Search Publications
Background Short-period Eclipsing Binaries in the Original Kepler Field
Bódi, Attila; Szabó, Róbert; Forró, Adrienn +2 more
During the primary Kepler mission, between 2009 and 2013, about 150,000 preselected targets were observed with a 29.42 minute long cadence. However, a survey of background stars that fall within the field of view (FOV) of the downloaded apertures of the primary targets has revealed a number of interesting objects. In this paper, we present the res…
Resolving the inner accretion flow towards the central supermassive black hole in SDSS J1339+1310
Goicoechea, L. J.; Sergeyev, A. V.; Shalyapin, V. N. +2 more
We studied the accretion disc structure in the doubly imaged lensed quasar SDSS J1339+1310 using r-band light curves and UV-visible to near-IR spectra from the first 11 observational seasons after its discovery. The 2009-2019 light curves displayed pronounced microlensing variations on different timescales, and this microlensing signal permitted u…
X-Ray Evidence Against the Hypothesis that the Hyperluminous z = 6.3 Quasar J0100+2802 is Lensed
Connor, Thomas; Stern, Daniel; Bañados, Eduardo +1 more
The z = 6.327 quasar SDSS J010013.02+280225.8 (hereafter J0100+2802) is believed to be powered by a black hole more massive than 1010 M ⊙, making it the most massive black hole known in the first billion years of the universe. However, recent high-resolution ALMA imaging shows four structures at the location of this quasar, p…
Diagnosing Open Cluster Stock 2: Member Candidates and Mass Distribution with Gaia DR2 and LAMOST
Bird, Sarah A.; Zhao, Gang; Liu, Chao +5 more
We identify 1325 member candidates of the open cluster (OC) Stock 2 using data from Gaia DR2. We use the algorithms Clusterix 2.0 and HDBSCAN to select cluster candidates and further refine the final cluster membership by defining neighbors in 5D phase space (Xcp, Ycp, ${Z}_{\mathrm{cp}},\kappa \cdot {\mu }_{\alpha }^{* }$ /ϖ…
Observational constraints to the dynamics of dust particles in the coma of comet 67P/Churyumov-Gerasimenko
Sierks, H.; Fulle, M.; Güttler, C. +18 more
In this work, we aim to characterize the dust motion in the inner coma of comet 67P/Churyumov-Gerasimenko to provide constraints for theoretical 3D coma models. The OSIRIS camera on-board the Rosetta mission was able for the first time to acquire images of single dust particles from inside the cometary coma, very close to the nucleus. We analyse a…
The VVV open cluster project. Near-infrared sequences of NGC 6067, NGC 6259, NGC 4815, Pismis 18, Trumpler 23, and Trumpler 20
Peña Ramírez, K.; Chené, A. -N.; Ramírez Alegría, S. +1 more
Open clusters are central elements of our understanding of the Galactic disc evolution, as an accurate determination of their parameters leads to an unbiased picture of our Galaxy's structure. Extending the analysis towards fainter magnitudes in cluster sequences has a significant impact on the derived fundamental parameters, such as extinction an…
Associated Molecular and Atomic Clouds with X-Ray Shell of Superbubble 30 Doradus C in the LMC
Filipović, M. D.; Aharonian, F.; Rowell, G. +20 more
30 Doradus C is a superbubble that emits the brightest non-thermal X- and TeV gamma-rays in the Local Group. To explore the detailed connection between the high-energy radiation and the interstellar medium, we have carried out new CO and HI observations using the Atacama Large Millimeter/Submillimeter Array (ALMA), Atacama Submillimeter Telescope …
The Hubble PanCET program: Transit and Eclipse Spectroscopy of the Hot-Jupiter WASP-74b
Deming, Drake; Nikolov, Nikolay; Mikal-Evans, Thomas +12 more
Planets are like children with each one being unique and special. A better understanding of their collective properties requires a deeper understanding of each planet. Here we add the transit and eclipse spectra of hot-Jupiter WASP-74b into the ever growing data set of exoplanet atmosphere spectral library. With six transits and three eclipses usi…
Candidate z ∼ 2.5 Lyman Continuum Sources in the GOODS Fields
Barger, A. J.; Cowie, L. L.; Jones, L. H.
We use the wealth of deep archival optical spectroscopy on the GOODS-South field from Keck, the VLT, and other facilities to select candidate high-redshift Lyman continuum (LyC) leakers in the Hubble Deep UV Legacy Survey (HDUV) data set. We select sources at $2.35\lt z\lt 3.05$ , where the HST/WFC3 F275W filter probes only the redshifted LyC. We …
Revisiting the formation mechanism for coronal rain from previous studies
Peter, Hardi; Chitta, Lakshmi Pradeep; Li, Le-Ping +1 more
Solar coronal rain is classified generally into two categories: flare-driven and quiescent coronal rain. Th latter is observed to form along both closed and open magnetic field structures. Recently, we proposed that some of the quiescent coronal rain events, detected in the transition region and chromospheric diagnostics, along loop-like paths cou…