Profile of the \(^{12}\)CO(3-2) Emission Line Detected From the Debris Disc of 49 Ceti

Pham Thi Tuyet Nhung, Pham Tuan Anh, Do Thi Hoai, Pham Ngoc Diep, Nguyen Thi Phuong, Nguyen Thi Thao, Pierre Dariulat


The CO(3-2) emission of the debris disc of the young A star 49 Ceti, known to be particularly gas rich, has been recently detected and measured using the ALMA interferometer. We study the observed line profile and comment on each of the possible contributions to its width. Line broadening is found to be dominated by Keplerian shear and an upper limit of 0.8 kms FWHM is placed on other possible contributions,including temperature, confirming the quietness of the gas contained in the disc and disfavouring models that would require relatively violent events to generate secondary gas.


circumstellar matter, debris disc, individual (49 Ceti)

Full Text:



Beckwith S.V.W. & Sargent A.I. 1993, ApJ, 402, 280

Choquet E., Milli J., Wahhaj Z. et al. 2016, ApJL, 834(2), L12

Hacar A., Alves J., Burkert A. and Goldsmith P. 2016, A&A, 591, A104

Horne K. & Marsh T.R. 1986, MNRAS, 218, 761

Hughes A.M., Wilner D.J., Kamp I. and Hogerheijne M.R. 2008, ApJ, 681,626

Hughes A.M., Lieman-Sifry J., Flaherty K.M. et al. 2017, Radial Surface Density Profiles of Gas and Dust in the

Debris Disk around 49 Ceti, submitted to ApJ

Nhung P.T., Hoai D.T., Tuan-Anh P. et al. 2017, High resolution ALMA observation of the 12CO(3-2) and 350 GHz

continuum emissions of the debris disc of 49 Ceti, submitted to MNRAS, arXiv:1701.02131

Roberge A., Kamp I., Montesinos B. et al. 2013, ApJ, 771, 69

Roberge A., Welsh B.Y., Kamp I. et al. 2014, ApJL, 796, L11

Wahhaj Z., Koerner D.W. & Sargent A.I. 2007, ApJ, 661, 373

Wolf S., Schegerer A., Beuther H. et al. 2008, ApJ, 674, L101

Zuckerman B. and Song I. 2012, ApJ, 758, 77

DOI: Display counter: Abstract : 197 views. PDF : 85 views.


  • There are currently no refbacks.

Editorial Office:

Communications in Physics

1st Floor, A16 Building, 18B Hoang Quoc Viet Street, Cau Giay District, Hanoi, Vietnam

Tel: (+84) 024 3791 7102 


Copyright by