3C 287
{{Short description|Quasar in the constellation Coma Berenices}}
{{Infobox galaxy|name=3C 287|epoch=J2000.0|constellation name=Coma Berenices|ra={{RA|13|30|37.6900}}|dec={{DEC|+25|09|10.878}}|z=1.055000|h_radial_v=316,281 km/s|dist_ly=7.733 Gly|appmag_v=17.67|appmag_b=18.31|type=CSS|names=4C 25.43, DA 345, NRAO 424, LEDA 2817651, LHE 347, CTA 61, QSO B1328+254|image=File:3C 287 SDSS image.jpg|caption=The quasar 3C 287.}}
3C 287 is a quasar located in the constellation of Coma Berenices. It has a redshift of (z) 1.055,{{Cite journal |last1=Salvesen |first1=G. |last2=Miller |first2=J. M. |last3=Cackett |first3=E. |last4=Siemiginowska |first4=A. |date=2009-02-10 |title=A Deep XMM-Newton Observation of the Quasar 3C 287 |url=https://doi.org/10.1088/0004-637x/692/1/753 |journal=The Astrophysical Journal |volume=692 |issue=1 |pages=753–757 |doi=10.1088/0004-637x/692/1/753 |arxiv=0809.4691 |bibcode=2009ApJ...692..753S |issn=0004-637X}}{{Cite journal |last1=Lehnert |first1=Matthew D. |last2=Miley |first2=George K. |last3=Sparks |first3=William B. |last4=Baum |first4=Stefi A. |last5=Biretta |first5=John |last6=Golombek |first6=Daniel |last7=de Koff |first7=Sigrid |last8=Macchetto |first8=Ferdinando D. |last9=McCarthy |first9=Patrick J. |date=August 1999 |title=Hubble Space Telescope – Snapshot Survey of 3CR Quasars: The Data |url=https://iopscience.iop.org/article/10.1086/313239/fulltext/ |journal=The Astrophysical Journal Supplement Series |volume=123 |issue=2 |pages=351–376 |doi=10.1086/313239 |bibcode=1999ApJS..123..351L |issn=0067-0049|url-access=subscription }} and such classified as a prototype compact steep spectrum source (CSS).{{Cite journal |last1=Fanti |first1=C. |last2=Fanti |first2=R. |last3=Parma |first3=P. |last4=Venturi |first4=T. |last5=Schilizzi |first5=R. T. |last6=Nan Rendong |last7=Spencer |first7=R. E. |last8=Muxlow |first8=T. W. B. |last9=van Breugel |first9=W. |date=1989-06-01 |title=Three prototype compact steep spectrum radio sources. |url=https://articles.adsabs.harvard.edu//full/1989A%26A...217...44F/0000044.000.html |journal=Astronomy and Astrophysics |volume=217 |pages=44–56 |bibcode=1989A&A...217...44F |issn=0004-6361}} This object was first discovered between January and February 1964 via a photographic two-color technique.{{Cite journal |last1=Sandage |first1=Allan |last2=Wyndham |first2=John D. |date=1965-01-01 |title=On the Optical Identification of Eleven New Quasi-Stellar Radio Sources. |url=https://articles.adsabs.harvard.edu/pdf/1965ApJ...141..328S |journal=The Astrophysical Journal |volume=141 |pages=328 |doi=10.1086/148125 |bibcode=1965ApJ...141..328S |issn=0004-637X}}
Description
3C 287 is classified as radio-loud quasar with a gigahertz peaked spectrum. It is found to have continuum radio emission in southwest direction, likely originating from either an M-type star or an underlying galaxy that is located from the object.{{Cite journal |last1=Bremer |first1=M.N. |last2=Crawford |first2=C.S. |last3=Fabian |first3=A.C. |last4=Johnstone |first4=R.M. |date=1992 |title=Extended optical emission around radio-loud quasars at Z of about 1 |url=https://articles.adsabs.harvard.edu/full/1992MNRAS.254..614B/0000620.000.html |journal=Monthly Notices of the Royal Astronomical Society |volume=254 |pages=614–626|doi=10.1093/mnras/254.4.614 |doi-access=free |bibcode=1992MNRAS.254..614B }} It is a candidate precessing source, shown to have a position displacement between 2014 and 2017, likely caused by the brightening of a new component.{{Cite journal |last1=Paragi |first1=Z. |last2=Frey |first2=S. |last3=Sanghera |first3=H. S. |date=1998-10-01 |title=Is 3C 287 a precessing radio source? |url=https://articles.adsabs.harvard.edu/pdf/1998A%26A...338..840P |journal=Astronomy and Astrophysics |volume=338 |pages=840–842 |issn=0004-6361}}{{Cite journal |last1=Titov |first1=Oleg |last2=Frey |first2=Sándor |last3=Melnikov |first3=Alexey |last4=Lambert |first4=Sébastien |last5=Shu |first5=Fengchun |last6=Xia |first6=Bo |last7=González |first7=Javier |last8=Tercero |first8=Belén |last9=Gulayev |first9=Sergey |last10=Weston |first10=Stuart |last11=Natusch |first11=Tim |date=2022-03-14 |title=Unprecedented change in the position of four radio sources |journal=Monthly Notices of the Royal Astronomical Society |volume=512 |issue=1 |pages=874–883 |doi=10.1093/mnras/stac038 |doi-access=free |issn=0035-8711|arxiv=2202.13119 }} A bright companion can be found southwest from the object.