2007A&A...471..951F


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.21CET11:20:02

2007A&A...471..951F - Astronomy and Astrophysics, volume 471, 951-960 (2007/9-1)

XMM-Newton observation of the classical T Tauri star SU Aurigae and the surrounding field.

FRANCIOSINI E., SCELSI L., PALLAVICINI R. and AUDARD M.

Abstract (from CDS):

We investigate the properties of the X-ray emitting plasma of the classical T Tauri star SU Aurigae and of other sources in the field of view. We use XMM-Newton to obtain a high-resolution RGS spectrum of SU Aur as well as EPIC imaging data and low-resolution spectra of the star and of other X-ray sources in the surrounding field. We reconstruct the emission measure distribution of SU Aur from the RGS spectrum using a line-based method, and we perform multi-temperature fits of the MOS spectra of the strongest sources both for the full observation and for selected time intervals to study their spectral variability. The emission from SU Aur is highly variable, showing three flares during the observation. The MOS spectra indicate a very hot corona, with significant emissivity up to ∼40MK in quiescence, and temperatures up to 140MK during flares. The emission measure distribution derived from the RGS spectrum peaks at logT=7.0; any contribution to the X-ray luminosity from cool plasma (T∼2MK) cannot exceed 5% of the total emission. Abundances are ∼0.3-0.6 solar with the exception of Mg and Ne that are solar. Spatial analysis of the full EPIC field results in the detection of 104 X-ray sources, 6 of which are associated with the known Taurus-Auriga members in the field of view (including SU Aur). The characteristics of the X-ray emission of SU Aur are very similar to those of young active late-type stars, with a very hot corona and flares, suggesting magnetic activity as the origin of most of the X-ray emission, rather than accretion.

Abstract Copyright:

Journal keyword(s): stars: activity - stars: coronae - stars: pre-main sequence - stars: late-type - X-rays: stars - open clusters and associations: individual: Taurus-Auriga

Simbad objects: 39

goto Full paper

goto View the reference in ADS

Number of rows : 39

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* BP Tau TT* 04 19 15.8342975037 +29 06 26.929456808   13.13 12.12 11.89   K5/7Ve 585 0
2 HD 283572 TT* 04 21 58.8482823933 +28 18 06.511915195   9.80 9.03 9.14   G5IVe 262 0
3 V* T Tau TT* 04 21 59.4323326335 +19 32 06.439974179   11.01 9.30 9.80   K0IV/Ve 1239 2
4 NAME Tau-Aur Region SFR 04 30 +25.0           ~ 1182 1
5 NAME Taurus Dark Cloud SFR 04 41.0 +25 52           ~ 3323 0
6 2MASS J04551407+3027272 IR 04 55 14.0853343285 +30 27 27.034610045           ~ 1 0
7 JH 431 * 04 55 22.7868634214 +30 38 07.765909402   17.3       ~ 5 0
8 2MASS J04552333+3027366 BD* 04 55 23.3302505842 +30 27 36.538498322           M6e 24 0
9 2MASS J04553182+3030007 * 04 55 31.8227603146 +30 30 00.581740362   15.2       ~ 3 0
10 2MASS J04553249+3040495 IR 04 55 32.4971741679 +30 40 49.396914855           ~ 1 0
11 2MASS J04554046+3039057 Y*O 04 55 40.4630844567 +30 39 05.616572125           M5e 20 0
12 LDN 1517 DNe 04 55 45 +30 33.0           ~ 93 0
13 V* AB Aur Ae* 04 55 45.8459978418 +30 33 04.293281305 7.20 7.16 7.05 6.96 6.70 A0Ve 901 2
14 2MASS J04554757+3028077 TT* 04 55 47.5774465268 +30 28 07.563998959           M5e 29 0
15 2MASS J04554801+3028050 Y*O 04 55 48.0219978654 +30 28 04.835729170           M5.5 21 0
16 2MASS J04554820+3030160 Y*O 04 55 48.2029119174 +30 30 15.933175155           ~ 15 0
17 HD 31305 * 04 55 48.2337162586 +30 20 16.467049305   7.70 7.60     A0 33 0
18 2MASS J04555605+3036209 TT* 04 55 56.0661543354 +30 36 20.447548655   16.6       M4.0 24 0
19 V* SU Aur TT* 04 55 59.3861369488 +30 34 01.499800471   10.33 9.30 9.17   G2IIIne 525 0
20 V* V397 Aur TT* 04 56 02.0261376554 +30 21 03.635056925   13.07 11.72 11.25   K7e 148 0
21 2MASS J04560534+3025393 IR 04 56 05.35 +30 25 39.3           ~ 1 0
22 2MASS J04560916+3045179 IR 04 56 09.16 +30 45 18.0           ~ 1 0
23 2MASS J04560960+3029318 IR 04 56 09.6537437552 +30 29 31.714255949           ~ 1 0
24 2MASS J04561006+3031235 * 04 56 10.0685164301 +30 31 23.390790081           ~ 1 0
25 2MASS J04561535+3022268 IR 04 56 15.35 +30 22 26.9           ~ 1 0
26 2MASS J04561686+3026528 * 04 56 16.8669631304 +30 26 52.700053467           ~ 1 0
27 2MASS J04561986+3030047 * 04 56 19.8706933787 +30 30 04.602488214           ~ 1 0
28 2MASS J04562475+3034576 * 04 56 24.7575957690 +30 34 57.567274717           ~ 1 0
29 2MASS J04562751+3033420 * 04 56 27.5144990999 +30 33 41.988403709           ~ 1 0
30 2MASS J04563213+3023256 * 04 56 32.1390441898 +30 23 25.677306990           M3 6 0
31 2MASS J04564128+3041347 * 04 56 41.2865141455 +30 41 34.646796159           ~ 1 0
32 2MASS J04564132+3024575 * 04 56 41.3155714994 +30 24 57.765617476           ~ 1 0
33 V* GY Aur Al* 04 56 48.5951267536 +30 35 36.380452628           A8 10 0
34 2MASS J04565038+3028091 IR 04 56 50.3911176675 +30 28 09.102791108           ~ 1 0
35 2MASS J04565237+3038186 * 04 56 52.3789337287 +30 38 18.584428697           ~ 1 0
36 Hen 3-545 TT* 10 59 06.9712894449 -77 01 40.309036535   12.91 11.136   9.596 K4Ve 182 0
37 V* TW Hya TT* 11 01 51.9054298616 -34 42 17.031550898   11.94 10.50 10.626 9.18 K6Ve 1449 1
38 CPD-68 1894 TT* 13 22 07.5420267499 -69 38 12.216304202   11.38 10.393   9.117 K1Ve 123 0
39 HD 319139 BY* 18 14 10.4818974563 -32 47 34.516106830   11.47 10.68   9.11 K5+K7 274 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2007A&A...471..951F and select 'bookmark this link' or equivalent in the popup menu


2019.11.21-11:20:02

© Université de Strasbourg/CNRS

    • Contact