J/ApJ/830/10 >20yrs of HST obs. of Cepheids in SNIa host gal. (Hoffmann+, 2016)
Optical identification of cepheids in 19 host galaxies of Type Ia supernovae
and NGC 4258 with the Hubble Space Telescope.
Hoffmann S.L., Macri L.M., Riess A.G., Yuan W., Casertano S., Foley R.J.,
Filippenko A.V., Tucker B.E., Chornock R., Silverman J.M., Welch D.L.,
Goobar A., Amanullah R.
<Astrophys. J., 830, 10-10 (2016)>
=2016ApJ...830...10H 2016ApJ...830...10H (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Photometry, HST ; Stars, variable ; Abundances
Keywords: distance scale; galaxies: distances and redshifts;
cosmology: observations; stars: variables: Cepheids
Abstract:
We present results of an optical search conducted as part of the SH0ES
project (Supernovae and H0 for the Equation of State of dark energy)
for Cepheid variable stars using the Hubble Space Telescope (HST) in
19 hosts of Type Ia supernovae (SNe Ia) and the maser-host galaxy
NGC4258. The targets include nine newly imaged SN Ia hosts using a
novel strategy based on a long-pass filter that minimizes the number
of HST orbits required to detect and accurately determine Cepheid
properties. We carried out a homogeneous reduction and analysis of all
observations, including new universal variability searches in all SNIa
hosts, which yielded a total of 2200 variables with well-defined
selection criteria, the largest such sample identified outside the
Local Group. These objects are used in a companion paper to determine
the local value of H0 with a total uncertainty of 2.4%.
Description:
HST observations of Cepheid variables (both archival or newly
obtained) span more than two decades (1994-2016; see table 1).
The earliest Cepheid observations we analyzed were obtained with the
Wide Field and Planetary Camera 2 (WFPC2) as part of the initial
efforts to measure H0 with HST (Freedman+ 2001ApJ...553...47F 2001ApJ...553...47F;
Sandage+ 2006ApJ...653..843S 2006ApJ...653..843S) and were later used by Freedman+
(2012ApJ...758...24F 2012ApJ...758...24F) to reach beyond the LMC for the Carnegie Hubble
Project.
We also re-analyzed observations obtained in previous phases of our
project (Riess+ 2009, J/ApJS/183/109; 2011, J/ApJ/730/119) with the
Advanced Camera for Surveys (ACS) Wide Field Channel (WFC) and/or the
Wide Field Camera 3 (WFC3) Ultraviolet and Visible Channel (UVIS).
Finally, we obtained new observations of nine SN Ia hosts using WFC3.
We obtained the majority of our optical images with these modern
cameras, 113 and 132 unique epochs with ACS and WFC3, respectively,
while WFPC2 contributes a smaller fraction with 67 epochs.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 49 312 HST observations analyzed in this work
table3.dat 55 1095 Local standard stars
table5.dat 94 2200 Cepheid properties
table6.dat 11 20 Minimum period cuts for period-luminosity
relations
table7.dat 53 187 HII region properties
table8.dat 39 20 Galaxy metallicity gradients (12+log[O/H])
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See also:
J/ApJ/826/56 : HST/WFC3 obs. of Cepheids in SN Ia host gal. (Riess+, 2016)
J/A+A/587/A70 : CALIFA face-on spiral gal. oxygen (Sanchez-Menguiano+, 2016)
J/AJ/149/183 : gri photometry of variables in NGC 4258 (Hoffmann+, 2015)
J/AJ/149/117 : LMC infrared survey. I. Photometry of Cepheids (Macri+, 2015)
J/ApJ/799/144 : M31 Cepheids in near-IR (Kodric+, 2015)