{{Cite journal |last1=Hilbert |first1=B. |last2=Chiaberge |first2=M. |last3=Kotyla |first3=J. P. |last4=Tremblay |first4=G. R. |last5=Stanghellini |first5=C. |last6=Sparks |first6=W. B. |last7=Baum |first7=S. |last8=Capetti |first8=A. |last9=Macchetto |first9=F. D. |last10=Miley |first10=G. K. |last11=O’Dea |first11=C. P. |last12=Perlman |first12=E. S. |last13=Quillen |first13=A. |date=2016-07-01 |title=Powerful Activity in the Bright Ages. I. A Visible/IR Survey of High Redshift 3C Radio Galaxies and Quasars |journal=The Astrophysical Journal Supplement Series |volume=225 |issue=1 |pages=12 |doi=10.3847/0067-0049/225/1/12 |doi-access=free |arxiv=1605.03196 |bibcode=2016ApJS..225...12H |issn=0067-0049}}
The radio source of 3C 287 is compact with no signs of a secondary structure.{{Cite journal |last1=Pearson |first1=T. J. |last2=Readhead |first2=A. C. S. |last3=Perley |first3=R. A. |date=May 1985 |title=Compact radio sources in the 3C catalog |url=https://articles.adsabs.harvard.edu//full/1985AJ.....90..738P/0000745.000.html |journal=The Astronomical Journal |volume=90 |pages=738 |doi=10.1086/113782 |bibcode=1985AJ.....90..738P |issn=0004-6256}} Based on radio mapping images made by very long baseline interferometry (VLBI) and MERLIN, it contains several filamentary structures located both west and southwest directions, hinting the continuation of a spiral pattern.{{Cite journal |last1=Nan |first1=R. |last2=Schilizzi |first2=R. T. |last3=Fanti |first3=C. |last4=Fanti |first4=R. |last5=van Breugel |first5=W. J. M. |last6=Muxlow |first6=T. W. |date=1988-01-01 |title=The Radio Structures of the Compact Steep Spectrum Sources 3C119, 3C287, and 3C343 |url=https://articles.adsabs.harvard.edu//full/1988IAUS..129..119R/0000119.000.html |journal=The Impact of VLBI on Astrophysics and Geophysics; Proceedings of the 129th IAU Symposium, Cambridge, MA, May 10-15, 1987 |volume=129 |pages=119|bibcode=1988IAUS..129..119R }} There is a bright compact component located in the center of the source, revealed to be a small radio core whose extent is measured lower than 4 milliarcseconds. There is a curved jet. At both frequencies, the brightness of the source exhibits a decrease with its two-point spectral index showing a shift from 0.5 to 1.5 along a ridge line. Radio polarimetric observations taken by Very Long Baseline Array (VLBA) at sub-arcsecond resolutions, showed the source is classified as point-like. There is a much weaker extension located in the south.{{Cite journal |last1=Mantovani |first1=F. |last2=Rossetti |first2=A. |last3=Junor |first3=W. |last4=Saikia |first4=D. J. |last5=Salter |first5=C. J. |date=2013-06-18 |title=Radio polarimetry of compact steep spectrum sources at sub-arcsecond resolution |url=https://doi.org/10.1051/0004-6361/201220769 |journal=Astronomy & Astrophysics |volume=555 |pages=A4 |doi=10.1051/0004-6361/201220769 |arxiv=1305.1644 |bibcode=2013A&A...555A...4M |issn=0004-6361}}
X-band polarimetric observations of 3C 287 captured by VLBA, found most of the polarized emission originated from the brightest region. Based on results, its magnetic field geometry is found complex exhibiting a 90° on a milliarcsecond scale.{{Cite journal |last1=Dallacasa |first1=D. |last2=Schilizzi |first2=R. T. |last3=Rendong |first3=Nan |date=1998 |title=X-Band VLBA Polarization of 3C 287 |url=https://articles.adsabs.harvard.edu//full/1998ASPC..144..117D/0000117.000.html |journal=International Astronomical Union Colloquium |volume=164 |pages=117–118 |doi=10.1017/s025292110004478x |bibcode=1998ASPC..144..117D |issn=0252-9211}}
References
External links
- [http://simbad.u-strasbg.fr/simbad/sim-id?bibyear1=1850&bibyear2=%24currentYear&submit=Display&Ident=%402159761&Name=7C+132816.2%2B252436&bibdisplay=refsum&bibyear1=1850&bibyear2=%24currentYear#lab_bib 3C 287 on SIMBAD]
- [http://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Obj_id&objid=63377&objname=1&img_stamp=YES&hconst=73.0&omegam=0.27&omegav=0.73&corr_z=1 3C 287 on NASA/IPAC Database]
{{Coma Berenices}}