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相关论文: [CII] emission from L1630 in the Orion B molecular…

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Of the almost 40 star forming galaxies at z>~5 (not counting QSOs) observed in [CII] to date, nearly half are either very faint in [CII], or not detected at all, and fall well below expectations based on locally derived relations between…

星系天体物理 · 物理学 2017-09-13 K. P. Olsen , T. R. Greve , D. Narayanan , R. Thompson , R. Davé , L. N. Rios , S. Stawinski

Strong winds and ultraviolet (UV) radiation from O-type stars disrupt and ionize their molecular core birthplaces, sweeping up material into parsec-size shells. Owing to dissociation by starlight, the thinnest shells are expected to host…

We report observations of molecular oxygen (O$_2$) rotational transitions at 487 GHz, 774 GHz, and 1121 GHz toward Orion Peak A. The O2 lines at 487 GHz and 774 GHz are detected at velocities of 10-12 km/s with line widths 3 km/s; however,…

We present 168 arcmin^2 spectral images of the Sgr B2 complex taken with Herschel/SPIRE-FTS. We detect ubiquitous emission from CO (up to J=12-11), H2O, [CI]492, 809 GHz, and [NII] 205 um lines. We also present maps of the SiO, N2H+, HCN,…

星系天体物理 · 物理学 2021-05-12 M. G. Santa-Maria , J. R. Goicoechea , M. Etxaluze , J. Cernicharo , S. Cuadrado

We aim to determine the physical and chemical properties of dense cores in Orion B9. We observed the NH3(1,1) and (2,2), and the N2H+(3-2) lines towards the submm peak positions. These data are used in conjunction with our LABOCA 870 micron…

星系天体物理 · 物理学 2015-05-19 Oskari Miettinen , Jorma Harju , Lauri K. Haikala , Mika Juvela

We have performed an unbiased dense core survey toward the Orion A Giant Molecular Cloud in the C$^{18}$O ($J$=1--0) emission line taken with the Nobeyama Radio Observatory (NRO) 45-m telescope. The effective angular resolution of the map…

The [CII] 158um fine-structure line is the brightest emission line observed in local star-forming galaxies. As a major coolant of the gas-phase interstellar medium, [CII] balances the heating, including that due to far-ultraviolet photons,…

We present HI 21cm observations of the Orion Nebula, obtained with the Karl G. Jansky Very Large Array, at an angular resolution of 7.2"x5.7" and a velocity resolution of 0.77 km/s. Our data reveal HI absorption towards the radio continuum…

星系天体物理 · 物理学 2015-06-12 Paul P. van der Werf , W. M. Goss , C. R. O'Dell

We analyse synthetic maps of the [CII] 158 $\mu$m line and FIR continuum of simulated molecular clouds (MCs) within the SILCC-Zoom project to study the origin of the [CII] deficit, i.e., the drop in the [CII]/FIR intensity ratio. All…

星系天体物理 · 物理学 2024-12-04 Stefano Ebagezio , Daniel Seifried , Stefanie Walch , Thomas G. Bisbas

The giant molecular cloud Orion A is the closest massive star-forming region to earth ($d\sim400$ pc). It contains the rich Orion Nebula Cluster (ONC) in the North, and low-mass star-forming regions (L1641, L1647) to the South. To get a…

星系天体物理 · 物理学 2018-12-20 Josefa E. Großschedl , João Alves , Stefan Meingast , Birgit Hasenberger

(Abridged) The Magellanic Clouds provide a nearby laboratory for metal-poor dwarf galaxies. The low dust abundance enhances the penetration of UV photons into the interstellar medium (ISM), resulting in a relatively larger filling factor of…

宇宙学与河外天体物理 · 物理学 2015-06-11 V. Lebouteiller , D. Cormier , S. C. Madden , F. Galliano , R. Indebetouw , N. Abel , M. Sauvage , S. Hony , A. Contursi , A. Poglitsch , A. Remy , E. Sturm , R. Wu

We present HHT observations in the N=3-2 rotational transition of the CN radical toward selected positions of the Trapezium region and of the molecular Ridge in the Orion molecular cloud. Two of the positions in the Ridge were also observed…

天体物理学 · 物理学 2009-11-06 A. Rodriguez-Franco , T. L. Wilson , . J. Martin-Pintado , A. Fuente

We report on a study of the high-mass star formation in the the HII region W28A2 by investigating the molecular clouds extended over ~5-10 pc from the exciting stars using the 12CO and 13CO (J=1-0) and 12CO (J=2-1) data taken by the NANTEN2…

We present a sub-kpc resolved study of the interstellar medium properties in SDP.81, a z=3.042 strongly gravitationally lensed dusty star-forming galaxy, based on high-resolution, multi-band ALMA observations of the FIR continuum, CO ladder…

星系天体物理 · 物理学 2020-04-15 M. Rybak , J. A. Hodge , S. Vegetti , P. van der Werf , P. Andreani , L. Graziani , J. P. McKean

We present the detection analysis of a diffuse molecular cloud at z$_{abs}$=2.4636 towards the quasar SDSS J1513+0352(z$_{em}\,\simeq$ 2.68) observed with the X-shooter spectrograph(VLT). We measure very high column densities of atomic and…

The central area (40"x40") of the bipolar nebula S106 was mapped in the OI line at 63.2 micron with high angular (6") and spectral resolution, using GREAT on board SOFIA. The OI emission distribution is compared to the CO 16-15, CII 158…

We present 13CO(J=1-0) line emission observations with the Nobeyama 45-m telescope toward the giant HII region NGC 604 in the spiral galaxy M 33. We detected 13CO(J=1-0) line emission in 3 major giant molecular clouds (GMCs) labeled as…

宇宙学与河外天体物理 · 物理学 2015-05-30 Kazuyuki Muraoka , Tomoka Tosaki , Rie Miura , Sachiko Onodera , Nario Kuno , Kouichiro Nakanishi , Hiroyuki Kaneko , Shinya Komugi

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 total far--infrared (TIR) intensity and star formation…

We present new measurements of the ground state fine-structure line of atomic carbon at 492 GHz in a variety of nearby external galaxies, ranging from spiral to irregular, interacting and merging types. In comparison with CO(1-0), the…

天体物理学 · 物理学 2009-10-31 Maryvonne Gerin , Thomas G. Phillips

We present far-IR (57-196 mu) spectra of 21 protostars in the Orion molecular clouds, obtained with the Photodetector Array Camera and Spectrometer (PACS) onboard the Herschel Space observatory, as part of the Herschel Orion Protostar…