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A 12CO () and () atlas of circumstellar envelopes of AGB and post-AGB stars

We present the results of a 12CO () and () survey on a sample of 46 objects classified as AGB and post-AGB stars. We have obtained fully sampled high resolution maps of their 12CO () emission by combining visibilities from the IRAM interferometer with short spacing observations from the IRAM 30 m telescope. Properties of their circumstellar envelopes like fluxes, radii, and...

A 12CO () and () atlas of circumstellar envelopes of AGB and post-AGB stars

We present the results of a 12CO () and () survey on a sample of 46 objects classified as AGB and post-AGB stars. We have obtained fully sampled high resolution maps of their 12CO () emission by combining visibilities from the IRAM interferometer with short spacing observations from the IRAM 30 m telescope. Properties of their circumstellar envelopes like fluxes, radii, and...

Shedding light on the formation of the pre-biotic molecule formamide with ASAI

, Nobeyama Radio Observatory , p. 181 Hirota T . et al., 2008 , PASJ, 60 , 37 Jaber A. A. , Ceccarelli C. , Kahane C. , Caux E. , 2014 , ApJ, 791 , 29 Jones B. M. , Bennett C. J. Kaiser , Ralf I. , 2011 , ApJ

Detection of complex organic molecules in a prestellar core: a new challenge for astrochemical models

. 2006 , A &A, 455 , 971 Requena-Torres , M. A. , Marcelino , N. , Jiménez-Serra , I. , et al. 2007 , ApJ, 655 , L37 Taquet , V. , Ceccarelli , C. , & Kahane , C. 2012 , A &A, 538 , A42 van Dishoeck, E. F

Water ice deuteration: a tracer of the chemical history of protostars

, 307 Talbi , D. , Chandler , G. , & Rohl , A. 2006 , Chem . Phys., 320 , 214 Taquet , V. , Ceccarelli , C. , & Kahane , C. 2012a , A &A, 538 , A42 Taquet , V. , Ceccarelli , C. , & Kahane , C. 2012b, ApJ

The puzzling deuteration of methanol in low- to high-mass protostars

A&A Astronomy & Astrophysics Letr ot het A. Ratajczak V. Taquet C. Kahane C. Ceccarelli A. Faure E. Quirico Context. The current theory of methanol deuteration on interstellar grains predicts that

The puzzling deuteration of methanol in low- to high-mass protostars

A&A Astronomy & Astrophysics Letr ot het A. Ratajczak V. Taquet C. Kahane C. Ceccarelli A. Faure E. Quirico Context. The current theory of methanol deuteration on interstellar grains predicts that

The submillimeter spectrum of deuterated glycolaldehydes

Context. Glycolaldehyde, a sugar-related interstellar prebiotic molecule, has recently been detected in two star-forming regions, Sgr B2(N) and G31.41+0.31. The detection of this new species increased the list of complex organic molecules detected in the interstellar medium (ISM) and adds another level to the chemical complexity present in space. Besides, this kind of organic...

TIMASSS: the IRAS16293-2422 millimeter and submillimeter spectral survey: tentative detection of deuterated methyl formate (DCOOCH3)

Context. High deuterium fractionation is observed in various types of environments such as prestellar cores, hot cores, and hot corinos. It has proven to be an efficient probe for studying the physical and chemical conditions of these environments. The study of the deuteration of different molecules helps us to understand their formation. This is especially interesting for...

Vocal aging and adductor spasmodic dysphonia: Response to botulinum toxin injection

DR , Malmgren LT , Gacek RR . 1990 . Age-related changes in the neuromuscular junctions in the human posterior cricoarytenoid muscles: a quantitative study . Laryngoscope , 100 : 262 - 8 . Gracco C ... , Kahane JC . 1989 . Age related changes in the vestibular folds of the human larynx. A histomorphometric study . Journal of Voice , 3 : 204 - 12 . Gray SD , Titze IR , Chan R , et al. 1999 . Vocal fold

A λ2 mm molecular line survey of the C-star envelope IRC+10216

The mm-wave spectrum of the C-star envelope IRC+10216 has been continuously surveyed between 129.0 and 172.5 GHz with the IRAM 30-m telescope. 380 lines are detected, of which 317 have been identified. The identified lines arise from 30 different molecules and radicals which, in their vast majority, are not observed in hot and dense interstellar clouds such as Orion A or W3(OH...

