Search Publications
Ram pressure stripping in the z ∼ 0.5 galaxy cluster MS 0451.6-0305
Durret, F.; Ebeling, H.; Jauzac, M. +3 more
Context. The pressure exerted by the ambient hot X-ray gas on cluster galaxies can lead to the presence of ram pressure stripped (RPS) galaxies, characterized by asymmetric shapes, and, in some cases, tails of blue stars and/or X-ray gas, with increased star formation.
Aims: With the aim of increasing the known sample of RPS galaxies at redsh…
Two years of optical and NIR observations of the superluminous supernova UID 30901 discovered by the UltraVISTA SN survey
Milvang-Jensen, B.; Fynbo, J. P. U.; Anderson, J. P. +6 more
We present deep optical and near-infrared photometry of UID 30901, a superluminous supernova (SLSN) discovered during the UltraVISTA survey. The observations were obtained with VIRCAM (YJHKs) mounted on the VISTA telescope, DECam (griz) on the Blanco telescope, and SUBARU Hyper Suprime-Cam (HSC; grizy). These multiband observations comp…
The Nearby Dwarf Irregular Galaxy IC 1613 and Its Complex Bubble Region: Chandra and VLA Observations
Schlegel, E. M.; Pannuti, Thomas G.; Moiseev, A. +2 more
We observed the nearby irregular galaxy IC 1613 with the Chandra X-ray Observatory, for 49.9 ks using the ACIS S3 chip, and with the VLA at 6 cm for 0.7 hr. The Chandra observation targeted the extensive bubble region in the northeast quadrant. We detect 31 sources within the D 25 diameter above a significance of 3σ corresponding to a p…
A Photometric and Spectroscopic Study of the Short-period Algol EW Boötis with a δ Sct Pulsator
Hong, Kyeongsoo; Lee, Jae Woo; Kim, Chun-Hwey +4 more
In this paper, we present Transiting Exoplanet Survey Satellite (TESS) photometry and high-resolution spectra of the short-period Algol EW Boo. We obtained double-lined radial velocities (RVs) from the time-series spectra and measured the effective temperature of the primary star as T eff,1 = 8560 ± 118 K. For the orbital period study, …
Detection of an unidentified soft X-ray emission feature in NGC 5548
Gu, Liyi; Ward, Martin; Mehdipour, Missagh +17 more
Context. NGC 5548 is an X-ray bright Seyfert 1 active galaxy. It exhibits a variety of spectroscopic features in the soft X-ray band, in particular including the absorption by the active galactic nucleus (AGN) outflows of a broad range of ionization states, with column densities up to 1027 m−2, and having speeds up to several…
Quantitative Evaluation of Coronal Magnetic Field Models Using Tomographic Reconstructions of Electron Density
Arge, C. N.; Henney, C. J.; Wang, T. J. +3 more
We introduce a new quantitative approach for assessing the quality of coronal magnetic field models. The method compares the location of the magnetic neutral line at a specified height in the magnetic field model with the locations of localized density peaks in the coronal electron density, as measured using coronal rotational tomography. This app…
PNV J00444033+4113068: Early superhumps with 0.7 mag amplitude and non-red color
Maehara, Hiroyuki; Nogami, Daisaku; Uemura, Makoto +13 more
In the first days of WZ Sge-type dwarf nova (DN) outbursts, the 2 : 1 resonance induces a spiral arm structure in the accretion disk, which is observed as early superhumps in optical light curves. We reports on our optical observations of an eclipsing WZ Sge-type DN PNV J00444033+4113068 during its 2021 superoutburst using the 3.8 m Seimei telesco…
Effects of Binaries on Open Cluster Age Determination in Bayesian Inference
Chen, Jing; Zhang, Su; Li, Zhong-Mu +2 more
We investigate the effects of binaries on the cluster age determination for 561 open clusters in the Galactic disk via the Bayesian statistical framework. Stellar properties of these star clusters, including age, metallicity, distance modulus, color excess, binary fraction, and rotating star fraction, are derived from color-magnitude-diagrams (CMD…
Estimating accurate reddening values of LAMOST M dwarfs
Chen, B. -Q.; Yuan, H. -B.; Sun, W. -X. +3 more
M dwarfs are the dominating type of stars in the solar neighbourhood. They serve as excellent tracers for the study of the distribution and properties of the nearby interstellar dust. In this work, we aim to obtain high accuracy reddening values of M dwarf stars from the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) Data Relea…
Interacting planetary nebulae III: verification and galactic population based on the measurements of Gaia EDR3
Ali, A.; Mindil, A.; Mohery, M. +1 more
The phenomenon of interaction between planetary nebulae (PNe) and the interstellar medium (ISM) is one of the significant issues in the field of astrophysics. The main objective of this paper is to verify the interaction process for objects that have been known as interacting PNe (IPNe) in the literature. This study is based on parallax and proper…