471 citations · 3.3k across the 48 of their papers we have counts for
37 papers · 1 filter
Unveiling the formation of the massive DR21 ridge
L. Bonne, S. Bontemps, N. Schneider +10
We present new CO(1-0), CO(1-0), HCO(1-0) and HCO(1-0) maps from the IRAM 30m telescope, and a spectrally-resolved [CII] 158 m map observed with…
Ionized carbon as a tracer of the assembly of interstellar clouds
Nicola Schneider, Lars Bonne, Sylvain Bontemps +9
Molecular hydrogen clouds are a key component of the interstellar medium because they are the birthplaces for stars. They are embedded in atomic gas that pervades the interstellar…
Searching for converging flows of atomic gas onto a molecular cloud
Mark Heyer, Paul F. Goldsmith, Robert Simon +2
We present new observations of [CII] fine structure line emission from an isolated molecular cloud using the upGREAT instrument onboard SOFIA. These data are analyzed together with…
SOFIA FEEDBACK survey: PDR diagnostics of stellar feedback in different regions of RCW 49
M. Tiwari, M. Wolfire, M. W. Pound +13
We quantified the effects of stellar feedback in RCW 49 by determining the physical conditions in different regions using the [CII] 158 m and [OI] 63 m observations from SOFI…
The SOFIA FEEDBACK Legacy Survey: Dynamics and mass ejection in the bipolar HII region RCW 36
L. Bonne, N. Schneider, P. García +20
We present [CII] 158 m and [OI] 63 m observations of the bipolar HII region RCW 36 in the Vela C molecular cloud, obtained within the SOFIA legacy project FEEDBACK, which is…
FEEDBACK from the NGC7538 HII region
H. Beuther, N. Schneider, R. Simon +10
Context: How do expanding HII regions interact with their environmental cloud? This is one of the central questions driving the SOFIA legacy program FEEDBACK. Here, we present a ca…
Self-absorption in [CII], CO, and HI in RCW120. Building up a geometrical and physical model of the region
S. Kabanovic, N. Schneider, V. Ossenkopf-Okada +19
Revealing the 3D dynamics of HII regions and their associated molecular clouds is important for understanding the longstanding problem as to how stellar feedback affects the densit…
SOFIA-upGREAT imaging spectroscopy of the [C II] 158um fine structure line of the Sgr B region in the Galactic center
A. I. Harris, R. Güsten, M. A. Requena-Torres +8
We report SOFIA-upGREAT spectroscopic imaging of the [C II] 158um spectral line, as well as a number of [O I] 63um spectra, across a 67x45 pc field toward the Sgr B region in our G…
Stellar feedback and triggered star formation in the prototypical bubble RCW 120
Matteo Luisi, Loren D. Anderson, Nicola Schneider +17
Radiative and mechanical feedback of massive stars regulates star formation and galaxy evolution. Positive feedback triggers the creation of new stars by collecting dense shells of…
SOFIA FEEDBACK survey: exploring the dynamics of the stellar wind driven shell of RCW 49
M. Tiwari, R. Karim, M. W. Pound +13
We unveil the stellar wind driven shell of the luminous massive star-forming region of RCW 49 using SOFIA FEEDBACK observations of the [CII] 158 m line. The complementary datase…
Warm ISM in the Sgr A Complex. II. The [C/N] abundance ratio traced by [CII] 158 um and [NII] 205 um observations toward the Arched Filaments at the Galactic center
P. García, N. Abel, M. Röllig +2
Aims. We aim to investigate the I([CII]) versus I([NII]) integrated intensity behavior in the AF region in order to assess the [CII] emission contribution from the H II region, whi…
FEEDBACK: a SOFIA Legacy Program to Study Stellar Feedback in Regions of Massive Star Formation
N. Schneider, R. Simon, C. Guevara +37
FEEDBACK is a SOFIA legacy program dedicated to study the interaction of massive stars with their environment. It performs a survey of 11 galactic high mass star forming regions in…
