J/ApJ/913/3 HST opt. & H-band obs. of Cepheids in NGC4051 (Yuan+, 2021)
The Cepheid distance to the narrow-line Seyfert 1 galaxy NGC 4051.
Yuan W., Macri L.M., Peterson B.M., Riess A.G., Fausnaugh M.M.,
Hoffmann S.L., Anand G.S., Bentz M.C., Dalla Bonta E., Davies R.I.,
De Rosa G., Ferrarese L., Grier C.J., Hicks E.K.S., Onken C.A., Pogge R.W.,
Storchi-Bergmann T., Vestergaard M.
<Astrophys. J., 913, 3-3 (2021)>
=2021ApJ...913....3Y 2021ApJ...913....3Y (SIMBAD/NED BibCode)
ADC_Keywords: Photometry, HST; Optical; Photometry, infrared;
Stars, variable; Galaxies, nearby
Keywords: Cepheid variable stars; Distance measure; Cepheid distance
AGN host galaxies; Hubble Space Telescope; HST photometry
Time series analysis; Near infrared astronomy; Distance indicators
Galaxy distances
Abstract:
We derive a distance of D=16.6±0.3Mpc (µ=31.10±0.04mag) to the
archetypal narrow-line Seyfert 1 galaxy NGC 4051 based on Cepheid
period-luminosity relations and new Hubble Space Telescope multiband
imaging. We identify 419 Cepheid candidates and estimate the distance
at both optical and near-infrared wavelengths using subsamples of
precisely photometered variables (123 and 47 in the optical and
near-infrared subsamples, respectively). We compare our independent
photometric procedures and distance-estimation methods to those used
by the Supernovae, H0, for the Equation of State team and find
agreement to 0.01mag. The distance we obtain suggests an Eddington
ratio of dm/dt∼0.2 for NGC 4051, typical of narrow-line Seyfert 1
galaxies, unlike the seemingly odd value implied by previous distance
estimates. We derive a peculiar velocity of -490±34km/s for NGC4051,
consistent with the overall motion of the Ursa Major Cluster in which
it resides. We also revisit the energetics of the NGC 4051 nucleus,
including its outflow and mass accretion rates.
Description:
We obtained optical and NIR HST/WFC3 images (program GO-13765) of a
field that covers a large area of NGC 4051 disk. The NGC 4051
observations include 12, 3, 3, and 6 epochs in F350LP, F555W, F814W,
and F160W, respectively (taken between 2017 Dec 2 (JD2458089.7) and
2018 Feb 12 (JD2458162.6)). The observation baseline spans 73 days,
during which the orientation angle of HST changed once.
We carried out point-spread function (PSF) photometry on the NGC 4051
images following identical procedures to those used in the case of
NGC4151 (Yuan+ 2020, J/ApJ/902/26).
Objects:
----------------------------------------------------------
RA (ICRS) DE Designation(s)
----------------------------------------------------------
12 03 09.61 +44 31 52.6 NGC 4051 = QSO J1203+4431
----------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 66 69 Secondary Standards
table3.dat 27 5027 F350LP light curves
table4.dat 153 419 Properties of Cepheid candidates
--------------------------------------------------------------------------------
See also:
B/hst : HST Archived Exposures Catalog (STScI, 2007)
J/AJ/112/2471 : The Ursa Major cluster. I. (Tully+ 1996)
J/ApJ/508/491 : M101 Cepheids (Stetson+, 1998)
J/ApJ/613/682 : AGN masses & broad-line region sizes (Peterson+, 2004)
J/ApJ/699/539 : Cepheids in SN-Ia host galaxies (Riess+, 2009)
J/ApJ/702/1353 : Hβ and V-band light curves of NGC 4051 (Denney+, 2009)
J/ApJ/720/368 : Color-magnitude relations of galaxies in CDFs (Xue+, 2010)
J/MNRAS/429/2264 : Galaxies in the UMa cluster complex (Karachentsev+, 2013)
J/ApJ/793/108 : SEAMBHs. II. Continuum and Hbeta LCs (Wang+, 2014)
J/MNRAS/444/527 : Tully-Fisher distances for Spitzer galaxies (Sorce+, 2014)
J/MNRAS/445/630 : Early-type galaxies in Ursa Major cluster (Pak+, 2014)
J/AJ/149/183 : gri photometry of variables in NGC 4258 (Hoffmann+, 2015)
J/ApJ/826/56 : HST/WFC3 obs. of Cepheids in SN Ia host gal. (Riess+, 2016)
