Publications (31)
Detailed Studies of Cloud Cores: Probing the Initial Conditions for Protostellar Collapse
Philippe Andre, Arnaud Belloche, Patrick Hennebelle +1
Improving our understanding of the earliest stages of star formation is crucial to gain insight into the origin of stellar masses, multiple systems, and protoplanetary disks. We di…
Submillimeter Studies of Prestellar Cores and Protostars: Probing the Initial Conditions for Protostellar Collapse
Philippe Andre, Jeroen Bouwman, Arnaud Belloche +1
Improving our understanding of the initial conditions and earliest stages of protostellar collapse is crucial to gain insight into the origin of stellar masses, multiple systems, a…
The Structure of Prestellar Cores as derived from ISO Observations
Aurore Bacmann, Philippe Andre, Derek Ward-Thompson
Observations of dark cloud cores have been carried out in the mid-infrared using ISOCAM and in the far-infrared using ISOPHOT, both aboard the Infrared Space Observatory. The cores…
Quiescent Dense Gas in Protostellar Clusters: the Ophiuchus A Core
James Di Francesco, Philippe Andre, Philip C. Myers
We present combined BIMA interferometer and IRAM 30 m Telescope data of N2H+ 1-0 line emission across the nearby dense, star forming core Ophiuchus A (Oph A) at high linear resolut…
A Tale of Three: Magnetic Fields along the Orion Integral-Shaped Filament as Revealed by JCMT BISTRO survey
Jintai Wu, Keping Qiu, Frederick Poidevin +152
As part of the BISTRO survey, we present JCMT 850 m polarimetric observations towards the Orion Integral-Shaped Filament (ISF) that covers three portions known as OMC-1, OMC-2,…
Disappearance of N2H+ from the Gas Phase in the Class 0 Protostar IRAM 04191
Arnaud Belloche, Philippe Andre
We present a high-resolution millimeter study of the very young Class 0 protostar IRAM 04191+1522 in the Taurus molecular cloud. N2H+(1-0) observations with the IRAM Plateau de Bur…
Probing the filamentary nature of star formation in the California giant molecular cloud
Guo-Yin Zhang, Philippe Andre, Alexander Menshchikov +1
Recent studies suggest that filamentary structures are representative of the initial conditions of star formation in molecular clouds and support a filament paradigm for star forma…
Wide-field (sub)millimeter continuum surveys of protoclusters: Clues to the origin of the IMF
Frederique Motte, Philippe Andre
Recent (sub)millimeter continuum surveys of nearby star-forming regions have revealed a wealth of new, cold cloud fragments. Those which are small-scale (diameter < 10000 AU), star…
The JCMT BISTRO Survey: Studying the Complex Magnetic Field of L43
Janik Karoly, Derek Ward-Thompson, Kate Pattle +155
We present observations of polarized dust emission at 850 m from the L43 molecular cloud which sits in the Ophiuchus cloud complex. The data were taken using SCUBA-2/POL-2 on t…
Determination of the far-infrared dust opacity in a prestellar core
Aleksi Suutarinen, Lauri K. Haikala, Jorma Harju +5
(abridged) We correlated near-infrared stellar H-Ks colour excesses of background stars from NTT/SOFI with the far-IR optical depth map, tauFIR, derived from Herschel 160, 250, 350…
Variation of the Core Lifetime and Fragmentation Scale in Molecular Clouds as an Indication of Ambipolar Diffusion
Indrani Das, Shantanu Basu, Philippe Andre
Ambipolar diffusion likely plays a pivotal role in the formation and evolution of dense cores in weakly-ionized molecular clouds. Linear analyses show that the evolutionary times a…
Low dust emissivities and radial variations in the envelopes of Class 0 protostars: a signature of early grain growth?