Large-scale Map of Millimeter-wavelength Hydrogen Radio Recombination Lines around a Young Massive Star Cluster
Q. Nguyen-Luong, L. D. Anderson, L. D. +19
We report the first map of large-scale (10 pc in length) emission of millimeter-wavelength hydrogen recombination lines (mm-RRLs) toward the giant H II region around the W43-Main y…
Dense gas formation in the Musca filament due to the dissipation of a supersonic converging flow
L. Bonne, N. Schneider, S. Bontemps +9
Observations with the Herschel Space Telescope have established that most of the star forming gas is organised in interstellar filaments, a finding that is supported by numerical s…
First detection of the carbon chain molecules 13CCC and C13CC towards SgrB2(M)
Thomas F. Giesen, Bhaswati Mookerjea, Guido W. Fuchs +4
We report the first detection of the isotopologues 13CCC and C13CC. We used the heterodyne receivers GREAT and upGREAT on board SOFIA to search for the ro-vibrational transitions Q…
Astro2020: The Cycling of Matter from the Interstellar Medium to Stars and back
Robert Simon, Nicola Schneider, Frank Bigiel +15
Understanding the matter cycle in the interstellar medium of galaxies from the assembly of clouds to star formation and stellar feedback remains an important and exciting field in…
Unveiling the chemistry of interstellar CH: Spectroscopy of the 2 THz ground state line
Helmut Wiesemeyer, Rolf Güsten, Karl M. Menten +6
The methylidyne radical CH is commonly used as a proxy for H in the cold, neutral phase of the interstellar medium. The optical spectroscopy of CH is limited by interstellar ex…
First detection of THz water maser in NGC7538-IRS1 with SOFIA and new 22 GHz e-MERLIN maps
F. Herpin, A. Baudry, A. M. S. Richards +7
The formation of massive stars is still not well understood. Accumulating a large amount of mass infalling within a single entity in spite of radiation pressure is possible if, amo…
Warm ISM in the Sgr A Complex. I: Mid-J CO, atomic carbon, ionized atomic carbon,and ionized nitrogen sub-mm/FIR line observations with the Herschel-HIFI and NANTEN2/SMART telescopes
P. García, R. Simon, J. Stutzki +3
We present large-scale submm observations towards the Sgr A Complex covering ~300 arcmin2. These data were obtained in the frame of the HEXGAL Program with the Herschel-HIFI satell…
Carbon gas in SMC low-metallicity star-forming regions
M. A. Requena-Torres, F. P. Israel, Y. Okada +5
This paper presents [CII], [CI] and CO emission line maps of the star-forming regions N66, N25+N26, and N88 in the metal-poor Local Group dwarf galaxy SMC. The spatial and velocity…
Far-infrared study of tracers of oxygen chemistry in diffuse clouds
H. Wiesemeyer, R. Güsten, S. Heyminck +8
Context. The chemistry of the diffuse interstellar medium rests upon three pillars: exothermic ion-neutral reactions (" cold chemistry "), endothermic neutral-neutral reactions wit…
Understanding star formation in molecular clouds III. Probability distribution functions of molecular lines in Cygnus X
N. Schneider, S. Bontemps, F. Motte +11
Column density (N) PDFs serve as a powerful tool to characterize the physical processes that influence the structure of molecular clouds. Star-forming clouds can best be characteri…
The fine structure line deficit in S 140
Volker Ossenkopf, Evgenia Koumpia, Yoko Okada +5
We try to understand the gas heating and cooling in the S 140 star forming region by spatially and spectrally resolving the distribution of the main cooling lines with GREAT/SOFIA.…
Tracing H2 column density with atomic carbon (CI) and CO isotopologues
N. Lo, M. R. Cunningham, P. A. Jones +6
We present first results of neutral carbon ([CI], 3P1 - 3P0 at 492 GHz) and carbon monoxide (13CO, J = 1 - 0) mapping in the Vela Molecular Ridge cloud C (VMR-C) and G333 giant mol…