J/A+A/638/A111 HST/ACS photometry of KKH22 and KKH34 (Karachentsev+, 2020)
KKH 22, the first dwarf spheroidal satellite of IC 342.
Karachentsev I.D., Makarova L.N., Tully R.B., Anand G.S., Rizzi L.,
Shaya E.J., Afanasiev V.L.
<Astron. Astrophys. 638, A111 (2020)>
=2020A&A...638A.111K 2020A&A...638A.111K (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Galaxies, photometry ; Photometry, HST ;
Spectroscopy
Keywords: galaxies: dwarf - galaxies: distances and redshifts -
galaxies: photometry - galaxies: individual: KKH 22
Abstract:
We present observations with the Advanced Camera for Surveys on the
Hubble Space Telescope of the nearby dwarf spheroidal galaxy
KKH 22 = LEDA 2807114 in the vicinity of massive spiral galaxy IC 342.
We derived its distance of 3.12±0.19Mpc using the Tip of Red Giant
Branch method. We also use the 6-m BTA spectroscopy to measure a
heliocentric radial velocity of globular cluster in KKH 22 to be
+30±10km/s.
The dSph galaxy KKH 22 has the V-band absolute magnitude of -12.19mag
and the central surface brightness µv,0=24.1mag/arcsec2. Both
the velocity and the distance of KKH 22 are consistent with the dSph
galaxy being gravitationally bound to IC 342. Another nearby dIr
galaxy, KKH 34, with a low heliocentric velocity of +106km/s has the
TRGB distance of 7.28±0.36Mpc residing in the background respect to
the IC 342 group. KKH 34 has surprisinly high negative peculiar
velocity of -236±26km/s.
Description:
We present HST/ACS photometry of resolved stars in the nearby dwarf
galaxies KKH 22 and KKH 34. The photometry was performed in F606W
(broad band V) and F814W (broad band I) filters using the DOLPHOT
sofware package (http://purcell.as.arizona.edu/dolphot/). We also
present the fits file of the long-slit spectrum of the KKH22 globular
cluster (GC).
Objects:
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RA (2000) DE Designation(s)
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03 44 56.7 +72 03 52 KKH 22 = [KKH2001] 22 = LEDA 2807114
05 59 40.4 +73 25 40 KKH 34 = [KKH2001] 34 = LEDA 95594
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
kkh22pho.dat 13 5028 KKH22 F606W and F814W magnitudes of resolved stars
kkh34pho.dat 13 3406 KKH34 F606W and F814W magnitudes of resolved stars
list.dat 104 1 Information of fits spectrum
kkh22sp.fit 2880 3753 KKH22 long-slit spectrum
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Byte-by-byte Description of file: kkh22pho.dat kkh34pho.dat
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Bytes Format Units Label Explanations
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1- 6 F6.3 mag F606W F606W stellar magnitude
8- 13 F6.3 mag F814W F814W stellar magnitude
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right Ascension of center (J2000)
4- 5 I2 min RAm Right Ascension of center (J2000)
7- 10 F4.1 s RAs Right Ascension of center (J2000)
11 A1 --- DE- Declination sign of center (J2000)
12- 13 I2 deg DEd Declination of center (J2000)
15- 16 I2 arcmin DEm Declination of center (J2000)
18- 19 I2 arcsec DEs Declination of center (J2000)
21- 24 I4 --- Nx Number of pixels along X-axis
26- 28 I3 --- Ny Number of pixels along Y-axis
30- 39 A10 "date" Obs.date Observation date
41- 44 I4 0.1nm blambda Lower value of wavelength interval
46- 52 F7.2 0.1nm Blambda Upper value of wavelength interval
54- 57 F4.2 0.1nm dlambda Wavelegnth resolution
59- 61 I3 --- Nsp [899] Number of spectra
63- 67 I5 Kibyte size Size of FITS file
69- 79 A11 --- FileName Name of FITS file, in subdirectory fits
81-104 A24 --- Title Title of the FITS file
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Acknowledgements:
Lidia Makarova, lidia.makarova(at)gmail.com
(End) Igor Karachentsev [SAO, Russia], Patricia Vannier [CDS] 07-May-2020