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A Broadband X-Ray Study of a Sample of AGNs with [O III] Measured Inclinations
Ajello, M.; Marchesi, S.; Baloković, M. +2 more
In modeling the X-ray spectra of active galactic nuclei (AGNs), the inclination angle is a parameter that can play an important role in analyzing the X-ray spectra of AGNs, but it has never been studied in detail. We present a broadband X-ray spectral analysis of the joint Nuclear Spectroscopic Telescope Array-XMM-Newton observations of 13 sources…
Extinction-free Census of AGNs in the AKARI/IRC North Ecliptic Pole Field from 23-band infrared photometry from Space Telescopes
Hashimoto, Tetsuya; Goto, Tomotsugu; Kim, Seong Jin +21 more
In order to understand the interaction between the central black hole and the whole galaxy or their co-evolution history along with cosmic time, a complete census of active galactic nucleus (AGN) is crucial. However, AGNs are often missed in optical, UV, and soft X-ray observations since they could be obscured by gas and dust. A mid-infrared (MIR)…
The Warm-Hot, Extended, Massive Circumgalactic Medium of NGC 3221: An XMM-Newton Discovery
Mathur, Smita; Gupta, Anjali; Das, Sanskriti
Using Suzaku data, we had found a 3.4σ evidence for the X-ray emitting warm-hot circumgalactic medium (CGM) in the L⋆ galaxy NGC 3221. Here we present XMM-Newton data and outline an efficient, rigorous, and well-defined method to extract the faint CGM signal. We confirm the CGM detection at 4σ significance within 30-200 kpc of the galax…
HD 191939: Three Sub-Neptunes Transiting a Sun-like Star Only 54 pc Away
Barclay, Thomas; Vanderburg, Andrew; Mikal-Evans, Thomas +38 more
We present the discovery of three sub-Neptune-sized planets transiting the nearby and bright Sun-like star HD 191939 (TIC 269701147, TOI 1339), a Ks = 7.18 mag G8 V dwarf at a distance of only 54 pc. We validate the planetary nature of the transit signals by combining 5 months of data from the Transiting Exoplanet Survey Satellite with …
Formation of Post-CME Blobs Observed by LASCO-C2 and K-Cor on 2017 September 10
Lee, Kyoung-Sun; Jang, Soojeong; Cho, Kyung-Suk +6 more
Understanding the formation of post-CME blobs, we investigate 2 blobs in the outer corona observed by LASCO-C2 and 34 blobs in the inner corona by K-Cor on 2017 September 10 from 17:11 to 18:58 UT. By visual inspection of the structure of a post-CME current sheet (CS) and its associated blobs, we find that the CS is well identified in the K-Cor an…
Measurement of the B-band galaxy Luminosity Function with Approximate Bayesian Computation
Tortorelli, Luca; Herbel, Jörg; Amara, Adam +3 more
The galaxy Luminosity Function (LF) is a key observable for galaxy formation, evolution studies and for cosmology. In this work, we propose a novel technique to forward model wide-field broad-band galaxy surveys using the fast image simulator UFig and measure the LF of galaxies in the B-band. We use Approximate Bayesian Computation (ABC) to constr…
An ALMA/NOEMA study of gas dissipation and dust evolution in the 5 Myr-old HD 141569A hybrid disc
Augereau, J. -C.; Boccaletti, A.; Chapillon, E. +5 more
Context. The study of gas-rich debris discs is fundamental to characterising the transition between protoplanetary discs and debris discs.
Aims: We determine the physical parameters of the brightest gas-rich debris disc orbiting HD 141569A.
Methods: We analyse images from the NOrthern Extended Millimeter Array (NOEMA)1 and the…
A charging model for the Rosetta spacecraft
Henri, P.; Eriksson, A. I.; Johansson, F. L. +5 more
Context. The electrostatic potential of a spacecraft, VS, is important for the capabilities of in situ plasma measurements. Rosetta has been found to be negatively charged during most of the comet mission and even more so in denser plasmas.
Aims: Our goal is to investigate how the negative VS correlates with electron den…
Optical polarization properties of AGNs with significant VLBI-Gaia offsets
Blinov, D.; Kovalev, Y. Y.; Zobnina, D. I. +1 more
Significant positional offsets of the value from 1 mas to more than 10 mas were found previously between radio (VLBI) and optical (Gaia) positions of active galactic nuclei (AGNs). They happen preferentially parallel to the parsec-scale jet direction. AGNs with VLBI-to-Gaia offsets pointed downstream the jet are found to have favourably higher opt…
The MASSIVE Survey XIV—Stellar Velocity Profiles and Kinematic Misalignments from 200 pc to 20 kpc in Massive Early-type Galaxies
Ma, Chung-Pei; Greene, Jenny E.; Blakeslee, John P. +3 more
We use high spatial resolution stellar velocity maps from the Gemini integral-field spectrograph (IFS) and wide-field velocity maps from the McDonald Mitchell IFS to study the stellar velocity profiles and kinematic misalignments from ∼200 pc to ∼20 kpc in 20 early-type galaxies (ETGs) with stellar mass M* > 1011.7M⊙<…