A λ2 mm molecular line survey of the C-star envelope IRC+10216

The mm-wave spectrum of the C-star envelope IRC+10216 has been continuously surveyed between 129.0 and 172.5 GHz with the IRAM 30-m telescope. 380 lines are detected, of which 317 have been identified. The identified lines arise from 30 different molecules and radicals which, in their vast majority, are not observed in hot and dense interstellar clouds such as Orion A or W3(OH...

Nuclear spin conversion of formaldehyde in protostar environments induced by non reactive collisions

Context.Formaldehyde is an important diagnostic of the physical conditions in star forming regions. The temperature of formation is determined by measuring the relative abundance of para-H2CO and ortho-H2CO. The key hypothesis for this determination is that the ortho-para interconversion is strictly forbidden once the molecule is formed. However H2CO nuclear spin conversion...

Physical structure of the envelopes of intermediate-mass protostars

Context. Intermediate mass protostars provide a bridge between low- and high-mass protostars. Furthermore, they are an important component of the UV interstellar radiation field. Despite their relevance, little is known about their formation process.Aims. We present a systematic study of the physical structure of five intermediate mass, candidate Class 0 protostars. Our two goals...

Physical structure of the envelopes of intermediate-mass protostars

Context. Intermediate mass protostars provide a bridge between low- and high-mass protostars. Furthermore, they are an important component of the UV interstellar radiation field. Despite their relevance, little is known about their formation process.Aims. We present a systematic study of the physical structure of five intermediate mass, candidate Class 0 protostars. Our two goals...

On the physical structure of IRC +10216 - Ground-based and Herschel observations of CO and C2H

. Waters 4 7 M. A. T. Groenewegen 9 M. J. Barlow 8 M. Guélin 2 12 C. Kahane 13 J. C. Pearson 10 P. Encrenaz 12 R. Szczerba 11 M. R. Schmidt 11 0 LUTH, Observatoire de Paris-Meudon , 5 place Jules Janssen

HDO abundance in the envelope of the solar-type protostar IRAS 16293–2422

We present IRAM 30 m and JCMT observations of HDO lines towards the solar-type protostar IRAS 16293-2422. Five HDO transitions have been detected on-source, and two were unfruitfully searched for towards a bright spot of the outflow of IRAS 16293-2422. We interpret the data by means of the Ceccarelli et al. ([CITE]) model, and derive the HDO abundance in the warm inner and cold...

First detection of ND in the solar-mass protostar IRAS16293-2422

. Bergin G. A. Blake N. Crimier K. Demyk C. Dominik M. Gerin P. Hennebelle C. Kahane A. Klotz G. Melnick P. Schilke V. Wakelam A. Walters A. Baudry T. Bell M. Benedettini A. Boogert S. Cabrit P. Caselli C

The methanol lines and hot core of OMC2-FIR4, an intermediate-mass protostar, with Herschel/HIFI

E. Herbst P. Hily-Blant T. Jacq C. Kahane A. Klotz W. Langer B. Lefloch D. Lis A. Lorenzani G. Melnick B. Nisini S. Pacheco L. Pagani B. Parise J. Pearson T. Phillips M. Salez P. Saraceno P. Schilke K

The CHESS spectral survey of star forming regions: Peering into the protostellar shock L1157-B1 - I. Shock chemical complexity

. Demyk P. Encrenaz E. Falgarone A. Fuente M. Gerin P. Goldsmith F. Helmich P. Hennebelle Th. Henning E. Herbst T. Jacq C. Kahane M. Kama A. Klotz W. Langer D. Lis S. Lord J. Pearson T. Phillips P. Saraceno