J/A+A/621/A116 HESS J1825-137 particle transport (H.E.S.S. Collaboration, 2019)
Particle transport within the pulsar wind nebula HESS J1825-137.
H.E.S.S. Collaboration, Abdalla H., Aharonian F., Ait Benkhali F.,
Anguener E.O., Arakawa M., Arcaro C., Armand C., Arrieta M., Backes M.,
Barnard M., Becherini Y., Becker Tjus J., Berge D., Bernloehr K.,
Blackwell R., Boettcher M., Boisson C., Bolmont J., Bonnefoy S.,
Bordas P., Bregeon J., Brun F., Brun P., Bryan M., Buechele M., Bulik T.,
Bylund T., Capasso M., Caroff S., Carosi A., Casanova S., Cerruti M.,
Chakraborty N., Chand T., Chandra S., Chaves R.C.G., Chen A.,
Colafrancesco S., Condon B., Davids I.D., Deil C., Devin J., deWilt P.,
Dirson L., Djannati-Atai A., Dmytriiev A., Donath A., Doroshenko V.,
Drury L.O'C., Dyks J., Egberts K., Emery G., Ernenwein J.-P., Eschbach S.,
Fegan S., Fiasson A., Fontaine G., Funk S., Fuessling M., Gabici S.,
Gallant Y.A., Gate F., Giavitto G., Glawion D., Glicenstein J.F.,
Gottschall D., Grondin M.-H., Hahn J., Haupt M., Heinzelmann G., Henri G.,
Hermann G., Hinton J.A., Hofmann W., Hoischen C., Holch T.L., Holler M.,
Horns D., Huber D., Iwasaki H., Jacholkowska A., Jamrozy M., Jankowsky D.,
Jankowsky F., Jouvin L., Jung-Richardt I., Kastendieck M.A.,
Katarzynski K., Katsuragawa M., Katz U., Kerszberg D., Khangulyan D.,
Khelifi B., King J., Klepser S., Kluzniak W., Komin Nu., Kosack K.,
Kraus M., Lamanna G., Lau J., Lefaucheur J., Lemiere A.,
Lemoine-Goumard M., Lenain J.-P., Leser E., Lohse T., Lopez-Coto R.,
Lypova I., Malyshev D., Marandon V., Marcowith A., Mariaud C.,
Marti-Devesa G., Marx R., Maurin G., Meintjes P.J., Mitchell A.M.W.,
Moderski R., Mohamed M., Mohrmann L., Moore C., Moulin E., Murach T.,
Nakashima S., de Naurois M., Ndiyavala H., Niederwanger F., Niemiec J.,
Oakes L., O'Brien P., Odaka H., Ohm S., Ostrowski M., Oya I., Panter M.,
Parsons R.D., Perennes C., Petrucci P.-O., Peyaud B., Piel Q., Pita S.,
Poireau V., Priyana Noel A., Prokhorov D.A., Prokoph H., Puehlhofer G.,
Punch M., Quirrenbach A., Raab S., Rauth R., Reimer A., Reimer O.,
Renaud M., Rieger F., Rinchiuso L., Romoli C., Rowell G., Rudak B.,
Ruiz-Velasco E., Sahakian V., Saito S., Sanchez D.A., Santangelo A.,
Sasaki M., Schlickeiser R., Schuessler F., Schulz A., Schutte H.,
Schwanke U., Schwemmer S., Seglar-Arroyo M., Senniappan M.,
Seyffert A.S., Shafi N., Shilon I., Shiningayamwe K., Simoni R., Sinha A.,
Sol H., Specovius A., Spir-Jacob M., Stawarz L., Steenkamp R., Stegmann C.,
Steppa C., Takahashi T., Tavernet J.-P., Tavernier T., Taylor A.M.,
Terrier R., Tibaldo L., Tiziani D., Tluczykont M., Trichard C., Tsirou M.,
Tsuji N., Tuffs R., Uchiyama Y., van der Walt D.J., van Eldik C.,
van Rensburg C., van Soelen B., Vasileiadis G., Veh J., Venter C.,
Vincent P., Vink J., Voisin F., Voelk H.J., Vuillaume T., Wadiasingh Z.,
Wagner S.J., Wagner R.M., White R., Wierzcholska A., Yang R., Yoneda H.,
Zaborov D., Zacharias M., Zanin R., Zdziarski A.A., Zech A., Zefi F.,
Ziegler A., Zorn J., Zywucka N.
<Astron. Astrophys. 621, A116 (2019)>
=2019A&A...621A.116H 2019A&A...621A.116H (SIMBAD/NED BibCode)
ADC_Keywords: Pulsars ; Gamma rays
Keywords: gamma rays: general - acceleration of particles - convection -
diffusion - pulsars: general
Abstract:
We present a detailed view of the pulsar wind nebula (PWN) HESS
J1825--137. We aim to constrain the mechanisms dominating the particle
transport within the nebula, accounting for its anomalously large size
and spectral characteristics.
