Publications (51)
RR Lyrae Research with the Kepler Mission
K. Kinemuchi
The Kepler Mission is a Discovery mission supported by NASA's Science Mission Directorate, and its primary aim is to discover Earth-sized planets in the habitable zone of solar-typ…
RR Lyrae Stars and Anomalous Cepheids in the Draco Dwarf Spheroidal Galaxy
K. Kinemuchi, H. A. Smith, A. LaCluyze +4
We present new results on RR Lyrae stars and anomalous Cepheids in the Draco dwarf spheroidal galaxy. We have increased the number of double-mode RR Lyrae stars and found three new…
Spectroscopic confirmation of the binary nature of the hybrid pulsator KIC 5709664 found with the frequency modulation method
A. Derekas, S. J. Murphy, G. Dalya +14
We started a program to search for companions around hybrid Sct/ Dor stars with the frequency modulation method using Kepler data. Our best candidate was KIC 5709664, wher…
SDSS-IV eBOSS emission-line galaxy pilot survey
J. Comparat, T. Delubac, S. Jouvel +83
The Sloan Digital Sky Survey IV extended Baryonic Oscillation Spectroscopic Survey (SDSS-IV/eBOSS) will observe 195,000 emission-line galaxies (ELGs) to measure the Baryonic Acoust…
Chemodynamics of the Milky Way. I. The first year of APOGEE data
F. Anders, C. Chiappini, B. X. Santiago +38
We investigate the chemo-kinematic properties of the Milky Way disc by exploring the first year of data from the Apache Point Observatory Galactic Evolution Experiment (APOGEE), an…
Seismic evidence for a rapidly rotating core in a lower-giant-branch star observed with Kepler
S. Deheuvels, R. A. Garcia, W. J. Chaplin +24
Rotation is expected to have an important influence on the structure and the evolution of stars. However, the mechanisms of angular momentum transport in stars remain theoretically…
Planetary Candidates Observed by Kepler, III: Analysis of the First 16 Months of Data
Natalie M. Batalha, Jason F. Rowe, Stephen T. Bryson +69
New transiting planet candidates are identified in sixteen months (May 2009 - September 2010) of data from the Kepler spacecraft. Nearly five thousand periodic transit-like signals…
VVV DR1: The First Data Release of the Milky Way Bulge and Southern Plane from the Near-Infrared ESO Public Survey VISTA Variables in the Via Lactea
R. K. Saito, M. Hempel, D. Minniti +107
The ESO Public Survey VISTA Variables in the Via Lactea (VVV) started in 2010. VVV targets 562 sq. deg in the Galactic bulge and an adjacent plane region and is expected to run for…
Northern Sky Variability Survey (NSVS): Public data release
P. R. Wozniak, W. T. Vestrand, C. W. Akerlof +15
The Northern Sky Variability Survey (NSVS) is a temporal record of the sky over the optical magnitude range from 8 to 15.5. It was conducted in the course of the first generation R…
Evidence for a metal-poor population in the inner Galactic Bulge
M. Schultheis, K. Cunha, G. Zasowski +14
The inner Galactic Bulge has, until recently, been avoided in chemical evolution studies due to extreme extinction and stellar crowding. Large, near-IR spectroscopic surveys, such…
Light Curves and Period Changes of Type II Cepheids in the Globular Clusters M3 and M5
Katie Rabidoux, Horace A. Smith, Barton J. Pritzl +20
Light curves in the B, V, and I_c passbands have been obtained for the type II Cepheids V154 in M3 and V42 and V84 in M5. Alternating cycle behavior, similar to that seen among RV…
First Kepler results on RR Lyrae stars
K. Kolenberg, R. Szabó, D. W. Kurtz +21
We present the first results of our analyses of selected RR Lyrae stars for which data have been obtained by the Kepler Mission. As expected, we find a significant fraction of the…
Granulation in Red Giants: observations by the Kepler mission and 3D convection simulations
S. Mathur, S. Hekker, R. Trampedach +18
The granulation pattern that we observe on the surface of the Sun is due to hot plasma from the interior rising to the photosphere where it cools down, and descends back into the i…
The Leo IV dwarf spheroidal galaxy: color-magnitude diagram and pulsating stars
