Search Publications
The GAPS programme at TNG. XXXIV. Activity-rotation, flux-flux relationships, and active-region evolution through stellar age
Baratella, M.; Mallonn, M.; Scandariato, G. +26 more
Context. Active-region evolution plays an important role in the generation and variability of magnetic fields on the surface of lower main sequence stars. However, determining the lifetime of active-region growth and decay as well as their evolution is a complex task. Most previous studies of this phenomenon are based on optical light curves, whil…
A Search for Exoplanets in Open Clusters and Young Associations based on TESS Objects of Interest
Mann, Andrew W.; Gan, Tianjun; Sun, Qinghui +1 more
We report the results of our search for planet candidates in open clusters and young stellar associations based on the Transiting Exoplanet Survey Satellite (TESS) Objects of Interest Catalog. We find one confirmed planet, one promising candidate, one brown dwarf and three unverified planet candidates in a sample of 1229 open clusters from the sec…
Near-infrared Spectroscopy of a Massive Young Stellar Object in the Direction toward the Galactic Center: XCN and Aromatic C-D Features
Onaka, Takashi; Sakon, Itsuki; Shimonishi, Takashi
We report near-infrared (2.5-5 µm) long-slit (~30″) spectroscopy of a young stellar object in the direction toward the Galactic center with the Infrared Camera on board the AKARI satellite. The present target is suggested to be AFGL 2006 based on its very red color and close location. The spectra show strong absorption features of H2
Large-scale asymmetry in galaxy spin directions: Analysis of galaxies with spectra in DES, SDSS, and DESI Legacy Survey
Shamir, Lior
Multiple previous studies using several different probes have shown considerable evidence for the existence of cosmological-scale anisotropy and a Hubble-scale axis. One of the probes that show such evidence is the distribution of the directions toward which galaxies spin. The advantage of the analysis of the distribution of galaxy spin directions…
Circumnuclear Dust in AP Librae and the Source of Its VHE Emission
Georganopoulos, Markos; Breiding, Peter; Meyer, Eileen T. +2 more
The broad high-energy spectral component in blazars is usually attributed to various inverse Compton scattering processes in the relativistic jet, but has not been clearly identified in most cases due to degeneracies in physical models. AP Librae, a low-synchrotron-peaking BL Lac object (LBL) detected in 2015 by H.E.S.S. at very high energies (VHE…
Validation and atmospheric exploration of the sub-Neptune TOI-2136b around a nearby M3 dwarf
Kuzuhara, M.; Tamura, M.; Kudo, T. +51 more
Context. The NASA space telescope TESS is currently in the extended mission of its all-sky search for new transiting planets. Of the thousands of candidates that TESS is expected to deliver, transiting planets orbiting nearby M dwarfs are particularly interesting targets since they provide a great opportunity to characterize their atmospheres by t…
The Role of Filamentary Structures in the Formation of Two Dense Cores, L1544 and L694-2
Caselli, Paola; Chung, Eun Jung; Kim, Shinyoung +5 more
We present mapping results of two prestellar cores, L1544 and L694-2, embedded in filamentary clouds in C18O (3-2), 13CO (3-2), 12CO (3-2), HCO+ (4-3), and H13CO+ (4-3) lines with the James Clerk Maxwell Telescope to examine the role of the filamentary structures in the formation of…
Detection of Na and K in the Atmosphere of the Hot Jupiter HAT-P-1b with P200/DBSP
Wang, Hongchi; van Boekel, Roy; Chen, Guo +1 more
We present a new optical transmission spectrum of the hot Jupiter HAT-P-1b based on two transits observed with the Double Spectrograph (DBSP) on the Palomar 200-inch (P200) telescope. The DBSP transmission spectrum, covering a wavelength range from 3250 to 10007 Å, is consistent with that observed with the Hubble Space Telescope (HST), but the for…
Search for OB associations in Gaia Early Data Release 3
de Grijs, Richard; Chemel, Alexander A.; Glushkova, Elena V. +1 more
The distribution of young stars into OB associations has long been in need of updating. High-precision Gaia Early Data Release 3 astrometry, coupled with modern machine-learning methods, allows this to be done. We have compiled a well-defined sample which includes OB stars and young open clusters (OCs), in total comprising about 47 700 objects. To…
Luminous Optical and X-Ray Flaring of the Putative Redback Millisecond Pulsar 1FGL J0523.5-2529
Perez, Karen I.; Bogdanov, Slavko; Halpern, Jules P.
Several redback and black widow millisecond pulsar binaries have episodes of flaring in X-rays and optical. We initially detected such behavior from the Fermi selected redback candidate 1FGL J0523.5-2529 during optical time-series monitoring. Triggered observations with the Neil Gehrels Swift Observatory over the next ≈100 days showed episodic fla…