2012A&A...544A.149M


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.25CET09:27:12

2012A&A...544A.149M - Astronomy and Astrophysics, volume 544A, 149-149 (2012/8-1)

U Scorpii 2010 outburst: a new understanding of the binary accretion disk and the secondary star.

MASON E., EDEROCLITE A., WILLIAMS R.E., DELLA VALLE M. and SETIAWAN J.

Abstract (from CDS):

We present optical and near-infrared (NIR) spectroscopic observations of U Sco 2010 outburst. From the analysis of lines profiles we identify a broad and a narrow component and show that the latter originates from the reforming accretion disk. We show that the accretion resumes shortly after the outburst, on day +8, roughly when the super-soft (SSS) X-ray phase starts. Consequently U Sco SSS phase is fueled (in part or fully) by accretion and should not be used to estimate mrem, the mass of accreted material which has not been ejected during the outburst. In addition, most of the He emission lines, and the Heii lies in particular, form in the accretion flow/disk within the binary and are optically thick, thus preventing an accurate abundance determination. A late spectrum taken in quiescence and during eclipse shows CaiiH&K, the G-band and Mgib absorption from the secondary star. However, no other significant secondary star features have been observed at longer wavelengths and in the NIR band.

Abstract Copyright:

Journal keyword(s): novae, cataclysmic variables - stars: individual: U Sco - circumstellar matter

Simbad objects: 14

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Number of rows : 14

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* QR And Al* 00 19 49.9252841335 +21 56 52.166609264   12.38 12.73 11.86   Ss 124 0
2 2E 0035.4-7229 XB* 00 37 19.0 -72 14 14   20.0 20.2     ~ 97 0
3 V* GK Per No* 03 31 12.0096626899 +43 54 15.467450081   10.2 14.0     K1IV 870 0
4 OGLE LMC-SC20 113500 EB* 05 46 46.54 -71 08 53.9     19.163   18.886 ~ 242 0
5 * tet Vir ** 13 09 56.9843568248 -05 32 20.465727623   4.385 4.397     A1IVs 243 0
6 NAME Upper Sco Association As* 16 12 -23.4           ~ 1054 1
7 V* V818 Sco LXB 16 19 55.0688745859 -15 38 25.019920749 11.60 12.40 11.1     Oev 1531 0
8 NOVA Sco 1863 No* 16 22 30.7782086963 -17 52 43.162570042   8.80 8.70     F8+K2 469 0
9 CD-38 10980 WD* 16 23 33.8384178546 -39 13 46.160032569 9.916 10.885 11.029 10.936 10.841 DA2 440 0
10 HD 151395 * 16 48 24.6563653598 -31 12 13.202359107   6.76 6.81     B4V 21 0
11 V* MM Ser LXB 18 39 57.56 +05 02 09.6   19.2 19.2     ~ 323 0
12 NOVA Her 1991 No* 18 46 31.56 +12 14 00.7           ~ 261 0
13 V* V603 Aql No* 18 48 54.6369118792 +00 35 02.855110952 10.73 11.65 11.64     OB+e: 516 0
14 V* DK Lac No* 22 49 46.9314859439 +53 17 19.799282044   5.00       ~ 104 0

    Equat.    Gal    SGal    Ecl

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2020.10.25-09:27:12

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