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Related papers: The CARMA-NRO Orion Survey: Core Emergence and Kin…

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We report on a preliminary analysis of the diffuse gamma-ray observations of local giant molecular clouds Orion A and B with the Large Area Telescope onboard the Fermi Gamma-ray Space Telescope. The gamma-ray emission of the clouds is well…

High Energy Astrophysical Phenomena · Physics 2019-08-13 Akira Okumura , Tune Kamae

We present the results of a mid-infrared (7 micron) imaging survey of a sample of 24 starless dense cores carried out at an angular resolution of 6 arcsec with the ISOCAM camera aboard the Infrared Space Observatory (ISO). The targeted…

We present observational results of the thermal dust continuum emission and its linear polarization in one of the nearest massive star-forming sites Orion BN/KL in Orion Molecular Cloud-1. The observations were carried out with the…

Astrophysics of Galaxies · Physics 2015-05-19 Ya-Wen Tang , Paul T. P. Ho , Patrick M. Koch , Ramprasad Rao

We present the first search for spinning dust emission from a sample of 34 Galactic cold cores, performed using the CARMA interferometer. For each of our cores we use photometric data from the Herschel Space Observatory to constrain N_{H},…

Submillimeter Array observations of Orion-KL at 1'' resolution in the 440mu/690GHz band reveal new insights about the continuum and line emission of the region. The 440mu continuum flux density measurement from source I allows us to…

[Abridged] We have recently reported on the collapse and fragmentation properties of the northernmost part of this structure, located ~2.4pc north of Orion KL -- the Orion Molecular Cloud 3 (OMC 3, Takahashi et al. 2013). As part of our…

Solar and Stellar Astrophysics · Physics 2016-08-10 P. S. Teixeira , S. Takahashi , L. A. Zapata , P. T. P. Ho

We present Orion A giant molecular cloud core catalogs, which are based on 1.1 mm map with an angular resolution of 36 arcsec (sim 0.07 pc) and C18O (1-0) data with an angular resolution of 26.4 arcsec (sim 0.05 pc). We have cataloged 619…

We use gas temperature and velocity dispersion data from the Green Bank Ammonia Survey and core masses and sizes from the James Clerk Maxwell Telescope Gould Belt Survey to estimate the virial states of dense cores within the Orion A…

We present combined VLA and Green Bank Telescope images of \ammonia\ inversion transitions (1,1) and (2,2) toward OMC2 and OMC3. We focus on the relatively quiescent Orion cores, which are away from the Trapezium cluster and have no sign of…

Astrophysics of Galaxies · Physics 2015-06-05 D. Li , J. Kauffmann , Q. Zhang , W. Chen

We present the discovery of expanding spherical shells around low to intermediate-mass young stars in the Orion A giant molecular cloud using observations of $^{12}$CO (1-0) and $^{13}$CO (1-0) from the Nobeyama Radio Observatory 45-meter…

A high density portion of the Orion Molecular Cloud 1 (OMC-1) contains the prominent, warm Kleinmann-Low (KL) nebula that is internally powered by an energetic event plus a farther region in which intermediate to high mass stars are…

Astrophysics of Galaxies · Physics 2015-06-03 T. -C. Peng , F. Wyrowski , L. A. Zapata , R. Güsten , K. M. Menten

We have observed continuum emission at lambda = 850 microns over ~4 square degrees of the Ophiuchus star-forming cloud using SCUBA on the JCMT, producing a submillimetre continuum map twenty times larger than previous Ophiuchus surveys. Our…

Astrophysics · Physics 2009-11-10 Doug Johnstone , James Di Francesco , Helen Kirk

We present a high angular resolution ($\sim1"$) and wide-field ($2'.9 \times 1'.9$) image of the 1.3-mm continuum, CO($J$ = 2--1) line, and SiO($J$ = 5--4) line emissions toward an embedded protocluster, FIR3, FIR4, and FIR5, in the Orion…

Filaments are a key step on the path that leads from molecular clouds to star formation. However, their characteristics are heavily debated, and the exact processes that lead to their formation and fragmentation into dense cores still…

We investigate the star formation occurring in a region well below the Galactic plane towards the optical reflection nebula ESO 368-8 (IRAS 07383-3325). We confirm the presence of a small young stellar cluster (or aggregate of tens of YSOs)…

