2013A&A...552A...5V


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.20CET16:51:04

2013A&A...552A...5V - Astronomy and Astrophysics, volume 552A, 5-5 (2013/4-1)

Constraints on off-axis jets from stellar tidal disruption flares.

VAN VELZEN S., FRAIL D.A., KOERDING E. and FALCKE H.

Abstract (from CDS):

Many decades of observations of active galactic nuclei (AGN) and X-ray binaries have shown that relativistic jets are ubiquitous when compact objects accrete. One could therefore anticipate the launch of a jet after a star is disrupted and accreted by a massive black hole. This birth of a relativistic jet may have been observed recently in two stellar tidal disruption flares (TDFs), which were discovered in gamma-rays by Swift. Yet no transient radio emission has been detected from the tens of TDF candidates that were discovered at optical to soft X-ray frequencies. Because the sample that was followed-up at radio frequencies is small, the non-detections can be explained by Doppler boosting, which reduces the jet flux for off-axis observers. And since the existing follow-up observation are mostly within ∼10 months of the discovery, the non-detections can also be due to a delay of the radio emission with respect to the time of disruption. We wish to test the conjecture that all TDFs launch jets. We present 5 GHz follow-up observations with the Jansky VLA of seven known TDFs, a significant increase of the number of radio observations of these events. To avoid missing delayed jet emission, our observations probe 1-8 years since the estimated time of disruption. None of the sources are detected, with very deep upper limits at the 10 micro Jansky level. These observations rule out the hypothesis that these TDFs launched jets similar to radio-loud quasars. We also constrain the possibility that the flares hosted a jet identical to Sw 1644+57, the first and best-sampled relativistic TDF. We thus obtain evidence for a dichotomy in the stellar tidal disruption population, implying that the jet launching mechanism is sensitive to the parameters of the disruption.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - radiation mechanisms: non-thermal - galaxies: jets - radio continuum: general

Simbad objects: 20

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Number of rows : 20

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 3C 48 QSO 01 37 41.2995845985 +33 09 35.079126038   16.62 16.20     ~ 2432 2
2 [GBM2008] D1-9 G 02 25 17.0 -04 32 59           ~ 20 0
3 2XLSSd J022539.5-042228 QSO 02 25 39.362 -04 22 28.07       20.889   ~ 5 0
4 [DDM2009] CSS100217 J102913+404220 SN* 10 29 13.0 +40 42 20           SN.IIn 22 0
5 2MASS J12013602+3003052 G 12 01 36.028 +30 03 05.52           ~ 26 0
6 IC 3599 Sy1 12 37 41.1939866364 +26 42 27.492074834   15.7 16.5     ~ 151 0
7 RX J1242.6-1119 PaG 12 42 36.9 -11 19 35           ~ 40 1
8 SDSS J131122.15-012345.6 G 13 11 22.154 -01 23 45.61           ~ 15 0
9 2XMM J132342.2+482701 G 13 23 41.973 +48 27 01.26           ~ 22 0
10 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3620 1
11 [GBM2008] D3-13 G 14 19 29.80863 +52 52 06.3650   22.16   20.139 19.580 ~ 35 0
12 2MASS J14202436+5334117 BLL 14 20 24.3985908313 +53 34 11.155674864   20.49 20.03     ~ 33 0
13 PTF 10iya SN* 14 38 41.00 +37 39 33.6           ~ 26 0
14 NGC 5905 H2G 15 15 23.324 +55 31 01.59   13.6       ~ 245 1
15 PS1-10jh ev 16 09 28.296 +53 40 23.52           ~ 92 0
16 2MASS J16245659+7554560 BLL 16 24 56.5714665760 +75 54 55.978646466     16.60     ~ 50 0
17 GRB 110328A gB 16 44 49 +57 34.9           ~ 313 0
18 [VFG2011] TDE2 ev 23 23 48.615 -01 08 10.34           ~ 12 0
19 [GHC2009] D23H-1 G 23 31 59.536 +00 17 14.58   20.67   19.30 18.83 ~ 19 0
20 [VFG2011] TDE1 ev 23 42 01.406 +01 06 29.30           ~ 12 0

    Equat.    Gal    SGal    Ecl

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2019.11.20-16:51:04

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