1 / 33

Search for New Stellar Sources of Gamma- R ays

Search for New Stellar Sources of Gamma- R ays. Josep Martí Escuela Politécnica Superior de Jaén Universidad de Jaén (UJA) Spain. Search for New Stellar S ources of Gamma- R ays. Josep Martí Escuela Politécnica Superior de Jaén Universidad de Jaén (UJA) Spain

oro
Download Presentation

Search for New Stellar Sources of Gamma- R ays

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Searchfor New StellarSources of Gamma-Rays Josep Martí Escuela Politécnica Superior de Jaén Universidad de Jaén (UJA) Spain

  2. Searchfor New StellarSources of Gamma-Rays Josep Martí Escuela Politécnica Superior de Jaén Universidad de Jaén (UJA) Spain differentaspects of thiswork in collaborationwith: Pedro L. Luque-Escamilla, A. J. Muñoz-Arjonilla, Sánchez-Ayaso, E., & Sánchez-Sutil, J. R. (UJA) Paredes, J. M., & Munar-Adrover, P. (UB) Combi, J. A., Romero, G. E., Del Valle, M. V. (IAR, UNLP)

  3. Outline of thetalk Introduction. Searchfor new gamma-raybinariesusingarchival data. Searchfor new kinds of gamma-raysources in starformingregions: theρ-Ophiuchiand Monoceros R2 cases. Conclusions and futureperspectives.

  4. 1. Introduction

  5. The non-thermal radio counterpart of LS 5039 wasfirstnoticedafterinspection of archivalsurvey data (NVSS).

  6. Currentlyknown gamma-raybinariesinclude: LS I +61303, PSR B1259-63, LS 5039, HESS J0632+057, 1FGL J1018.6-5856, AGL J2241+4454 + …. ? In addition, microquasarsystemsdetected at gamma-raysinclude: Cygnus X-3, Cygnus X-1+ …. ?

  7. Interestingly, some of thecurrentlyknown gamma-raybinaries and new additionstothisclasscorrespondtoobjectsalreadypresent in ancient catalogues of peculiar stars. Forexample: • Catalogue of LuminousStars in theNorthernMilkyWay (Hardorp + 1959-1965): LS I+61303, HESS J0632+057 (LS VI+05 11), … • Catalogue of LuminousStars in theSouthernMilkyWay (Stephenson & Sanduleak 1971): LS 5039, PSR B1259-63 (LS 2883) … • Catalogue of Early-Type Stars Whose Spectra Have Shown Emission Lines (Wackerling 1970): HESS J0632+057 (MWC 656), AGL J2241+4454 (MWC 656) … • Are thereany more similar systemswaitingfordiscovery in the archives? • Systematicsearchescouldstillprovideinterestingresultshere in paralleltoserendipitousdiscoveries.

  8. Cross-Id techniqueshavebeenhistoricallydeveloped in ourgroup (e.g.):

  9. Cross-Id techniqueshavebeenhistoricallydeveloped in ourgroup (e.g.):

  10. Firstsample of possiblecoincidences Accountingforunrelatedcoincidences Combi et al. 2011

  11. 2. Searchfor new gamma-raybinariesusingarchival data

  12. The ideal gamma-raybinary/microquasarcandidatewould be anearly-typestarfoundto be consistent in position with: A gamma-raysource(unassociated) An X-raysource. A non-thermal radio source. Withcorrelatedmulti-λvariability. In practicenotallrequirements are easilyfullfilled. Thecross-Id processisstillgoingone. Someinterestingobjectsfound so far are listed in thenextTable.

  13. http://fermi.gsfc.nasa.gov

  14. Optical (R-band) VES 737, a B-typestarconsistentwithbothan HEAO 2 X-raysource and a Fermi-LAT detection

  15. NVSS (20 cm) VES 737, a B-typestarconsistentwithbothan HEAO 2 X-raysource and a Fermi-LAT detection

  16. Jansky EVLA observations of the 2E 0216.9+6248/VES 737 field of view, carriedout in 2011 at the 20 cm wavelength. No radio counterpartdetected (so far).

  17. 3. Searchfor new kinds of gamma-raysources in starformingregions

  18. Evidence of relativisticparticles in stellar jets frommassiveprotostarshavebeenreported (e.g. HH 80-81, Carrasco-González et al. 2010, Science, 330, 1209).

  19. Bipolar outflows of massiveprotostarsalso produce strong shocksthathavebeenproposed as accelerationsites of gamma-rayemittingparticles (Bosch-Ramon et al. 2010, A&A, 511, A8).

  20. Del Valle et al. (2011)

  21. ρ-Ophiuchi Del Valle et al. (2011)

  22. ρ-Ophiuchi Del Valle et al. (2011)

  23. ρ-Ophiuchi Del Valle et al. (2011)

  24. Monoceros R2

  25. Monoceros R2

  26. Monoceros R2

  27. 4. Conclusions and futureperspectives • Old catalogs of luminous/peculiar starscouldstillhideveryrelevantsourcesforhigh-energyastrophysics. • Whencombinedwithmodernsurveys, cross-Id work has revealed a fewluminousstarsworthtofollow-up as possiblegamma-raybinarycandidates. • New kinds of stellar gamma-raysources are likelytoexist (and be detectable) in nearbystar-formingregions(e.g. ρ-Ophiuchi, Monoceros R2). • Fermi-LAT data accumulatedovertheyearswillplay a major role to test theproposedassociations.

  28. Thankyou!

More Related