, J.; Predehl, P.; Freyberg, M. +3 more
We report the discovery of a giant dust scattering ring around the Black Hole transient MAXI J1348-630 with SRG/eROSITA during its first X-ray all-sky survey. During the discovery observation in February 2020, the ring had an outer diameter of 1.3 deg, growing to 1.6 deg by the time of the second all-sky survey scan in August 2020. This makes the …
Evidence for an MHD Disk Wind via Optical Forbidden Line Spectroastrometry
Pascucci, I.; Sterzik, M. F.; Alexander, R. D. +4 more
Spectroastrometry is used to investigate the low-velocity component (LVC) of the optical forbidden emission from the T Tauri stars RU Lupi and AS 205 N. Both stars also have high-velocity forbidden emission, which is tracing a jet. For AS 205 N, analysis reveals a complicated outflow system. For RU Lupi, the [O I] λ6300 and [S II]λλ6716,6731 LV na…
Probing Kilonova Ejecta Properties Using a Catalog of Short Gamma-Ray Burst Observations
Berger, E.; Smith, N.; Chornock, R. +11 more
The discovery of GW170817 and GRB 170817A in tandem with AT 2017gfo cemented the connection between neutron star mergers, short gamma-ray bursts (GRBs), and kilonovae. To investigate short GRB observations in the context of diverse kilonova behavior, we present a comprehensive optical and near-IR catalog of 85 bursts discovered over 2005-2020 on t…
A universal correlation between warm and hot gas in the stripped tails of cluster galaxies
Yoshida, Michitoshi; Fossati, Matteo; Nulsen, Paul E. J. +7 more
The impact of ram pressure stripping on galaxy evolution is well known (for example, ref. 1). Recent multi-wavelength data have revealed many examples of galaxies undergoing stripping, often accompanied with multi-phase tails2-13. As energy transfer in the multi-phase medium is an outstanding question in astrophysics, galaxie…
Search for associations containing young stars (SACY). VIII. An updated census of spectroscopic binary systems exhibiting hints of non-universal multiplicity among their associations
Bayo, A.; Huélamo, N.; Sterzik, M. F. +10 more
Context. Nearby young associations offer one of the best opportunities for a detailed study of the properties of young stellar and substellar objects thanks to their proximity (<200 pc) and age (∼5-150 Myr). Previous works have identified spectroscopic (<5 au) binaries, close (5-1000 au) visual binaries, and wide or extremely wide (1000-100 …
ARES IV: Probing the Atmospheres of the Two Warm Small Planets HD 106315c and HD 3167c with the HST/WFC3 Camera
Drossart, Pierre; Marcq, Emmanuel; Blain, Doriann +27 more
We present an atmospheric characterization study of two medium-sized planets bracketing the radius of Neptune: HD 106315c (RP = 4.98 ± 0.23 R⊕) and HD 3167c ( ${R}_{{\rm{P}}}={2.740}_{-0.100}^{+0.106}$ R⊕). We analyze spatially scanned spectroscopic observations obtained with the G141 grism (1.125-1.650 µm) o…
Double-peaked Lyman α emission at z = 6.803: a reionization-era galaxy self-ionizing its local H II bubble
Garel, Thibault; Verhamme, Anne; Ellis, Richard S. +2 more
We report the discovery of a double-peaked Lyman α profile in a galaxy at z = 6.803, A370p_z1, in the parallel Frontier Field of Abell 370. The velocity separation between the blue and red peaks of the Lyman α profile ( $\Delta v=101_{-19}^{+38} (\pm 48)\, \rm km\, \rm s^{-1}$ ) suggests an extremely high escape fraction of ionizing photons $\gt 5…