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Simultaneous retrieval of orbital phase resolved JWST/MIRI emission spectra of the hot Jupiter WASP-43b: evidence of water, ammonia, and carbon monoxide
Irwin, Patrick G. J.; Bell, Taylor J.; Kreidberg, Laura +14 more
Spectroscopic phase curves of hot Jupiters measure their emission spectra at multiple orbital phases, thus enabling detailed characterization of their atmospheres. Precise constraints on the atmospheric composition of these exoplanets offer insights into their formation and evolution. We analyse four phase-resolved emission spectra of the hot Jupi…
Introducing the Condor Array Telescope - III. The expansion and age of the shell of the dwarf nova Z Camelopardalis, and detection of a second, larger shell
Zurek, David R.; Walter, Frederick M.; Rich, R. Michael +7 more
The existence of a vast nova shell surrounding the prototypical dwarf nova Z Camelopardalis (Z Cam) proves that some old novae undergo metamorphosis to appear as dwarf novae thousands of years after a nova eruption. The expansion rates of ancient nova shells offer a way to constrain both the time between nova eruptions and the time for post-nova m…
The AstraLux-TESS high spatial resolution imaging survey. Search for stellar companions of 215 planet candidates from TESS
Montesinos, B.; Mendigutía, I.; Huélamo, N. +6 more
Context. Chance-aligned sources or blended companions can cause false positives in planetary transit detections or simply bias the determination of the candidate properties. In the era of high-precision space-based photometers, the need for high spatial resolution images has been demonstrated to be critical for validating and confirming transit si…
Scaling relations for globular cluster systems in early-type galaxies - III. The inner flattening of the radial distributions
Caso, Juan Pablo; Ennis, Ana Inés; De Bórtoli, Bruno Javier
The current properties of globular cluster systems (GCSs) in the nearby Universe are a consequence of an evolutionary history ruled by accretion and disruption processes. The analysis of scaling relations for GCSs is crucial for understanding the relevance of different physical processes involved in their origin and subsequent survival. In this wo…
High-speed stars. II. An unbound star, young stars, bulge metal-poor stars, and Aurora candidates
Bonifacio, P.; Caffau, E.; Spite, M. +6 more
Context. The data from the Gaia satellite led us to revise our conception of the Galaxy structure and history. Hitherto unknown components have been discovered and a deep re-thinking of what the Galactic halo is in progress.
Aims: We selected from the Gaia catalogue stars with extreme transverse velocities with respect to the Sun (|VT
The Orbit and Dynamical Mass of Polaris: Observations with the CHARA Array
Torres, Guillermo; Mérand, Antoine; Monnier, John D. +19 more
The 30 yr orbit of the Cepheid Polaris has been followed with observations by the Center for High Angular Resolution Astronomy (CHARA) Array from 2016 through 2021. An additional measurement has been made with speckle interferometry at the Apache Point Observatory. Detection of the companion is complicated by its comparative faintness—an extreme f…
The Featherweight Giant: Unraveling the Atmosphere of a 17 Myr Planet with JWST
Vanderburg, Andrew; Batalha, Natasha E.; Brown, Alexander +29 more
The characterization of young planets (<300 Myr) is pivotal for understanding planet formation and evolution. We present the 3–5 µm transmission spectrum of the 17 Myr, Jupiter-size (R ∼10R ⊕) planet, HIP 67522b, observed with JWST NIRSpec/G395H. To check for spot contamination, we obtain a simultaneous g-band transit with the …
TOI-5126: a hot super-Neptune and warm Neptune pair discovered by TESS and CHEOPS
Bieryla, Allyson; Latham, David W.; Quinn, Samuel N. +33 more
We present the confirmation of a hot super-Neptune with an exterior Neptune companion orbiting a bright (V = 10.1 mag) F-dwarf identified by the Transiting Exoplanet Survey Satellite (TESS). The two planets, observed in sectors 45, 46, and 48 of the TESS extended mission, are $4.74_{-0.14}^{+0.16}$ and $3.86_{-0.16}^{+0.17}$ R⊕ with $5.…
Searching for X-ray counterparts of unassociated Fermi-LAT sources and rotation-powered pulsars with SRG/eROSITA
Becker, Werner; Mayer, Martin G. F.
Context. The latest source catalog of the Fermi-LAT telescope contains more than 7000 γ-ray sources at giga-electronvolt energies, with the two dominant source classes thought to be blazars and rotation-powered pulsars. Despite continuous follow-up efforts, around 2600 sources have no known multiwavelength association.
Aims: Our target is the…
AGN STORM 2. VII. A Frequency-resolved Map of the Accretion Disk in Mrk 817: Simultaneous X-Ray Reverberation and UVOIR Disk Reprocessing Time Lags
Kaspi, Shai; Barth, Aaron J.; Horne, Keith +35 more
X-ray reverberation mapping is a powerful technique for probing the innermost accretion disk, whereas continuum reverberation mapping in the UV, optical, and infrared (UVOIR) reveals reprocessing by the rest of the accretion disk and broad-line region (BLR). We present the time lags of Mrk 817 as a function of temporal frequency measured from 14 m…