Show simple item record

dc.contributor.authorGentry, Eric S.
dc.contributor.authorHardcastle, Martin J.
dc.contributor.authorPerlman, Eric S.
dc.contributor.authorBirkinshaw, Mark
dc.contributor.authorWorrall, Diana M.
dc.contributor.authorLenc, Emil
dc.contributor.authorSiemiginowska, Aneta
dc.contributor.authorUrry, C. Megan
dc.contributor.authorMarshall, Herman Lee
dc.date.accessioned2015-09-03T17:43:08Z
dc.date.available2015-09-03T17:43:08Z
dc.date.issued2015-07
dc.date.submitted2015-05
dc.identifier.issn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttp://hdl.handle.net/1721.1/98358
dc.description.abstractNew images of the FR II radio galaxy Pictor A from the Hubble Space Telescope reveal a previously undiscovered tidal tail, as well as a number of jet knots coinciding with a known X-ray and radio jet. The tidal tail is approximately 5'' wide (3 kpc projected), starting 18'' (12 kpc) from the center of Pictor A, and extends more than 90'' (60 kpc). The knots are part of a jet observed to be about 4' (160 kpc) long, extending to a bright hotspot. These images are the first optical detections of this jet, and by extracting knot flux densities through three filters, we set constraints on emission models. While the radio and optical flux densities are usually explained by synchrotron emission, there are several emission mechanisms that might be used to explain the X-ray flux densities. Our data rule out Doppler-boosted inverse Compton scattering as a source of the high-energy emission. Instead, we find that the observed emission can be well described by synchrotron emission from electrons with a low-energy index (p ~ 2) that dominates the radio band, while a high-energy index (p ~ 3) is needed for the X-ray band and the transition occurs in the optical/infrared band. This model is consistent with a continuous electron injection scenario.en_US
dc.language.isoen_US
dc.publisherIOP Publishingen_US
dc.relation.isversionofhttp://dx.doi.org/10.1088/0004-637X/808/1/92en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceIOP Publishingen_US
dc.titleOPTICAL DETECTION OF THE PICTOR A JET AND TIDAL TAIL: EVIDENCE AGAINST AN IC/CMB JETen_US
dc.typeArticleen_US
dc.identifier.citationGentry, Eric S., Herman L. Marshall, Martin J. Hardcastle, Eric S. Perlman, Mark Birkinshaw, Diana M. Worrall, Emil Lenc, Aneta Siemiginowska, and C. Megan Urry. “OPTICAL DETECTION OF THE PICTOR A JET AND TIDAL TAIL: EVIDENCE AGAINST AN IC/CMB JET.” The Astrophysical Journal 808, no. 1 (July 20, 2015): 92. © 2015 The American Astronomical Societyen_US
dc.contributor.departmentKavli Institute for Astrophysics and Space Researchen_US
dc.contributor.mitauthorGentry, Eric S.en_US
dc.contributor.mitauthorMarshall, Herman Leeen_US
dc.relation.journalThe Astrophysical Journalen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsGentry, Eric S.; Marshall, Herman L.; Hardcastle, Martin J.; Perlman, Eric S.; Birkinshaw, Mark; Worrall, Diana M.; Lenc, Emil; Siemiginowska, Aneta; Urry, C. Meganen_US
mit.licensePUBLISHER_POLICYen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record