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Constraining the Dust Coma Properties of Comet C/Siding Spring (2013 a1) at Large Heliocentric Distances
Samarasinha, Nalin H.; A'Hearn, Michael F.; Li, Jian-Yang +5 more
The close encounter of comet C/2013 A1 (Siding Spring) with Mars on 2014 October 19 presented an extremely rare opportunity to obtain the first flyby quality data of the nucleus and inner coma of a dynamically new comet. However, the comet's dust tail potentially posed an impact hazard to those spacecraft orbiting Mars. To characterize the comet a…
Probing the circumnuclear stellar populations of starburst galaxies in the near-infrared
Pastoriza, M. G.; Hernandez-Jimenez, J. A.; Riffel, R. +3 more
We employ the NASA Infrared Telescope Facility's near-infrared spectrograph SpeX at 0.8-2.4 µm to investigate the spatial distribution of the stellar populations (SPs) in the four well-known starburst galaxies: NGC 34, NGC 1614, NGC 3310 and NGC 7714. We use the STARLIGHT code updated with the synthetic simple SPs models computed by Maraston…
The water production rate of Rosetta target Comet 67P/Churyumov-Gerasimenko near perihelion in 1996, 2002 and 2009 from Lyman α observations with SWAN/SOHO
Schmidt, W.; Bertaux, J. -L.; Combi, M. R. +1 more
We report here the observations of the hydrogen cloud in Lyman alpha emission of Comet 67P/Churyumov-Gerasimenko at the last three passages through its perihelion, in 1996, 2002 and 2009. This comet became the target of ESA space mission Rosetta in 2003, and is therefore of particular interest. The data were collected with the SWAN instrument on b…
Phobos: Observed bulk properties
Pätzold, Martin; Dehant, Véronique; Rosenblatt, Pascal +2 more
This work is a review of the mass determinations of the Mars moon Phobos by spacecraft close flybys, by solving for the Martian gravity field and by the analysis of secular orbit perturbations. The absolute value and accuracy is sensitive on the knowledge and accuracy of the Phobos ephemeris, of the spacecraft orbit, other perturbing forces acting…
Herschel SPIRE and PACS observations of the red supergiant VY CMa: analysis of the molecular line spectra
Blommaert, J. A. D. L.; Matsuura, Mikako; Barlow, M. J. +10 more
We present an analysis of the far-infrared and submillimetre molecular emission-line spectrum of the luminous M-supergiant VY CMa, observed with the Spectral and Photometric Imaging Receiver (SPIRE) and Photodetector Array Camera and Spectrometer for Herschel spectrometers aboard the Herschel Space Observatory. Over 260 emission lines were detecte…
Near-infrared spectroscopy of M dwarfs. I. CO molecule as an abundance indicator of carbon†
Tsuji, Takashi; Nakajima, Tadashi
Based on the near-infrared spectra of 42 M dwarfs, carbon abundances are determined from the ro-vibrational lines of the CO (2-0) band. We apply Teff values based on the angular diameters if available or use the Teff values in a log Teff-M3.4 relation (M3.4 is the absolute magnitude at 3.4 &mi…
The lens feature on the inner saturnian satellites
Krupp, N.; Roussos, E.; Hendrix, A. R. +12 more
We have modeled an electron precipitation pattern expected on Mimas, Tethys, and Dione, using two different approaches. In the first approach, we adapt a previously developed model to compute an integrated energy flux into the surfaces of Mimas, Tethys, and Dione. This is a guiding-center, bounce-averaged model. In the second approach, we track in…
A subarcsecond study of the hot molecular core in G023.01-00.41
Menten, K. M.; Sanna, A.; Molinari, S. +5 more
Context. Searching for disk-outflow systems in massive star-forming regions is a key to assessing the main physical processes in the recipe of massive star formation.
Aims: We have selected a hot molecular core (HMC) in the high-mass star-forming region G023.01-00.41, where VLBI multi-epoch observations of water and methanol masers have sugge…
J- and H-band Imaging of AKARI North Ecliptic Pole Survey Field
Im, Myungshin; Matsuhara, Hideo; Lee, Hyung Mok +2 more
We present the J- and H-band source catalog covering the AKARI North Ecliptic Pole field. Filling the gap between the optical data from other follow-up observations and mid-infrared (MIR) data from AKARI, our near-infrared (NIR) data provides contiguous wavelength coverage from optical to MIR. For the J- and H-band imaging, we used the FLoridA Mul…
How Can Active Region Plasma Escape into the Solar Wind from Below a Closed Helmet Streamer?
Pick, M.; Mandrini, C. H.; van Driel-Gesztelyi, L. +6 more
Recent studies show that active-region (AR) upflowing plasma, observed by the EUV-Imaging Spectrometer (EIS) onboard Hinode, can gain access to open-field lines and be released into the solar wind (SW) via magnetic-interchange reconnection at magnetic null-points in pseudo-streamer configurations. When only one bipolar AR is present on the Sun and…