Search Publications
Asteroid-comet continuum objects in the solar system
Hsieh, Henry H.
In this review presented at the Royal Society meeting, `Cometary science after Rosetta', I present an overview of studies of small solar system objects that exhibit properties of both asteroids and comets (with a focus on so-called active asteroids). Sometimes referred to as `transition objects', these bodies are perhaps more appropriately describ…
Binary companions of nearby supernova remnants found with Gaia
Evans, N. W.; Fraser, M.; Izzard, R. G. +2 more
Aims: We search for runaway former companions of the progenitors of nearby Galactic core-collapse supernova remnants (SNRs) in the Tycho-Gaia astrometric solution (TGAS).
Methods: We look for candidates among a sample of ten SNRs with distances ≲2kpc, taking astrometry and G magnitude from TGAS and B,V magnitudes from the AAVSO Photometr…
Statistical Study of Solar Dimmings Using CoDiT
Krista, Larisza D.; Reinard, Alysha A.
We present the results from analyzing the physical and morphological properties of 154 dimmings (transient coronal holes) and the associated flares and coronal mass ejections (CMEs). Each dimming in our 2013 catalog was processed with the semi-automated Coronal Dimming Tracker using Solar Dynamics Observatory AIA 193 Å observations and HMI magneto…
A close encounter of the massive kind
Maíz Apellániz, J.; Sana, H.; Barbá, R. H. +2 more
We have used (I) Hubble Space Telescope Advanced Camera for Surveys imaging and Space Telescope Imaging Spectrograph spectroscopy, (II) ground-based Precision Integrated-Optics Near-infrared Imaging ExpeRiment/Very Large Telescope long-baseline interferometry, and (III) ground-based spectroscopy from different instruments to study the orbit of the…
Powerful CMD: a tool for color-magnitude diagram studies
Fan, Zhou; Chen, Li; Li, Zhong-Mu +5 more
We present a new tool for color-magnitude diagram (CMD) studies, Powerful CMD. This tool is built based on the advanced stellar population synthesis (ASPS) model, in which single stars, binary stars, rotating stars and star formation history have been taken into account. Via Powerful CMD, the distance modulus, color excess, metallicity, age, binar…
Multi-wavelength campaign on NGC 7469. I. The rich 640 ks RGS spectrum
Kaspi, Shai; Kriss, Gerard A.; Mehdipour, Missagh +15 more
Aims: Outflows in active galaxies (AGNs) are common, although their launching mechanism, location, and physical impact on the host galaxy remain controversial. We conducted a multi-wavelength six-month campaign to observe the nearby Seyfert galaxy NGC 7469 with several observatories in order to better understand and quantify the outflow in th…
The Grism Lens-Amplified Survey from Space (GLASS). VIII. The Influence of the Cluster Properties on Hα Emitter Galaxies at 0.3 < z < 0.7
Pentericci, Laura; Schmidt, Kasper B.; Treu, Tommaso +13 more
Exploiting the data of the Grism Lens-Amplified Survey from Space (GLASS), we characterize the spatial distribution of star formation in 76 highly active star-forming galaxies in 10 clusters at 0.3< z< 0.7. All of these galaxies are likely restricted to first infall. In a companion paper, we contrast the properties of field and cluster galax…
Predicting the magnetic vectors within coronal mass ejections arriving at Earth: 2. Geomagnetic response
Thompson, B. J.; Bothmer, V.; Richardson, I. G. +6 more
This is a companion to Savani et al. (2015) that discussed how a first-order prediction of the internal magnetic field of a coronal mass ejection (CME) may be made from observations of its initial state at the Sun for space weather forecasting purposes (Bothmer-Schwenn scheme (BSS) model). For eight CME events, we investigate how uncertainties in …
Io plasma torus ion composition: Voyager, Galileo, and Cassini
Steffl, Andrew J.; Bagenal, Fran; Nerney, Edward G.
The Io torus produces ultraviolet emissions diagnostic of plasma conditions. We revisit data sets obtained by the Voyager 1, Galileo, and Cassini missions at Jupiter. With the latest version (8.0) of the CHIANTI atomic database we analyze UV spectra to determine ion composition. We compare ion composition obtained from observations from these thre…
Outbursts of the intermediate-mass black hole HLX-1: a wind-instability scenario
Soria, Roberto; Wu, Kinwah; Zampieri, Luca +5 more
We model the intermediate-mass black hole HLX-1, using the Hubble Space Telescope, XMM-Newton and Swift. We quantify the relative contributions of a bluer component, function of X-ray irradiation, and a redder component, constant and likely coming from an old stellar population. We estimate a black hole mass {≈ } (2^{+2}_{-1}) × 10^4 M_{⊙}, a spin…