2014A&A...570L..11L


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST15:17:16

2014A&A...570L..11L - Astronomy and Astrophysics, volume 570, L11-11 (2014/10-1)

X-ray emission from an FU Orionis star in early outburst: HBC 722.

LIEBHART A., GUEDEL M., SKINNER S.L. and GREEN J.

Abstract (from CDS):

We conducted the first X-ray observations of the newly erupting FU Ori-type outburst in HBC 722 (V2493 Cyg) with the aim to characterize its X-ray behavior and near-stellar environment during early outburst. We used data from the XMM-Newton and Chandra X-ray observatories to measure X-ray source temperatures and luminosities as well as the gas column densities along the line of sight toward the source. We report a Chandra X-ray detection of HBC 722 with an X-ray luminosity of LX≃4x1030 ergs/s. The gas column density exceeds values expected from optical extinction and standard gas-to-dust ratios. We conclude that dust-free gas masses are present around the star, such as strong winds launched from the inner disk, or massive accretion columns. A tentative detection obtained by XMM-Newton two years earlier after an initial optical peak revealed a fainter X-ray source with only weak absorption.

Abstract Copyright:

Journal keyword(s): stars: individual: HBC 722 - stars: pre-main sequence - X-rays: stars

Simbad objects: 10

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Number of rows : 10

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* DG Tau Or* 04 27 04.6913654419 +26 06 16.041555299 13.57 13.97 10.50 12.28   K6Ve 923 1
2 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 3478 0
3 V* V1118 Ori Or* 05 34 44.9889538895 -05 33 41.344187987 15.053 15.378 14.430 15.22 12.701 M1e 121 0
4 V* FU Ori Or* 05 45 22.3650208559 +09 04 12.296285806   10.72 9.60     F0Iab 708 1
5 V* V1647 Ori Or* 05 46 13.1370923766 -00 06 04.876812846     18.1     ~ 231 1
6 HD 325367 Or* 16 03 05.4914377137 -40 18 25.426543472   11.40 8.50     M0 276 0
7 V* V1515 Cyg Or* 20 23 48.0159810586 +42 12 25.780858811   15.26 13.39 12.03   G0/G2Ib 211 0
8 V* V2493 Cyg Or* 20 58 17.0282353931 +43 53 43.339695195   19.678 18.023 17.67 15.233 K7/M0e 89 0
9 EM* LkHA 190 Or* 20 58 53.7336698326 +44 15 28.384667940   14.26 12.33 12.13   F7/G3I/IIe 476 0
10 V* V1735 Cyg Or* 21 47 20.6624829527 +47 32 03.856911703           ~ 152 0

    Equat.    Gal    SGal    Ecl

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2020.07.04-15:17:16

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