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J/ApJ/717/L6      Displacement of black hole in M87          (Batcheldor+, 2010)

A displaced supermassive black hole in M87. Batcheldor D., Robinson A., Axon D.J., Perlman E.S., Merritt D. <Astrophys. J., 717, L6-L10 (2010)> =2010ApJ...717L...6B
ADC_Keywords: Active gal. nuclei ; Photometry, HST Keywords: black hole physics - galaxies: individual (M87) - galaxies: nuclei Abstract: Isophotal analysis of M87, using data from the Advanced Camera for Surveys, reveals a projected displacement of 6.8±0.8pc (∼0.1") between the nuclear point source (presumed to be the location of the supermassive black hole, SMBH) and the photo-center of the galaxy. The displacement is along a position angle of 307±17° and is consistent with the jet axis. This suggests the active SMBH in M87 does not currently reside at the galaxy center of mass, but is displaced in the counter-jet direction. Possible explanations for the displacement include orbital motion of an SMBH binary, gravitational perturbations due to massive objects (e.g., globular clusters), acceleration by an asymmetric or intrinsically one-sided jet, and gravitational recoil resulting from the coalescence of an SMBH binary. Description: Our analysis uses the following archived HST/ACS data: ------------------------------------------------- Data Set Aperture Filter Exposure Times PID ------------------------------------------------- j8q0* HRC F606W 2x75s 9829 j92j* HRC F606W 4x80s, 5x48s 10133 j9ei* HRC F606W 6x80s, 3x45s 10617 j9qf* HRC F606W 2x80s, 1x45s 10910 j8l0* HRC F814W 5x100s 9705 j8q0* HRC F814W 8x50s 9829 j92j* HRC F814W 4x50s 10133 j9ei* HRC F814W 6x48s 10617 j9qf* HRC F814W 2x48s 10910 j9e0* WFC F606W 3x500s 10543 j9e0* WFC F814W 3x1440s 10543 ------------------------------------------------- Objects: --------------------------------------------------- RA (2000) DE Designation(s) --------------------------------------------------- 12 30 49.42 +12 23 28.0 M87 = NAME VIRGO GALAXY --------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 38 50 Radial offsets of fitted ellipse centers
See also: B/hst : HST Archived Exposures Catalog (STScI, 2007) J/ApJS/197/33 : The M87 globular cluster system (Strader+, 2011) J/ApJ/703/42 : HST photometry of M87 globular clusters (Peng+, 2009) J/AJ/135/928 : The black hole-bulge relationship (Shen+, 2008) J/AJ/131/866 : Hot populations in M87 globular clusters (Sohn+, 2006) J/ApJ/613/279 : ACS Virgo Cluster Survey. III. M87 (Jordan+, 2004) J/ApJ/559/812 : Globular cluster system in M87 (Hanes+, 2001) J/ApJ/513/733 : Globular cluster system in M87 (Kundu+, 1999) J/ApJ/492/62 : M87 planetary nebulae (Ciardullo+, 1998) J/AJ/115/1801 : VRI photometry of M87 globular clusters (Harris+ 1998) J/AJ/106/493 : Globular clusters in M87 (Lee+, 1993) J/ApJS/73/671 : M87 globular clusters BVI photometry (Couture+, 1990) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 5 F5.3 arcsec HRC-SMA High Resolution Channel semi-major axis 7- 11 F5.3 pc HRC-F606W High Resolution Channel F606W band offset (1) 13- 17 F5.3 pc HRC-F814W High Resolution Channel F814W band offset (1) 19- 23 F5.3 arcsec WFC-SMA Wide Field Channel semi-major axis 25- 30 F6.3 pc WFC-F606W Wide Field Channel F606W band offset (1) 32- 38 F7.3 pc WFC-F814W Wide Field Channel F814W band offset (1)
Note (1): assumed distance of M87 is 16.1Mpc, corresponding to a scale of 77.9pc/arcsec.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-Jun-2012
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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