Search Publications
Missions
Journals
Publication Years
INTEGRAL Observations of GW170104
Sunyaev, R.; Hanlon, L.; Mereghetti, S. +16 more
We used data from the International Gamma-Ray Astrophysics Laboratory (INTEGRAL) to set upper limits on the γ-ray and hard X-ray prompt emission associated with the gravitational-wave event GW170104, discovered by the Laser Interferometer Gravitational-wave Observatory (LIGO)/Virgo collaboration. The unique omnidirectional viewing capability of th…
Validation of a scaling law for the coronal magnetic field strength and loop length of solar and stellar flares
Namekata, Kosuke; Shibata, Kazunari; Watanabe, Kyoko +2 more
Shibata and Yokoyama (1999, ApJ, 526, L49; 2002, ApJ, 577, 422) proposed a method of estimating the coronal magnetic field strength (B) and magnetic loop length (L) of solar and stellar flares, on the basis of magnetohydrodynamic simulations of the magnetic reconnection model. Using the scaling law provided by Shibata and Yokoyama (1999, ApJ, 526,…
The Survey of Lines in M31 (SLIM): The Drivers of the [C II]/TIR Variation
Schinnerer, Eva; Groves, Brent; Glover, Simon +7 more
The ratio of the [C II] 158 µ {{m}} emission line over the total infrared emission (TIR) is often used as a proxy for the photoelectric (PE) heating efficiency ({ɛ }{PE}) of the far-ultraviolet (FUV) photons absorbed by dust in the interstellar medium. In the nearby galaxy M31, we measure a strong radial variation of [C II]/TIR th…
On the link between martian total ozone and potential vorticity
Holmes, James A.; Lewis, Stephen R.; Patel, Manish R.
We demonstrate for the first time that total ozone in the martian atmosphere is highly correlated with the dynamical tracer, potential vorticity, under certain conditions. The degree of correlation is investigated using a Mars global circulation model including a photochemical model. Potential vorticity is the quantity of choice to explore the dyn…
Red Supergiants in the Inner Galaxy: Stellar Properties
Menten, Karl M.; Zhu, Qingfeng; Kudritzki, Rolf-Peter +4 more
Red supergiants (RSGs) are luminous cool stars detectable in disks of distant spirals. About a thousand are known in the Galaxy. Here, we analyze a sample of late-type stars recently observed by Messineo et al. in the inner Galaxy (10^\circ < l< 60^\circ ). A total of 58 targets (25% of previously known RSGs) were reported as supergiants bas…
CO Spectral Line Energy Distributions in Galactic Sources: Empirical Interpretation of Extragalactic Observations
Schilke, P.; Lis, D. C.; Bergin, E. A. +5 more
The relative populations in rotational transitions of CO can be useful for inferring gas conditions and excitation mechanisms at work in the interstellar medium. We present CO emission lines from rotational transitions observed with Herschel/HIFI in the star-forming cores Orion S, Orion KL, Sgr B2(M), and W49N. Integrated line fluxes from these ob…
Strongly coupled dark energy with warm dark matter vs. LCDM
Bonometto, S. A.; Mezzetti, M.; Mainini, R.
Cosmologies including strongly Coupled (SC) Dark Energy (DE) and Warm dark matter (SCDEW) are based on a conformally invariant (CI) attractor solution modifying the early radiative expansion. Then, aside of radiation, a kinetic field Φ and a DM component account for a stationary fraction, ~ 1 %, of the total energy. Most SCDEW predictions are hard…
Infrared Spectroscopy of HR 4796A's Bright Outer Cometary Ring + Tenuous Inner Hot Dust Cloud
Sitko, M. L.; Marengo, M.; Chen, C. H. +4 more
We have obtained new NASA/IRTF SpeX spectra of the HR 4796A debris ring system. We find a unique red excess flux that extends out to ∼9 µm in Spitzer IRS spectra, where thermal emission from cold, ∼100 K dust from the system's ring at ∼75 au takes over. Matching imaging ring photometry, we find the excess consists of NIR reflectance from the…
A Six-planet System around the Star HD 34445
Butler, R. Paul; Vogt, Steven S.; Crane, Jeffrey D. +10 more
We present a new precision radial velocity (RV) data set that reveals a multi-planet system orbiting the G0V star HD 34445. Our 18-year span consists of 333 precision RV observations, 56 of which were previously published and 277 of which are new data from the Keck Observatory, Magellan at Las Campanas Observatory, and the Automated Planet Finder …
Debris flow recurrence periods and multi-temporal observations of colluvial fan evolution in central Spitsbergen (Svalbard)
Hiesinger, H.; Hauber, E.; Johnsson, A. +2 more
Fan-shaped accumulations of debris flow deposits are common landforms in polar regions such as Svalbard. Although depositional processes in these environments are of high interest to climate as well as Mars-analog research, several parameters, e.g., debris flow recurrence periods, remain poorly constrained. Here, we present an investigation based …