M. I. Moretti, M. Dall'Ora, V. Ripepi +10
We present the first V, B-V color-magnitude diagram of the Leo IV dwarf spheroidal galaxy, a faint Milky Way satellite recently discovered by the Sloan Digital Sky Survey. We have…
VISTA Variables in the Via Lactea (VVV): The public ESO near-IR variability survey of the Milky Way
D. Minniti, P. W. Lucas, J. P. Emerson +63
We describe the public ESO near-IR variability survey (VVV) scanning the Milky Way bulge and an adjacent section of the mid-plane where star formation activity is high. The survey…
Deep HST Photometry of NGC 6388: Age and Horizontal Branch Luminosity
M. Catelan, P. B. Stetson, B. J. Pritzl +5
Using the Hubble Space Telescope, we have obtained the first color-magnitude diagram (CMD) to reach the main-sequence turnoff of the Galactic globular cluster NGC 6388. From a comp…
Pulsating Variable Stars in the Coma Berenices dwarf spheroidal galaxy
I. Musella, V. Ripepi, G. Clementini +8
We present B, V, I time-series photometry of the Coma Berenices dwarf spheroidal galaxy, a faint Milky Way satellite, recently discovered by the Sloan Digital Sky Survey. We have o…
On the newly discovered Canes Venatici II dSph galaxy
C. Greco, M. Dall'Ora, G. Clementini +11
We report on the detection of variable stars in the Canes Venatici II (CVn II) dwarf spheroidal galaxy, a new satellite of the Milky Way recently discovered by the Sloan Digital Sk…
The Sloan Digital Sky Survey Reverberation Mapping Project: Improving Lag Detection with an Extended Multi-Year Baseline
Yue Shen, C. J. Grier, Keith Horne +32
We investigate the effects of extended multi-year light curves (9-year photometry and 5-year spectroscopy) on the detection of time lags between the continuum variability and broad…
Analysis of RR Lyrae Stars in the Northern Sky Variability Survey
K. Kinemuchi, H. A. Smith, P. R. Wozniak +2
We use data from the Northern Sky Variability Survey (NSVS), obtained from the first generation Robotic Optical Transient Search Experiment (ROTSE-I), to identify and study RR Lyra…
Solar-like oscillations from the depths of the red-giant star KIC 4351319 observed with Kepler
M. P. Di Mauro, D. Cardini, G. Catanzaro +17
We present the results of the asteroseismic analysis of the red-giant star KIC 4351319 (TYC 3124-914-1), observed for 30 days in short-cadence mode with the Kepler satellite. The a…
Mapping the Interstellar Medium with Near-Infrared Diffuse Interstellar Bands
G. Zasowski, B. Menard, D. Bizyaev +10
We map the distribution and properties of the Milky Way's interstellar medium as traced by diffuse interstellar bands (DIBs) detected in near-infrared stellar spectra from the SDSS…
Seismic evidence for non-synchronization in two close sdB+dM binaries from Kepler photometry
Herbert Pablo, Steven D. Kawaler, M. D. Reed +16
We report on extended photometry of two pulsating sdB stars in close binaries. For both cases, we use rotational splitting of the pulsation frequencies to show that the sdB compone…
Demystifying Kepler Data: A Primer for Systematic Artifact Mitigation
K. Kinemuchi, T. Barclay, M. Fanelli +3
The Kepler spacecraft has collected data of high photometric precision and cadence almost continuously since operations began on 2009 May 2. Primarily designed to detect planetary…
Little Bear's Pulsating Stars: Variable Star Census of dSph UMi Galaxy
K. Kinemuchi, E. Jeffery, C. Kuehn +2
Recent observations and a photometric search for variable stars in the Ursa Minor dwarf spheroidal galaxy (UMi dSph) are presented. Our observations were taken at Apache Point Obse…
Fundamental properties of five Kepler stars using global asteroseismic quantities and ground-based observations
O. L. Creevey, G. Dogan, A. Frasca +34
We present an asteroseismic study of the solar-like stars KIC 11395018, KIC 10273246, KIC 10920273, KIC 10339342, and KIC 11234888 using short-cadence time series of more than eigh…
Observations of intensity fluctuations attributed to granulation and faculae on Sun-like stars from the Kepler mission