J/AJ/152/50 : Cosmicflows-3 catalog (CF3) (Tully+, 2016)
J/ApJ/830/10 : HST obs. of Cepheids in SNIa host galaxies (Hoffmann+, 2016)
J/ApJ/843/16 : Galaxy groups within 3500km/s (Kourkchi+, 2017)
J/ApJ/851/21 : SDSS RM project first year of observations (Grier+, 2017)
J/ApJ/876/85 : HST observations for LMC Cepheids (Riess+, 2019)
J/ApJ/885/161 : 90 Cepheid candidates nearby NGC 6814 (Bentz+, 2019)
J/ApJ/902/26 : HST opt. & H-band obs. of Cepheids in NGC4151 (Yuan+, 2020)
J/ApJ/902/145 : Cosmicflows-4: Tully-Fisher distances (Kourkchi+, 2020)
J/ApJ/903/112 : SDSS Hb & CIV reverberation mapped AGNs (Dalla Bonta+, 2020)
J/ApJ/911/12 : HST opt-NIR obs. of Cepheids in NGC5584 (Javanmardi+, 2021)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- ID [24760/433973] Internal identifier
8- 17 F10.6 deg RAdeg [180.76/180.84] Right Ascension (J2000) (1)
19- 27 F9.6 deg DEdeg [44.51/44.57] Declination (J2000) (1)
29- 34 F6.3 mag F350LPmag [22.11/24.77] HST/WFC3 F350LP filter
apparent magnitude
36- 40 F5.3 mag e_F350LPmag [0.01/0.04] Uncertainty in F350LPmag
42- 47 F6.3 mag F555Wmag [22.29/26.3] HST/WFC3 F555W filter apparent
magnitude
49- 53 F5.3 mag e_F555Wmag [0.01/0.09] Uncertainty in F555Wmag
55- 60 F6.3 mag F814Wmag [20.7/25.1] HST/WFC3 F814W filter apparent
magnitude
62- 66 F5.3 mag e_F814Wmag [0.01/0.07] Uncertainty in F814Wmag
--------------------------------------------------------------------------------
Note (1): Coordinates are based on the WCS solution of the first F350LP image.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 I7 --- ID [9734/3368996] Internal identifier
9- 14 F6.3 d JD [0.729/73.602] Julian Date; JD-2458089
16- 21 F6.3 mag F350LPmag [24.48/29.17] HST/WFC3 F350LP filter
apparent magnitude
23- 27 F5.3 mag e_F350LPmag [0.02/0.6] Uncertainty in F350LPmag
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 I7 --- ID [9734/3368996] Internal identifier
9- 18 F10.6 deg RAdeg [180.76/180.84] Right Ascension
(J2000) (1)
20- 28 F9.6 deg DEdeg [44.5/44.6] Declination (J2000) (1)
30- 35 F6.3 d Per [10.46/83.2] Period
37- 41 F5.3 d e_Per [0.05/7.2] Uncertainty in Per
43- 47 F5.3 --- Ls [0.66/6.8] Stetson index L
49- 53 F5.3 mag Amp [0.4/1.55] Amplitude
55- 60 F6.3 mag F350LPmag [24.68/28.26] HST/WFC3 F350LP filter
mean magnitude (2)
62- 66 F5.3 mag e_F350LPmag [0.01/0.9] Uncertainty in F350LPmag
68- 73 F6.3 mag F555Wmag [25.01/28.71] HST/WFC3 F555W filter
mean magnitude (2)
75- 79 F5.3 mag e_F555Wmag [0.03/0.6] Uncertainty in F555Wmag
81- 86 F6.3 mag F814Wmag [23.77/27.15] HST/WFC3 F814W filter
mean magnitude (2)
88- 92 F5.3 mag e_F814Wmag [0.04/0.5] Uncertainty in F814Wmag
94- 99 F6.3 mag F160Wmag [22/26.7]? HST/WFC3 F160W filter mean
magnitude (2)
101- 105 F5.3 mag e_F160Wmag [0.1/0.8]? Uncertainty in F160Wmag
107- 112 F6.2 ct/s/arcsec2 SB [156/983]? F160W band local surface
brightness
114 A1 --- Flag Cepheid flag (3)
116- 121 F6.3 mag DelF350LP [-0.082/0.3] F350LP filter crowding
correction
123- 127 F5.3 mag e_DelF350LP [0.02/0.6] Uncertainty in DelF350LP
129- 134 F6.3 mag DelF814W [-0.05/0.21] F814W filter crowding
correction
136- 140 F5.3 mag e_DelF814W [0.02/0.5] Uncertainty in DelF814W
142- 147 F6.3 mag DelF160W [-0.07/1.8]? F160W filter crowding
correction
149- 153 F5.3 mag e_DelF160W [0.09/0.8]? Uncertainty in DelF160W
--------------------------------------------------------------------------------
Note (1): Coordinates from first F350LP image.
Note (2): Fully-calibrated Vega-system magnitudes, including
crowding corrections and their uncertainties.
Note (3): Flag as follows:
I = Cepheids used for WI period-luminosity relation (PLR);
H = Both WI=F814W-1.3(F555W-F814W) and
WH=F160W-0.386(F555W-F814W) PLRs;
o = Rejected from optical PLRs.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 24-Nov-2022