J/ApJS/218/10 HET Massive Galaxy Survey (HETMGS) (van den Bosch+, 2015)
Hunting for supermassive black holes in nearby galaxies with the Hobby-Eberly
Telescope.
van den Bosch R.C.E., Gebhardt K., Gultekin K., Yildirim A., Walsh J.L.
<Astrophys. J. Suppl. Ser., 218, 10 (2015)>
=2015ApJS..218...10V 2015ApJS..218...10V
ADC_Keywords: Galaxies, spectra ; Radial velocities ; Velocity dispersion ;
Surveys
Keywords: catalogs; galaxies: elliptical and lenticular, cD; galaxies: spiral;
galaxies: structure; quasars: supermassive black holes; surveys
Abstract:
We have conducted an optical long-slit spectroscopic survey of 1022
galaxies using the 10m Hobby-Eberly Telescope (HET) at McDonald
Observatory. The main goal of the HET Massive Galaxy Survey (HETMGS)
is to find nearby galaxies that are suitable for black hole mass
measurements. In order to measure accurately the black hole mass, one
should kinematically resolve the region where the black hole dominates
the gravitational potential. For most galaxies, this region is much
less than an arcsecond. Thus, black hole masses are best measured in
nearby galaxies with telescopes that obtain high spatial resolution.
The HETMGS focuses on those galaxies predicted to have the largest
sphere-of-influence, based on published stellar velocity dispersions
or the galaxy fundamental plane. To ensure coverage over galaxy types,
the survey targets those galaxies across a face-on projection of the
fundamental plane. We present the sample selection and resulting data
products from the long-slit observations, including central stellar
kinematics and emission line ratios. The full data set, including
spectra and resolved kinematics, is available online. Additionally, we
show that the current crop of black hole masses are highly biased
toward dense galaxies and that especially large disks and low
dispersion galaxies are under-represented. This survey provides the
necessary groundwork for future systematic black hole mass measurement
campaigns.
Description:
The HET Massive Galaxy Survey (HETMGS) ran from 2010 April to 2013
August. The total survey consists of 1022 galaxies, with 1265
long-slit spectra taken over 550hr with the Hobby-Eberly Telescope
(HET). All the observations were taken with the Marcario Low
Resolution Spectrograph (LRS; in 4200-7400Å range). The typical
spatial resolution of the observations is 2.5" FWHM.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 113 1261 List of observations and derived parameters of
the HET Massive Galaxy Survey (HETMGS)
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See also:
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
VII/259 : 6dF galaxy survey final redshift release (Jones+, 2009)
J/MNRAS/443/1231 : 6dF Galaxy Survey: Fundamental Plane data (Campbell+, 2014)
J/AJ/147/93 : Simulation of massive early type galaxies (Do+, 2014)
J/ApJ/775/116 : z<0.06 active BH galaxies from SDSS-DR8 (Reines+, 2013)
J/AJ/146/45 : Spectroscopy of 6 early-type galaxies (Rusli+, 2013)
J/ApJS/201/29 : Velocity dispersions in active galaxies (Harris+, 2012)
J/ApJS/199/26 : The 2MASS Redshift Survey (2MRS) (Huchra+, 2012)
J/MNRAS/413/813 : ATLAS3D project. I. (Cappellari+, 2011)
J/ApJ/727/20 : The Megamaser Cosmology Project (MCP). III. (Kuo+, 2011)
J/ApJS/183/1 : Catalog of central stellar velocity dispersions (Ho+, 2009)
J/ApJ/692/856 : Supermassive BH masses upper limits (Beifiori+, 2009)
J/ApJ/670/105 : Velocity profile of NGC 4151 (Onken+, 2007)
J/ApJ/662/808 : Cusp radius in luminous elliptical galaxies (Lauer+, 2007)
J/MNRAS/371/703 : MILES library of empirical spectra (Sanchez-Blazquez+, 2006)
J/MNRAS/305/259 : EFAR galaxies redshifts+velocity dispersions (Wegner+, 1999)
J/ApJS/100/105 : Stellar velocity dispersions. II. (McElroy 1995)
http://www2.mpia-hd.mpg.de/~bosch/hetmgs/ : HETMGS home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- 2M The 2MASS identifier if any (1)
18- 27 A10 --- Name HETMGS identifier (1026 unique galaxies)
29- 34 I6 --- Frame HET/LRS frame number
36- 44 F9.3 d MJD Modified Julian Date of observation
46- 48 I3 deg PA [-62/460] Position angle of galaxy major axis
(and of slit when practical)
50- 52 F3.1 arcsec slit [1/2] Slit width
54- 60 F7.1 km/s HRV [-359/37554]? Stellar heliocentric velocity
62- 66 F5.1 km/s e_HRV [0/189.1]? Uncertainty in HRV
68- 72 F5.1 km/s sigma [10/923]? Velocity dispersion of central 3.5"
74- 78 F5.1 km/s e_sigma [2/187]? Uncertainty in sigma
80- 84 F5.2 [-] N2/Ha [-2.1/1.3]? log([NII]/Hα) emission
line ratio
86- 89 F4.2 [-] e_N2/Ha [0/1.3]? Uncertainty in N2/Ha
91- 95 F5.2 [-] O3/Hb [-2.2/1.5]? log([OIII]/Hβ) emission
line ratio
97-100 F4.2 [-] e_O3/Hb [0/1.1]? Uncertainty in O3/Hb
102-105 I4 --- AoN2 [0/1113]? Amplitude-over-Noise
of [NII]/Hα (2)
107-109 I3 --- AoN3 [0/170]? Amplitude-over-Noise
of [OIII]/Hβ (2)
111-113 A3 --- AGN "AGN" indication
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Note (1): The 16 digit 2MASS XSC identifier (Cat. VII/233),
or the 14 digit 2MASSi identifier (J2000).
Note (2): When present, emission lines are obtained using GANDALF
(Sarzi et al. 2006MNRAS.366.1151S 2006MNRAS.366.1151S). We consider an emission as
detected when the residuals underneath the line are four times lower
than the amplitude of the line (amplitude-over-noise AoN>4).
The errors on the emission lines are directly computed by GANDALF.
See section 3.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 08-Jul-2015