C. Karoff, T. L. Campante, J. Ballot +6
Sun-like stars show intensity fluctuations on a number of time scales due to various physical phenomena on their surfaces. These phenomena can convincingly be studied in the freque…
The Variable Stars of the Draco Dwarf Spheroidal Galaxy - Revisited
K. Kinemuchi, H. C. Harris, Horace A. Smith +4
We present a CCD survey of variable stars in the Draco dwarf spheroidal galaxy. This survey, which has the largest areal coverage since the original variable star survey by Baade &…
The Sloan Digital Sky Survey Reverberation Mapping Project: Accretion and Broad Emission Line Physics from a Hypervariable Quasar
Jason Dexter, Shuo Xin, Yue Shen +18
We analyze extensive spectroscopic and photometric data of the hypervariable quasar SDSS J131424+530527 (RMID 017) at z=0.456, an optical "changing look" quasar from the Sloan Digi…
P-MaNGA: Emission Lines Properties - Gas Ionisation and Chemical Abundances from Prototype Observations
F. Belfiore, R. Maiolino, K. Bundy +27
MaNGA (Mapping Nearby Galaxies at Apache Point Observatory) is a SDSS-IV survey that will obtain spatially resolved spectroscopy from 3600 Ã to 10300 Ã for a representative sample…
Stellar Archaeology in the Galactic halo with the Ultra-Faint Dwarfs: VI. Ursa Major II
M. Dall'Ora, K. Kinemuchi, V. Ripepi +11
We present a B, V color-magnitude diagram (CMD) of the Milky Way dwarf satellite Ursa Major II (UMa II), spanning the magnitude range from V ~ 15 to V ~ 23.5 mag and extending over…
The Sloan Digital Sky Survey Reverberation Mapping Project: Initial CIV Lag Results from Four Years of Data
C. J. Grier, Yue Shen, Keith Horne +31
We present reverberation-mapping lags and black-hole mass measurements using the CIV 1549 broad emission line from a sample of 349 quasars monitored as a part of the Sloan Digital…
Period and light curve fluctuations of the Kepler Cepheid V1154 Cyg
A. Derekas, Gy. M. Szabo, L. Berdnikov +11
We present a detailed period analysis of the bright Cepheid-type variable star V1154 Cygni (V =9.1 mag, P~4.9 d) based on almost 600 days of continuous observations by the Kepler s…
The complex case of V445 Lyr observed with Kepler: Two Blazhko modulations, a non-radial mode, possible triple mode RR Lyrae pulsation, and more
E. Guggenberger, K. Kolenberg, J. M. Nemec +13
Rapid and strong changes in the Blazhko modulation of RR Lyrae stars, as they have recently been detected in high precision satellite data, have become a crucial topic in finding a…
The Sloan Digital Sky Survey Reverberation Mapping Project: How Broad Emission Line Widths Change When Luminosity Changes
Shu Wang, Yue Shen, Linhua Jiang +13
Quasar broad emission lines are largely powered by photoionization from the accretion continuum. Increased central luminosity will enhance line emissivity in more distant clouds, l…
A Radial Velocity Survey of the Cygnus OB2 Association
Daniel C. Kiminki, Henry A. Kobulnicky, K. Kinemuchi +7
We conducted a radial velocity survey of the Cygnus OB2 Association over a 6 year (1999 - 2005) time interval to search for massive close binaries. During this time we obtained 113…
The Tenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Apache Point Observatory Galactic Evolution Experiment
Christopher P. Ahn, Rachael Alexandroff, Carlos Allende Prieto +232
The Sloan Digital Sky Survey (SDSS) has been in operation since 2000 April. This paper presents the tenth public data release (DR10) from its current incarnation, SDSS-III. This da…
The Frequency of Warm Debris Disks and Transition Disks in a Complete Sample of Intermediate-Mass GLIMPSE Stars: Placing Constraints on Disk Lifetimes
B. Uzpen, H. A. Kobulnicky, K. Kinemuchi
The incidence of dusty debris disks around low- and intermediate-mass stars has been investigated numerous times in order to understand the early stages of planet formation. Most n…
A variable star population in the open cluster NGC\,6819 observed by the Kepler spacecraft