Astrophysics of Galaxies · Physics 2015-05-14 Pedro M. Palmeirim , Joao L. Yun

We report on the gamma-ray observations of giant molecular clouds Orion A and B with the Large Area Telescope (LAT) on-board the Fermi Gamma-ray Space Telescope. The gamma-ray emission in the energy band between \sim100 MeV and \sim100 GeV…

High Energy Astrophysical Phenomena · Physics 2012-08-10 M. Ackermann , M. Ajello , A. Allafort , E. Antolini , L. Baldini , J. Ballet , G. Barbiellini , D. Bastieri , K. Bechtol , R. Bellazzini , B. Berenji , R. D. Blandford , E. D. Bloom , E. Bonamente , A. W. Borgland , E. Bottacini , T. J. Brandt , J. Bregeon , M. Brigida , P. Bruel , R. Buehler , S. Buson , G. A. Caliandro , R. A. Cameron , P. A. Caraveo , C. Cecchi , A. Chekhtman , J. Chiang , S. Ciprini , R. Claus , J. Cohen-Tanugi , J. Conrad , F. D'Ammando , A. de Angelis , F. de Palma , C. D. Dermer , E. do Couto e Silva , P. S. Drell , A. Drlica-Wagner , T. Enoto , L. Falletti , C. Favuzzi , S. J. Fegan , E. C. Ferrara , W. B. Focke , Y. Fukazawa , Y. Fukui , P. Fusco , F. Gargano , D. Gasparrini , S. Germani , N. Giglietto , F. Giordano , M. Giroletti , T. Glanzman , G. Godfrey , S. Guiriec , D. Hadasch , Y. Hanabata , A. K. Harding , M. Hayashida , K. Hayashi , D. Horan , X. Hou , R. E. Hughes , M. S. Jackson , G. Jóhannesson , A. S. Johnson , T. Kamae , H. Katagiri , J. Kataoka , M. Kerr , J. Knödlseder , M. Kuss , J. Lande , S. Larsson , S. -H. Lee , F. Longo , F. Loparco , M. N. Lovellette , P. Lubrano , K. Makishima , M. N. Mazziotta , J. Mehault , W. Mitthumsiri , A. A. Moiseev , C. Monte , M. E. Monzani , A. Morselli , I. V. Moskalenko , S. Murgia , T. Nakamori , M. Naumann-Godo , S. Nishino , J. P. Norris , E. Nuss , M. Ohno , T. Ohsugi , A. Okumura , M. Orienti , E. Orlando , J. F. Ormes , M. Ozaki , D. Paneque , J. H. Panetta , D. Parent , V. Pelassa , M. Pesce-Rollins , M. Pierbattista , F. Piron , G. Pivato , T. A. Porter , S. Rainò , M. Razzano , A. Reimer , O. Reimer , M. Roth , H. F. -W. Sadrozinski , C. Sgrò , E. J. Siskind , G. Spandre , P. Spinelli , A. W. Strong , H. Takahashi , T. Takahashi , T. Tanaka , J. G. Thayer , J. B. Thayer , O. Tibolla , M. Tinivella , D. F. Torres , A. Tramacere , E. Troja , Y. Uchiyama , T. L. Usher , J. Vandenbroucke , V. Vasileiou , G. Vianello , V. Vitale , A. P. Waite , P. Wang , B. L. Winer , K. S. Wood , Z. Yang , S. Zimmer

We investigate the intrinsic shapes of starless cores in the Orion GMC, using the prestellar core sample of Nutter and Ward-Thompson (2007), which is based on submillimeter SCUBA data. We employ a maximum-likelihood method to reconstruct…

Astrophysics · Physics 2009-06-23 Konstantinos Tassis

When dense cores in molecular clouds or filamentary structures collapse and form protostars, they may undergo fragmentation and form binary or multiple systems. In this paper, we investigated the key mechanisms influencing fragmentation by…

Astrophysics of Galaxies · Physics 2025-07-31 Jo-Shui Kao , Hsi-Wei Yen , Shih-Ping Lai

Aims: Ices in dense star-forming cores contain the bulk of volatile molecules apart from H2 and thus represent a large fraction of dark cloud chemistry budget.To directly constrain the freeze-out profile of CO, the formation route of CO2…

Astrophysics · Physics 2009-11-11 K. M. Pontoppidan

Progress in understanding star formation requires detailed observational constraints on the initial conditions, i.e. dense clumps and cores in giant molecular clouds that are on the verge of gravitational instability. Such structures have…

Solar and Stellar Astrophysics · Physics 2016-09-23 Wanggi Lim , Jonathan C. Tan