Maud Galametz, Anaelle J. Maury, Valeska Valdivia +3
Analyzing the properties of dust and its evolution in the early phases of star formation is crucial to put constraints on the collapse and accretion processes as well as on the pri…
The formation of active protoclusters in the Aquila Rift: A millimeter continuum view
Anaelle Maury, Philippe Andre, Alexander Men'shchikov +2
Abridged -- We present an analysis of the Aquila Rift complex which addresses the questions of the star formation rate (SFR), star formation efficiency (SFE) and typical lifetime o…
X-rays and regions of star formation: a combined ROSAT-HRI/near-to-mid IR study of the rho Oph dark cloud
Nicolas Grosso, Thierry Montmerle, Sylvain Bontemps +2
We have obtained two deep exposures of the rho Oph cloud core region with the ROSAT HRI. The improved position accuracy (1"-6") with respect to previous recent X-ray observations (…
A First Look at the Auriga-California Giant Molecular Cloud With Herschel and the CSO: Census of the Young Stellar Objects and the Dense Gas
Paul M. Harvey, Cassandra Fallscheer, Adam Ginsburg +7
We have mapped the Auriga/California molecular cloud with the Herschel PACS and SPIRE cameras and the Bolocam 1.1 mm camera on the Caltech Submillimeter Observatory (CSO) with the…
A study on the use of the PACS bolometer arrays for submillimeter ground-based telescopes
Vincent Reveret, Louis R. Rodriguez, Philippe Andre +3
A new kind of bolometric architecture has been successfully developed for the PACS photometer onboard the Herschel submillimeter observatory. These new generation CCD-like arrays a…
First BISTRO observations of the dark cloud Taurus L1495A-B10: the role of the magnetic field in the earliest stages of low-mass star formation
Derek Ward-Thompson, Janik Karoly, Kate Pattle +155
We present BISTRO Survey 850 μm dust emission polarisation observations of the L1495A-B10 region of the Taurus molecular cloud, taken at the JCMT. We observe a roughly triangular…
Protostars, multiplicity, and disk evolution in the Corona Australis region: A Herschel Gould Belt Study
Aurora Sicilia-Aguilar, Thomas Henning, Hendrik Linz +4
The CrA region and the Coronet cluster form a nearby (138 pc), young (1-2 Myr) star-forming region hosting a moderate population of YSO. We present Herschel PACS photometry at 100…
From Pre-Stellar Cores to Protostars: The Initial Conditions of Star Formation
Philippe Andre, Derek Ward-Thompson, Mary Barsony
The last decade has witnessed significant advances in our observational understanding of the earliest stages of low-mass star formation. The advent of sensitive receivers on large…
The JCMT BISTRO Survey: A Spiral Magnetic Field in a Hub-filament Structure, Monoceros R2
Jihye Hwang, Jongsoo Kim, Kate Pattle +157
We present and analyze observations of polarized dust emission at 850 m towards the central 1 pc 1 pc hub-filament structure of Monoceros R2 (Mon R2). The data are obt…
PRISM (Polarized Radiation Imaging and Spectroscopy Mission): A White Paper on the Ultimate Polarimetric Spectro-Imaging of the Microwave and Far-Infrared Sky
PRISM Collaboration, Philippe Andre, Carlo Baccigalupi +101
PRISM (Polarized Radiation Imaging and Spectroscopy Mission) was proposed to ESA in response to the Call for White Papers for the definition of the L2 and L3 Missions in the ESA Sc…
Filaments and ridges in Vela C revealed by Herschel: from low-mass to high-mass star-forming sites
Tracey Hill, Frederique Motte, Pierre Didelon +29
We present the first Herschel PACS and SPIRE results of the Vela C molecular complex in the far-infrared and submillimetre regimes at 70, 160, 250, 350, and 500 um, spanning the pe…
Magnetic fields towards Ophiuchus-B derived from SCUBA-2 polarization measurements
Archana Soam, Kate Pattle, Derek Ward-Thompson +121
We present the results of dust emission polarization measurements of Ophiuchus-B (Oph-B) carried out using the Submillimetre Common-User Bolometer Array 2 (SCUBA-2) camera with its…
The lower limits of disc fragmentation and the prospects for observing fragmenting discs
Dimitris Stamatellos, Anaelle Maury, Anthony Whitworth +1
A large fraction of brown dwarfs and low-mass H-burning stars may form by gravitational fragmentation of protostellar discs. We explore the conditions for disc fragmentation and we…
The Kinematic and Chemical Properties of a Potential Core-Forming Clump: Perseus B1-E
Sarah I. Sadavoy, Yancy Shirley, James Di Francesco +4
We present 13CO and C18O (1-0), (2-1), and (3-2) maps towards the core-forming Perseus B1-E clump using observations from the James Clerk Maxwell Telescope (JCMT), Submillimeter Te…
Core Mass Function: The Role of Gravity
Sami Dib, Axel Brandenburg, Jongsoo Kim +2
We analyze the mass distribution of cores formed in an isothermal, magnetized, turbulent, and self-gravitating nearly critical molecular cloud model. Cores are identified at two de…
The JCMT BISTRO-2 Survey: Magnetic Fields of the Massive DR21 Filament
Tao-Chung Ching, Keping Qiu, Di Li +154
We present 850 m dust polarization observations of the massive DR21 filament from the B-fields In STar-forming Region Observations (BISTRO) survey, using the POL-2 polarimeter…
Observations of magnetic fields surrounding LkH 101 taken by the BISTRO survey with JCMT-POL-2
Nguyen Bich Ngoc, Pham Ngoc Diep, Harriet Parsons +146
We report the first high spatial resolution measurement of magnetic fields surrounding LkH 101, a part of the Auriga-California molecular cloud. The observations were taken wit…
Changes Of Dust Opacity With Density in the Orion A Molecular Cloud
Arabindo Roy, Peter G. Martin, Danae Polychroni +12
We have studied the opacity of dust grains at submillimeter wavelengths by estimating the optical depth from imaging at 160, 250, 350, and 500 um from the Herschel Gould Belt Surve…
An ISOCAM Absorption Survey of the Structure of Pre-stellar Cloud Cores
Aurore Bacmann, Philippe Andre, Jean-Loup Puget +3
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 ab…
A First Look at BISTRO Observations of The Oph-A core
Jungmi Kwon, Yasuo Doi, Motohide Tamura +119
We present 850 m imaging polarimetry data of the Oph-A core taken with the Submillimeter Common-User Bolometer Array-2 (SCUBA-2) and its polarimeter (POL-2), as part of ou…