231 citations · 463 across the 17 of their papers we have counts for
17 papers
Characterization and Absolute Calibration of the Far Infrared Field Integral Line Spectrometer for SOFIA
Dario Fadda, Sebastian Colditz, Christian Fischer +7
We present the characterization and definitive flux calibration of the Far-Infrared Field Integral Line Spectrometer (FIFI-LS) instrument on-board SOFIA. The work is based on measu…
Far-infrared line emission from the outer Galaxy cluster Gy 3-7 with SOFIA/FIFI-LS: Physical conditions and UV fields
N. Le, A. Karska, M. Figueira +13
(abridged) Far-infrared (FIR) line emission provides key information about the gas cooling and heating due to shocks and UV radiation associated with the early stages of star forma…
The PDR fronts in M17-SW localized with FIFI-LS onboard SOFIA
Randolf Klein, Alexander Reedy, Christian Fischer +5
To understand star formation rates, studying feedback mechanisms that regulate star formation is necessary. The radiation emitted by nascent massive stars play a significant role i…
Infrared view of the multiphase ISM in NGC 253 I. Observations and fundamental parameters of the ionised gas
André Beck, Vianney Lebouteiller, Suzanne Madden +7
Context. Massive star-formation leads to enrichment with heavy elements of the interstellar medium. On the other hand, the abundance of heavy elements is a key parameter to study t…
SOFIA observations of far-IR fine-structure lines in galaxies to measure metallicity
Luigi Spinoglio, Juan Antonio Fernandez-Ontiveros, Matthew A. Malkan +8
We present new and archival SOFIA FIFI-LS far-IR spectroscopic observations of 25 local galaxies of either the [OIII]52um and/or the [NIII]57um lines. Including other 31 galaxies f…
Brown dwarfs as ideal candidates for detecting UV aurora outside the Solar System: Hubble Space Telescope observations of 2MASS J1237+6526
Joachim Saur, Clarissa Willmes, Christian Fischer +5
Context: Observations of auroral emissions are powerful means to remotely sense the space plasma environment around planetary bodies and ultracool dwarfs. Therefore successful sear…
Evolution of the atomic component in protostellar outflows
T. Sperling, J. Eislöffel, B. Nisini +3
We present SOFIA/FIFI-LS observations of three Class 0 and one Class I outflows (Cep E, HH 1, HH 212, and L1551 IRS5) in the far-infrared [O I]63mum and [O I]145mum transitions. Sp…
Infrared observations of the flaring maser source G358.93-0.03 -- SOFIA confirms an accretion burst from a massive young stellar object
B. Stecklum, V. Wolf, H. Linz +24
Class II methanol masers are signs of massive young stellar objects (MYSOs). Recent findings show that MYSO accretion bursts cause flares of these masers. Thus, maser monitoring ca…
A SOFIA Survey of [CII] in the galaxy M51 II. [CII] and CO kinematics across spiral arms
Jorge L. Pineda, Juergen Stutzki, Christof Buchbender +10
We present the first complete, velocity-resolved [CII] 158um image of the M51 grand-design spiral galaxy, observed with the upGREAT instrument on SOFIA. [CII] is an important trace…
The CO-dark molecular gas mass in 30 Doradus
Mélanie Chevance, Suzanne C. Madden, Christian Fischer +16
Determining the efficiency with which gas is converted into stars in galaxies requires an accurate determination of the total reservoir of molecular gas mass. However, despite bein…
The Close AGN Reference Survey (CARS). Discovery of a global [CII] 158 m line excess in AGN HE1353-1917
I. Smirnova-Pinchukova, B. Husemann, G. Busch +15
The [CII]158m line is one of the strongest far-infrared (FIR) lines and an important coolant in the interstellar medium of galaxies that is accessible out to high redshifts. The…
Time-variable electromagnetic star-planet interaction: The TRAPPIST-1 system as an exemplary case
Christian Fischer, Joachim Saur
Exoplanets sufficiently close to their host star can in principle couple electrodynamically to the star. This process is known as electrodynamic star-planet interaction (SPI). The…
A SOFIA Survey of [CII] in the galaxy M51 I. [CII] as a tracer of Star Formation
Jorge L. Pineda, Christian Fischer, Maria Kapala +12
We present a [CII] 158um map of the entire M51 (including M51b) grand--design spiral galaxy observed with the FIFI-LS instrument on SOFIA. We compare the [CII] emission with the to…
Jet-related Excitation of the [CII] Emission in the Active Galaxy NGC 4258 with SOFIA
Philip Appleton, Tanio Diaz-Santos, Dario Fadda +7
We detect widespread [CII]157.7um emission from the inner 5 kpc of the active galaxy NGC 4258 with the SOFIA integral field spectrometer FIFI-LS. The emission is found associated w…
The Close AGN Reference Survey (CARS): SOFIA detects spatially-resolved [CII] emission in the luminous AGN HE0433-1028
G. Busch, B. Husemann, I. Smirnova-Pinchukova +18
We report spatially-resolved [CII] m observations of HE 0433-1028, which is the first detection of a nearby luminous AGN (redshift 0.0355) with FIFI-LS onboard the airborn…
The UV spectrum of the Ultracool Dwarf LSR J1835+3259 observed with the Hubble Space Telescope
Joachim Saur, Christian Fischer, Alexandre Wennmacher +4
An interesting question about ultracool dwarfs recently raised in the literature is whether their emission is purely internally driven or partially powered by external processes si…
Disk-mediated accretion burst in a high-mass young stellar object
A. Caratti o Garatti, B. Stecklum, R. Garcia Lopez +13
Solar-mass stars form via circumstellar disk accretion (disk-mediated accretion). Recent findings indicate that this process is likely episodic in the form of accretion bursts, pos…