2010A&A...518L.126P


Query : 2010A&A...518L.126P

2010A&A...518L.126P - Astronomy and Astrophysics, volume 518, L126-126 (2010/7-2)

The Herschel view of GAS in Protoplanetary Systems (GASPS). First comparisons with a large grid of models.

PINTE C., WOITKE P., MENARD F., DUCHENE G., KAMP I., MEEUS G., MATHEWS G., HOWARD C.D., GRADY C.A., THI W.-F., TILLING I., AUGEREAU J.-C., DENT W.R.F., ALACID J.M., ANDREWS S., ARDILA D.R., ARESU G., BARRADO D., BRITTAIN S., CIARDI D.R., DANCHI W., EIROA C., FEDELE D., DE GREGORIO-MONSALVO I., HERAS A., HUELAMO N., KRIVOV A., LEBRETON J., LISEAU R., MARTIN-ZAIEDI C., MENDIGUTIA I., MONTESINOS B., MORA A., MORALES-CALDERON M., NOMURA H., PANTIN E., PASCUCCI I., PHILLIPS N., PODIO L., POELMAN D.R., RAMSAY S., RIAZ B., RICE K., RIVIERE-MARICHALAR P., ROBERGE A., SANDELL G., SOLANO E., VANDENBUSSCHE B., WALKER H., WILLIAMS J.P., WHITE G.J. and WRIGHT G.

Abstract (from CDS):

The Herschel GASPS key program is a survey of the gas phase of protoplanetary discs, targeting 240 objects which cover a large range of ages, spectral types, and disc properties. To interpret this large quantity of data and initiate self-consistent analyses of the gas and dust properties of protoplanetary discs, we have combined the capabilities of the radiative transfer code MCFOST with the gas thermal balance and chemistry code ProDiMo to compute a grid of ≃300000 disc models (DENT). We present a comparison of the first Herschel/GASPS line and continuum data with the predictions from the DENT grid of models. Our objective is to test some of the main trends already identified in the DENT grid, as well as to define better empirical diagnostics to estimate the total gas mass of protoplanetary discs. Photospheric UV radiation appears to be the dominant gas-heating mechanism for Herbig stars, whereas UV excess and/or X-rays emission dominates for T Tauri stars. The DENT grid reveals the complexity in the analysis of far-IR lines and the difficulty to invert these observations into physical quantities. The combination of Herschel line observations with continuum data and/or with rotational lines in the (sub-)millimetre regime, in particular CO lines, is required for a detailed characterisation of the physical and chemical properties of circumstellar discs.

Abstract Copyright:

Journal keyword(s): astrochemistry - circumstellar matter - protoplanetary disks - stars: formation - radiative transfer - line: formation

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 V* ET Cha Or* 08 43 18.5853516024 -79 05 18.232481832     13.97     M2 77 0
2 V* TW Hya TT* 11 01 51.9053285064 -34 42 17.033218380   11.94 10.50 10.626 9.18 K6Ve 1787 1
3 HD 169142 Ae* 18 24 29.7799891464 -29 46 49.327400568   8.42 8.16     F1VekA3mA3_lB? 408 2
4 HD 181327 PM* 19 22 58.9437222504 -54 32 16.975668624   7.50 7.04   6.49 F6V 268 0

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2023.01.31-01:08:48

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