The nebula is studied using a deep exposure from over 12 years of
H.E.S.S. I operation, together with data from H.E.S.S. II improving
the low energy sensitivity. Enhanced energy- dependent morphological
and spatially-resolved spectral analyses probe the Very High Energy
(VHE, E>0.1TeV) gamma-ray properties of the nebula.
The nebula emission is revealed to extend out to 1.5 degrees from the
pulsar, ∼1.5 times further than previously seen, making
HESS J1825-137, with an intrinsic diameter of ∼100pc, potentially the
largest gamma-ray PWN currently known. Characterisation of the
nebula's strongly energy-dependent morphology enables the particle
transport mechanisms to be constrained. A dependence of the nebula
extent with energy of R∝ Ealpha with
alpha=-0.29±0.04(stat)±0.05(sys) disfavours a pure diffusion
scenario for particle transport within the nebula. The total gamma-ray
flux of the nebula above 1∼TeV is found to be
(1.12±0.03(stat)±0.25(sys))x10-11cm-2s-1, corresponding to
∼64% of the flux of the Crab Nebula.
HESS J1825-137 is a PWN with clear energy-dependent morphology at VHE
gamma-ray energies. This source is used as a laboratory to investigate
particle transport within middle-aged PWNe. Deep observations of this
highly spatially-extended PWN enable a spectral map of the region to
be produced, providing insights into the spectral variation within the
nebula.
Description:
FITS files with sky maps corresponding to figures 1 and 3 in the
paper. Spectral points corresponding to figures 2 and 10, as well as
spectral fit information corresponding to table 5 in the paper.
Objects:
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RA (2000) DE Designation(s)
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18 26 13.06 -13 34 48.1 HESS J1825-137 = PSR J1826-1334
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
anaacore.dat 51 16 Spectral points from 0.4deg radius region
(analysis A, fig. 2 in paper)
anaafull.dat 51 17 Spectral points from 0.8deg radius region
(analysis A, fig. 2 in paper)
anabfull.dat 51 17 Spectral points from 0.8deg radius region
(analysis B, fig. 2 in paper)
totspec.dat 51 15 Total spectrum from 38 boxes
(analysis A, (fig. 10 in paper)
boxfits.dat 82 38 Spectral fit information for all boxes
(analysis A, tab. 5 in paper)
list.dat 125 6 List of fits files
fits/* . 6 Individual fits files
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Byte-by-byte Description of file: ana*.dat totspec.dat
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Bytes Format Units Label Explanations
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1- 5 F5.2 TeV Eref Reference energy of the spectral point
7- 15 E9.4 1/cm+2/s/TeV dnde ?=- Differential flux
17- 25 E9.4 1/cm+2/s/TeV E_dnde ?=- Positive error on differential flux
27- 35 E9.4 1/cm+2/s/TeV e_dnde ?=- Negative error on differential flux
37- 45 E9.4 1/cm+2/s/TeV ldnde ?=- Upper limit on differential flux
47- 51 A5 --- isul Flag is true if point is an upper limit
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Byte-by-byte Description of file: boxfits.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- BoxId Box region identifier
4- 13 F10.6 deg RAdeg Right Ascension (J2000)
15- 23 F9.5 deg DEdeg Declination (J2000)
25- 28 F4.2 deg Distdeg Projected distance from pulsar to centre of
box region on sky (degrees)
30- 32 I3 pc Distpc Projected distance from pulsar to centre of
box region on sky (parsec)
34- 37 F4.2 --- gamma Power law spectral index
40- 43 F4.2 --- e_gamma Statistical error on power law
spectral index
46- 49 F4.2 --- s_gamma Systematic error on power law spectral index
52- 59 E8.3 1/cm+2/s Flux1-5 Integrated flux from 1TeV to 5TeV
61- 67 E7.3 1/cm+2/s e_Flux1-5 Statistical error on integrated flux from
1TeV to 5TeV
70- 77 E8.3 1/cm+2/s s_Flux1-5 Systematic error on integrated flux from
1TeV to 5TeV
79- 82 F4.1 --- sigma Significance of the box region
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 22 I3 --- Nx Number of pixels along X-axis
24- 26 I3 --- Ny Number of pixels along Y-axis
28- 31 I4 Kibyte size Size of FITS file
33- 54 A22 --- FileName Name of FITS file, in subdirectory fits
56-125 A70 --- Title Title of the FITS file
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Acknowledgements:
H.E.S.S. Collaboration, contact.hess(at)hess-experiment.eu
Alison Mitchell, alison.mitchell(at)physik.uzh.ch
(End) Patricia Vannier [CDS] 15-Nov-2018