The X-ray spectrum of the classical TTauri star TW Hydrae observed by LETGS aboard Chandra

Home

All issues

Volume 505 / No 2 (October II 2009)

A&A, 505 2 (2009) 755-762

Full HTML

Free Access

Table 2:

Parameters of the 3-T fit to the spectrum of TW Hya.
Parameters
log $N_{\rm H}$ [cm^-2]	20.72(.09)
distance	53.7 pc
w-shift	1.2e-4
broadening	$287~{\rm km~s}^{-1}$
T₁[keV]	0.127(.012)
T₂[keV]	0.264(.007)
T₃[keV]	1.45(.43)
$T_{\rm Bb}$ [keV]	0.187(.016)
EM₁[10⁵¹cm^-3]	11.5(3.3)
EM₂[10⁵¹cm^-3]	26.3(2.1)
EM₃[10⁵¹cm^-3]	9.3(2.5)
$Area_{\rm Bb}$ [10⁸cm²]	3.57(1.7)
$n_{\rm e}$ O VII[10¹¹cm^-3]	6.3(2.6)
$n_{\rm e}$ Ne IX[10¹²cm^-3]	2.5(0.4)
$L_{\rm X1}$ [10³⁰erg/s]^a	0.14(.04)
$L_{\rm X2}$ [10³⁰erg/s]	0.83(.07)
$L_{\rm X3}$ [10³⁰erg/s]	0.29(.08)
$L_{\rm Bb}$ [10³⁰erg/s]	0.43(.20)
$L_{\rm Tot}$ [10³⁰erg/s]	1.69(.22)
		A/O
C	1.26(.23)	1.26(.24)
N	2.87(.31)	2.87(.33)
O	1.00(.04)	1.00(.06)
Ne	10.3(.34)	10.3(.53)
Mg	1.61(.89)	1.61(.89)
Si	1.35(.43)	1.35(.43)
Fe	0.61(.06)	0.61(.06)
Ni	0.70(.49)	0.70(.49)
$\chi^2$ /d.o.f.	1564/1536
$\chi^2_{\rm red}$	1.02

Notes: Statistical 1 $\sigma$ errors are in parentheses. The emitted luminosity
( $L_{\rm X}$ ) is given in the range from 0.3 to 10 keV.

Source LaTeX | All tables | In the text

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.