J/ApJ/777/79 : HST photometry of Cepheid candidates in M101 (Mager+, 2013)
J/AJ/145/106 : M31 Cepheid disk sample of 1st year of PS1 (Kodric+, 2013)
J/AJ/144/113 : Cepheids and companions in M33 from HST images (Chavez+, 2012)
J/ApJ/748/107 : A global model for MC and Galactic Cepheids (Pejcha+, 2012)
J/ApJ/733/124 : Cepheids in M101 observed with HST (Shappee+, 2011)
J/ApJ/730/119 : HST/WFC3 obs. of Cepheids in SN Ia hosts (Riess+, 2011)
J/ApJ/715/277 : Insights into the Cepheid distance scale (Bono+, 2010)
J/A+A/504/959 : Amplitudes of single-mode Cepheids (Klagyivik+, 2009)
J/ApJS/183/109 : Cepheids in 3 host galaxies (Riess+, 2009)
J/ApJ/699/539 : Cepheids in SN-Ia host galaxies (Riess+, 2009)
J/AcA/58/163 : VI light curves of LMC classical Cepheids (Soszynski+, 2008)
J/ApJ/652/1133 : BVI photometry of NGC 4258 Cepheids (Macri+, 2006)
J/ApJ/627/579 : Photometry of variables in NGC 3370 (Riess+, 2005)
J/AcA/49/223 : BVI photometry of OGLE LMC Cepheids (Udalski+, 1999)
J/ApJ/508/491 : M101 Cepheids (Stetson+, 1998)
J/AJ/115/1016 : M31B eclipsing binaries and Cepheids (Kaluzny+ 1998)
J/ApJ/463/26 : VI photometry of 29 Cepheids in M101. (Kelson+ 1996)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Gal Galaxy
6 A1 --- --- [-]
7- 9 A3 --- Field Field name
11- 15 I5 --- PropID HST Proposal ID number
17- 21 A5 --- Cam HST camera (WFC3, ACS or WFPC2)
23- 32 A10 "Y/M/D" Date UT date of the observation (between 1994-2016)
34- 37 I4 s F555W [470/5500]? Exposure time in F555W filter
39- 42 I4 s F814W [120/7800]? Exposure time in F814W filter
44- 47 I4 s F350LP [600/2288]? Exposure time in F350LP filter
49 A1 --- Flag Drizzle flag (A=Astrodrizzle; M=Multidrizzle)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Gal Galaxy name
7- 13 I7 --- ID Identifier (1)
15- 23 F9.5 deg RAdeg Right Ascension in decimal degrees (J2000)
25- 33 F9.5 deg DEdeg Declination in decimal degrees (J2000)
35- 40 F6.3 mag F555W [20/27.7] HST/F555W band (V) magnitude
42- 44 I3 mmag e_F555W [5/241] Uncertainty in F555Wmag
46- 51 F6.3 mag F814W [19.3/27.1] HST/F814W band (I) magnitude
53- 55 I3 mmag e_F814W [5/170] Uncertainty in F814Wmag
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Note (1): Internal ID number assigned by DAOPHOT.
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Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Gal Galaxy name
7- 15 F9.5 deg RAdeg Right Ascension in decimal degrees (J2000)
17- 25 F9.5 deg DEdeg Declination in decimal degrees (J2000)
27- 34 A8 --- ID Cepheid identifier
36- 41 F6.3 d Per [5/98.8] Period
43- 48 F6.3 mag F555W [22.7/29.1] Mean HST/F555W band (V) magnitude
50- 52 I3 mmag e_F555W [9/335] Uncertainty in F555Wmag
54- 59 F6.3 mag F814W [21.6/27.5] Mean HST/F814W band (I) magnitude
61- 63 I3 mmag e_F814W [7/317] Uncertainty in F814Wmag
65- 69 F5.3 mag AmpV [0.1/1.6]? Light curve amplitude in F555W
71- 75 F5.3 mag AmpI [0.1/1.3]? Light curve amplitude in F814W
77- 81 F5.3 mag AmpWh [0.2/1.6]? Light curve amplitude in F350LP
83- 87 F5.3 [-] Z [8.4/9.4] Metallicity where Z=12+log[O/H]
89- 90 A2 --- Flag Cepheid sample in R16
(Riess+, 2016, J/ApJ/826/56) (1)
92- 94 A3 --- Ref Matches previously published Cepheid (2)
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Note (1): Flag as follows:
H = NIR analysis only in R16;
X = NIR analysis only in R16 but with V-I>1.5;
O = Optical analysis only in R16;
OH = Both.