S. Sanjayan, A. S. Baran, P. Nemeth +1
We present the list of variable stars we found in the \kep\ superstamp data covering approximately nine arcminutes from the central region of NGC6819. This is a continuation of our…
Variable stars in the newly discovered Milky Way satellite in Bootes
M. Dall'Ora, G. Clementini, K. Kinemuchi +7
We present light curves for 12 variable stars identified in the newly discovered satellite of the Milky Way in the Bootes constellation (Belokurov et al. 2006).Our sample inc…
HD 183648: a Kepler eclipsing binary with anomalous ellipsoidal variations and a pulsating component
T. Borkovits, A. Derekas, J. Fuller +16
KIC 8560861 (HD 183648) is a marginally eccentric (e=0.05) eclipsing binary with an orbital period of P_orb=31.973d, exhibiting mmag amplitude pulsations on time scales of a few da…
Fourier analysis of non-Blazhko ab-type RR Lyrae stars observed with the Kepler space telescope
J. M. Nemec, R. Smolec, J. M. Benko +22
Nineteen of the ~40 RR Lyr stars in the Kepler field have been identified as candidate non-Blazhko (or unmodulated) stars. In this paper we present the results of Fourier decomposi…
The Sloan Digital Sky Survey Reverberation Mapping Project: Photometric g and i Light Curves
K. Kinemuchi, Patrick B. Hall, Ian McGreer +28
The Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) program monitors 849 active galactic nuclei (AGN) both spectroscopically and photometrically. The photometric observati…
Kepler 18-b, c, and d: A System Of Three Planets Confirmed by Transit Timing Variations, Lightcurve Validation, Spitzer Photometry and Radial Velocity Measurements
William D. Cochran, Daniel C. Fabrycky, Guillermo Torres +51
We report the detection of three transiting planets around a Sunlike star, which we designate Kepler-18. The transit signals were detected in photometric data from the Kepler satel…
Investigating the properties of granulation in the red giants observed by Kepler
S. Mathur, S. Hekker, R. Trampedach +18
More than 1000 red giants have been observed by NASA/Kepler mission during a nearly continuous period of ~ 13 months. The resulting high-frequency resolution (< 0.03 muHz) allows u…
Ensemble Asteroseismology of Solar-Type Stars with the NASA Kepler Mission
W. J. Chaplin, H. Kjeldsen, J. Christensen-Dalsgaard +56
In addition to its search for extra-solar planets, the NASA Kepler Mission provides exquisite data on stellar oscillations. We report the detections of oscillations in 500 solartyp…
How to Correctly Stitch Together {\it Kepler} Data of a Blazhko Star
L. Ãelik, F. Ekmekçi, J. Nemec +6
One of the most challenging difficulties that precedes the frequency analysis of {\it Kepler} data for a Blazhko star is stitching together the data from different seasons (quarter…
KOI-54: The Kepler Discovery of Tidally-Excited Pulsations and Brightenings in a Highly Eccentric Binary
William F. Welsh, Jerome A. Orosz, Conny Aerts +27
Kepler observations of the star HD 187091 (KID 8112039, hereafter KOI-54) revealed a remarkable light curve exhibiting sharp periodic brightening events every 41.8 days with a supe…
Non-Blazhko RR Lyrae Stars Observed with the KEPLER Space Telescope
J. M. Nemec, R. Smolec, J. M. Benko +22
This paper summarizes the main results of our recent study of the non-Blazhko RR Lyrae stars observed with the Kepler space telescope. These stars offer the opportunity for studyin…
A CCD Search for Variable Stars in the Open Cluster NGC 6611
G. Michalska, Z. KoÅaczkowski, R. Leiton +4
We present the results of the variability survey in the young open cluster NGC 6611 based on observations obtained during 34 nights spanning one year. In total, we found 9…
The Occurrence of Non-Pulsating Stars in the gamma Doradus/delta Scuti Pulsation Instability Region
Joyce A. Guzik, P. A. Bradley, J. Jackiewicz +2
As part of the NASA Kepler Guest Observer program, we requested and obtained long-cadence data on about 2700 faint (magnitude 14-16) Kepler stars with effective temperatures and su…