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The host galaxies of luminous type 2 AGNs at z ∼ 0.3-0.4
Koekemoer, A. M.; Carrera, F. J.; Huertas-Company, M. +7 more
We study the morphological and structural properties of the host galaxies associated with 57 optically selected luminous type 2 active galactic nuclei (AGNs) at z ∼ 0.3-0.4: 16 high-luminosity Seyfert 2 [HLSy2, 8.0 ≤ log(L_[O III]/L_{⊙}) < 8.3] and 41 obscured [QSO2, log(L_[O III]/L_{⊙})≥ 8.3] quasars. With this work, the total number of QSO2s …
CLIcK: a Continuum and Line fItting Kit for circumstellar disks
Pascucci, Ilaria; Henning, Thomas; Liu, Yao
Infrared spectroscopy with medium to high spectral resolution is essential to characterize the gas content of circumstellar disks. Unfortunately, conducting continuum and line radiative transfer of thermochemical disk models is too time-consuming to carry out large parameter studies. Simpler approaches using a slab model to fit continuum-subtracte…
Vibrational and electronic collisional-radiative model in CO2-N2-Ar mixtures for Mars entry problems
Annaloro, Julien; Bultel, Arnaud
To predict the nonequilibrium flows around a hypersonic vehicle entering the Martian atmosphere, the two-temperature collisional-radiative model "CoRaM-MARS" has been developed. The species CO2, CO, C2, CN, N2, NO, O2, C, N, O, Ar, CO+, C2 + , CN+, N…
Optical detection of the black widow binary PSR J2052+1219
Zharikov, S.; Deneva, J. S.; Kirichenko, A. +2 more
We present optical time-resolved multiband photometry of the black widow binary millisecond pulsar J2052+1219 using direct-imaging observations with the 2.1-m telescope of the Observatorio Astronomico Nacional San Pedro Mártir (OAN-SPM), Mexico. The observations reveal a variable optical source whose position and periodicity, P = 2.752 h, coincide…
WASP-169, WASP-171, WASP-175, and WASP-182: three hot Jupiters and one bloated sub-Saturn mass planet discovered by WASP-South
Bouchy, F.; Queloz, D.; Ségransan, D. +21 more
We present the discovery of four new giant planets from the Wide Angle Search for Planets-South (WASP-South), three hot Jupiters and one bloated sub-Saturn mass planet: WASP-169b, WASP-171b, WASP-175b, and WASP-182b. Besides the discovery photometry from WASP-South we use radial velocity measurements from CORALIE and HARPS and follow-up photometry…
Revealing the Star-Disk-Jet Connection in GM Aur Using Multiwavelength Variability
Hernández, J.; Macías, E.; Espaillat, C. C. +1 more
We analyze the first simultaneous X-ray, ultraviolet, optical, infrared, and centimeter observations of a T Tauri star (TTS). We present three epochs of simultaneous Spitzer and Very Large Array data of GM Aur separated by ∼1 week. These data are compared to previously published Hubble Space Telescope and Chandra observations from which mass accre…
Jellyfish: Resolving the Kinematics of Extreme Ram-pressure Stripping at z ∼ 0.3
Ebeling, Harald; Kalita, Boris S.
We present and discuss results from the first spatially resolved kinematic study of ram-pressure stripping of a massive late-type galaxy at intermediate redshifts. Our target, the spectacular “jellyfish” galaxy, A1758N_JFG1, was previously identified as a fast-moving member of the equal-mass merger A1758N (z = 0.28), with a star formation rate of …
Towards New Comet Missions
Kührt, E.; Gundlach, B.; Thomas, N. +6 more
The Rosetta observations have greatly advanced our knowledge of the cometary nucleus and its immediate environment. However, constraints on the mission (both planned and unplanned), the only partially successful Philae lander, and other instrumental issues have inevitably resulted in open questions. Surprising results from the many successful Rose…
Heavy metal enrichment in the intermediate He-sdOB pulsator Feige 46
Heber, U.; Latour, M.; Dorsch, M.
The intermediate He-enriched hot subdwarf star Feige 46 was recently reported as the second member of the V366 Aqr (or He-sdOBV) pulsating class. Feige 46 is very similar to the prototype of the class, LS IV - 14°116, not only in terms of pulsational properties, but also in terms of atmospheric parameters and kinematic properties. LS IV - 14°116 i…
Spectral observations of X Persei: Connection between Hα and X-ray emission
Zamanov, R.; Stoyanov, K. A.; Wolter, U. +2 more
We present spectroscopic observations of the Be/X-ray binary X Per obtained during the period 1999-2018. Using new and published data, we found that during "disc-rise" the expansion velocity of the circumstellar disc is 0.4-0.7 km s-1. Our results suggest that the disc radius in recent decades show evidence of resonant truncation of the…