Access to Astronomical Catalogues

J/ApJ/725/670      Kinematics in the M32 nucleus                    (Seth, 2010)
Gas accretion in the M32 nucleus: past and present.
    Seth A.C.
   <Astrophys. J., 725, 670-676 (2010)>
   =2010ApJ...725..670S
ADC_Keywords: Galaxies, nearby ; Active gal. nuclei ; Radial velocities ;
              Velocity dispersion ; Accretion
Keywords: galaxies: active - galaxies: formation - galaxies: individual (M32) -
          galaxies: kinematics and dynamics - galaxies: nuclei

Abstract:
    Using adaptive optics assisted Gemini/NIFS data, I study the present
    and past gas accretion in the central 3" of the M32 nucleus. From
    changes in the spectral slope and CO line depths near the center, I
    find evidence for unresolved dust emission resulting from black hole
    (BH) accretion. With a luminosity of ∼2x1038erg/s, this dust
    emission appears to be the most luminous tracer of current BH
    accretion, 2 orders of magnitude more luminous than previously
    detected X-ray emission. These observations suggest that using
    high-resolution infrared data to search for dust emission may be an
    effective way to detect other nearby, low-luminosity BHs, such as
    those in globular clusters. I also examine the fossil evidence of gas
    accretion contained in the kinematics of the stars in the nucleus. The
    higher order moments (h3 and h4) of the line-of-sight velocity
    distribution show patterns that are remarkably similar to those seen
    on larger scales in elliptical galaxies and in gas-rich merger
    simulations. The kinematics suggests the presence of two components in
    the M32 nucleus, a dominant disk overlying a pressure supported
    component.

Description:
    Integral field spectra of the central 3"x3" of M32 were obtained with
    Gemini NIFS on 2005 October 23. A total of 11x600s K-band exposures
    were taken. Data were obtained from the Gemini Science Archive.
Objects:
    ---------------------------------------------------------
       RA   (2000)    DE        Designation(s)
    ---------------------------------------------------------
    00 42 41.87   +40 51 57.2   M32 = 2MASX J00424182+4051546
    ---------------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        64     3281   Gemini/NIFS kinematic data of the M32 nucleus


See also:
 J/A+A/539/A138   : RR Lyr variable stars in M32 (Fiorentino+, 2012)
 J/ApJ/708/817    : RR Lyrae variables in M32 and M31 (Fiorentino+, 2010)
 J/ApJS/183/1     : Catalog of central stellar velocity dispersions (Ho+, 2009)
 J/ApJ/707/890    : IR properties of E and S0 galaxies (Temi+, 2009)
 J/ApJ/702/955    : K-band luminosity function from 2MASX (Devereux+, 2009)
 J/MNRAS/382/1552 : Multiwavelength study of nearby galaxy nuclei (Lira+, 2007)
 J/ApJ/532/308    : Hot Horizontal Branch Stars in the Core of M32 (Brown+ 2000)
 J/ApJ/504/113    : F175W and F275W photometry of M31 and M32 (Brown+, 1998)
 J/A+AS/127/117   : Kinematics of galaxies (Prugniel+ 1998)
 J/ApJS/112/315   : Spectroscopic parameters of Seyfert nuclei (Ho+ 1997)
 J/AJ/104/1349    : Infrared-luminous giants in M32 (Freedman, 1992)


Byte-by-byte Description of file: table1.dat

   Bytes Format Units    Label     Explanations

   1-  6  F6.3  arcsec   oRA       Right Ascension offset from Nucleus (1)
   8- 13  F6.3  arcsec   oDE       Declination offset from Nucleus (1)
  15- 21  F7.2  km/s     RV        Radial velocity (2)
  23- 26  F4.2  km/s     e_RV      Uncertainty in RV
  28- 33  F6.2  km/s     sigma     Velocity dispersion (2)
  35- 38  F4.2  km/s     e_sigma   Uncertainty in sigma
  40- 45  F6.3  ---      h3        Skewness (2)
  47- 51  F5.3  ---      e_h3      Uncertainty in h3
  53- 58  F6.3  ---      h4        Kurtosis (2)
  60- 64  F5.3  ---      e_h4      Uncertainty in h4

Note (1): Center of M2: 00:42:41.829+40:51:54.88 (J2000)

Note (2): parameters of the line-of-sight velocity distribution (LOSVD)
     using the penalized-pixel fitting method of Cappellari & Emsellem
     (2004PASP..116..138C)


History:
    From electronic version of the journal
(End)                 Greg Schwarz [AAS], Emmanuelle Perret [CDS]    08-Aug-2012