Search Publications
Spatially Resolved C III] λ1909 Emission in Haro 11
Hayes, Matthew; Inoue, Akio K.; Östlin, Göran +7 more
The C III] 1909 (hereafter C III]) line is the strongest ultraviolet emission line after Lyα and is therefore of interest to high-redshift studies of star-forming (SF) galaxies near the epoch of reionization. It is thought that C III] emission is strongest in galaxies with subsolar metallicity and low mass; however, spectral observations of numero…
The Hubble Space Telescope Advanced Camera for Surveys Emission Line Survey of Andromeda. I. Classical Be Stars
Dalcanton, J. J.; Choi, Y.; Johnson, L. C. +9 more
We present results from a two epoch Hubble Space Telescope Hα emission line survey of the Andromeda galaxy that overlaps the footprint of the Panchromatic Hubble Andromeda Treasury (PHAT) survey. We found 552 (542) classical Be stars and 8429 (8556) normal B-type stars in epoch # 1 (epoch # 2), yielding an overall fractional Be content of 6.15% ± …
Long-term Near-infrared Brightening of Nonvariable OH/IR Stars
Mito, Hiroyuki; Nakada, Yoshikazu; Ita, Yoshifusa +8 more
Nonvariable OH/IR stars are thought to have just left the asymptotic giant branch (AGB) phase. In this conventional picture, they must still show strong circumstellar extinction caused by the dust ejected during the AGB phase, and the extinction is expected to decrease over time because of the dispersal of the circumstellar dust after the cessatio…
Measurements of Magnetic Field Fluctuations for Plasma Wave Investigation by the Search Coil Magnetometers (SCM) Onboard Bepicolombo Mio (Mercury Magnetospheric Orbiter)
Sahraoui, Fouad; Le Contel, Olivier; Kasaba, Yasumasa +15 more
This paper describes the design and performance of the search coil magnetometers (SCM), which are part of the Plasma Wave Investigation (PWI) instrument onboard the BepiColombo/Mio spacecraft (Mercury Magnetospheric Orbiter), which will measure the electric field, plasma waves and radio waves for the first time in Mercury's plasma environment. The…
Herschel 158 µm [{C} {II}}] Observations of "CO-dark" Gas in the Perseus Giant Molecular Cloud
Stanimirović, Snežana; Lee, Min-Young; Wolfire, Mark +2 more
We present observations of velocity-resolved [C II] 158 µm emission from both a dense and a more diffuse photodissociation region (PDR) in the Perseus giant molecular cloud using the Heterodyne Instrument for the Far-Infrared on board the Herschel Space Telescope. We detect [C II] emission from 80% of the total positions, with a 95% detectio…
Mars Express Observations of Cold Plasma Structures in the Martian Magnetotail
Lester, M.; Edberg, N. J. T.; Andrews, D. J. +5 more
We present observations from five Mars Express (MEX) orbits in September 2016 while the spacecraft passed through the Martian induced magnetotail at altitudes up to 3,500 km. On these orbits, the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) instrument was operated in Active Ionospheric Sounding (AIS) mode at much higher alti…
Turbulence in the near-Venusian space: Venus Express observations
Zhang, TieLong; Xiao, SuDong; Wu, MingYu +3 more
Velocity-inverted Three-dimensional Distribution of the Gas Clouds in the Type 2 AGN NGC 1068
Kishimoto, Makoto; Miyauchi, Ryuji
Spatially resolved velocity maps at high resolutions of 1-10 pc are becoming available for many nearby active galactic nuclei (AGNs) in both optical/infrared atomic emission lines and submillimeter molecular lines. For the former, it is known that a linear relationship appears to exist between the velocity of the ionized gas clouds and the distanc…
Evidence for radially independent size growth of early-type galaxies in clusters
Andreon, S.
It is not well understood whether the growth of early-type cluster galaxies proceeds inside-out, outside-in, or at the same pace at all radii. In this work we measured the galaxy size, defined by the radius including 80% of the galaxy light, non-parametrically. We also determined a non-parametric estimate of galaxy light concentration, which measu…
The effect of pulsation on the near-ultraviolet spectrum of AGB stars
Guerrero, Martín A.; Ortiz, Roberto
Pulsating and non-pulsating asymptotic giant branch (AGB) stars exhibit a variable near-ultraviolet (near-UV) spectrum, which suggest that mechanisms other than pulsation may affect their near-UV spectrum. In this work, we analyse the near-UV spectra of two groups of AGB stars: (1) regularly pulsating and (2) irregular, small-amplitude stars. Near…