Note (2): Reference codes as follows:
S99 = Silbermann et al. (1999ApJ...515....1S 1999ApJ...515....1S; <[SHF99] VNN> in Simbad);
M06 = Macri et al. (2006, J/ApJ/652/1133; <[MSB2006] {O/I}-NNNNN> in Simbad);
R11 = Riess et al. (2011, J/ApJ/730/119);
S11 = Shappee & Stanek (2011, J/ApJ/733/124; <[SS2011b] FF-NNNNNN> in Simbad);
F15 = Fausnaugh et al. (2015MNRAS.450.3597F 2015MNRAS.450.3597F; <[FKG2015] NN> in Simbad);
H15 = Hoffmann & Macri (2015, J/AJ/149/183; <[HM2015] CNNN> in Simbad).
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Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Gal Galaxy name
7- 8 I2 d Pmin [5/38] Minimum period cut
10- 11 A2 --- Phot Note on photometry (3)
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Note (3): Note as follows:
N = nearby galaxy (D≲7Mpc) with very deep photometry;
VI = galaxy with time series photometry in F555W and F814W analyzed by
Riess+ 2009, J/ApJ/699/539 and 2011, J/ApJ/730/119, previously
derived Pmin adopted;
W = galaxy with time series photometry in F350LP only,
conservative Pmin adopted;
WF = galaxy with previous WFPC2 photometry in F555W and F814W and deeper
WFC3 master frames in those bands, conservative Pmin adopted.
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Gal Galaxy name
7- 10 A4 --- Name HII region identifier (1)
12- 13 I2 h RAh Hour of Right Ascension (J2000)
15- 16 I2 min RAm Minute of Right Ascension (J2000)
18- 22 F5.2 s RAs Second of Right Ascension (J2000)
24 A1 --- DE- Sign of the Declination (J2000)
25- 26 I2 deg DEd Degree of Declination (J2000)
28- 29 I2 arcmin DEm Arcminute of Declination (J2000)
31- 35 F5.2 arcsec DEs Arcsecond of Declination (J2000)
37- 41 F5.2 kpc r [0.2/21.3] Deprojected galactocentric radius (2)
43- 47 F5.3 [-] Z [8.4/9.4] Metallicity where Z=12+log[O/H]
49- 53 F5.3 [-] e_Z [0.001/0.6] Uncertainty in metallicity (Z)
--------------------------------------------------------------------------------
Note (1): Names starting with 'N' indicate new data observed after analysis
and not utilized in metallicity gradient fits in Table 8.
Note (2): Based on the distances from Table 5 of Riess+, 2016, J/ApJ/826/56.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table8.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Gal Galaxy name
7- 11 F5.3 [-] Z [8.5/9.5] Metallicity Z=12+log[O/H] at r=3kpc
13- 17 F5.3 [-] e_Z [0.02/0.2] Z uncertainty
19- 24 F6.3 [kpc-1] dZ/dr [-0.2/-0.01]? Metallicity gradient
in dex/kpc unit (1)
26- 30 F5.3 [kpc-1] e_dZ/dr [0.002/0.03]? dZ/dr uncertainty
32- 35 F4.2 [-] rms [0.03/0.3]? rms
37- 39 A3 --- Flag Flag(s) (2)
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Note (1): r: deprojected galactocentric radius using the distances from
Table 5 of Riess+, 2016, J/ApJ/826/56.
Note (2): Flag as follows:
a = from Kennicutt et al. (2003ApJ...591..801K 2003ApJ...591..801K);
b = from Bajaja et al. (1999A&AS..136..179B 1999A&AS..136..179B);
f = gradients fixed to given values.
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History:
From electronic version of the journal
References:
Riess et al. Companion paper. 2016ApJ...826...56R 2016ApJ...826...56R Cat. J/ApJ/826/56
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 13-Jan-2017