... the giant stars $\ensuremath{\gamma}$-Cygni and $\ensuremath{\alpha}$-Persei exhibit a much smaller scatter of points and ...
Tópico(s): Stellar, planetary, and galactic studies
1949 - American Institute of Physics | Physical Review
Najmeh Sheikhi, Maryam Hasheminia, Pouria Khalaj, Hosein Haghi, Akram Hasani Zonoozi, Holger Baumgardt,
... deg$ from the centre of the open cluster Alpha Persei using proper motions and photometry from the PPMXL ... We have identified 810 possible stellar members of Alpha Persei. We derived the global and radial present-day ... slopes at different radii. The global MF of Alpha Persei shows a turnover at m = 0.62 M⊙ ... a total cluster mass of 352 M⊙ for Alpha Persei.
Tópico(s): Gamma-ray bursts and supernovae
2016 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
Victoria V. Nikiforova, Maxim V. Kulesh, A. F. Seleznev, G. Carraro,
... side extracted from Gaia DR2 and centered on Alpha Persei reveals two distinct structures—the Alpha Persei star cluster and a conspicuous stellar stream, as ... massive old cluster. The surface density map of Alpha Persei indicates the presence of tidal tails. While it ...
Tópico(s): Astronomy and Astrophysical Research
2020 - Institute of Physics | The Astronomical Journal
J. R. Stauffer, D. Barrado, J. Bouvier, Heather Morrison, Paul Harding, K. L. Luhman, Thomas Stanke, M. J. McCaughrean, D. M. Terndrup, Lori Allen, Patrick Assouad,
... very low mass members of the relatively young Alpha Persei open cluster from a six square degree CCD ... magnitude diagram for the faint end of the Alpha Persei main sequence. These data allow us to accurately determine the Alpha Persei single-star lithium depletion boundary at M(I$_ ... converts fairly directly into an age for the Alpha Persei cluster of 90 $\pm$ 10 Myr. At this ...
Tópico(s): Astrophysics and Star Formation Studies
1999 - IOP Publishing | The Astrophysical Journal
S. Randich, J. H. M. M. Schmitt, Charles F. Prosser, J. R. Stauffer,
The observations of the 50 Myr old alpha Persei open cluster, performed by the Rosat's position sensitive proportional counter (PSPC), are discussed. The X-ray observations cover an area of about ... the X-ray luminosity distribution functions of the alpha Persei sample and the Pleiades indicated that F and G-type stars in the alpha Persei are more X-ray luminous than their older ...
Tópico(s): Astronomy and Astrophysical Research
1995 - EDP Sciences | Astronomy and Astrophysics
... ADS Photometry and Spectroscopy in The Open Cluster alpha Persei. II. Prosser, Charles F. Abstract Results from a ... and pre-main sequence of the open cluster alpha Persei are presented. New echelle spectroscopy has provided radial ... Radial Velocity; Astrophysics; OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: ALPHA PERSEI full text sources ADS | data products SIMBAD (208)
Tópico(s): Astrophysics and Star Formation Studies
1994 - Institute of Physics | The Astronomical Journal
... Export Citation NASA/ADS Spectroscopic Binaries in the alpha Persei Cluster Morrell, Nidia ; Abt, Helmut A. Abstract An ... and orbital velocities to have occurred. The four Alpha Persei binaries are all relatively wide ones (greater than ... mass ratios, as in the Orion Nebula and Alpha Persei clusters, but repeated captures and disruptions will produce ...
Tópico(s): Stellar, planetary, and galactic studies
1992 - IOP Publishing | The Astrophysical Journal
Mark Odell, M. A. Hendry, A. Collier Cameron,
... and Collier- Cameron, 1993, to the Pleiades and $\alpha$ Persei clusters. The method relies on knowledge of the ... agreement with previous ZAMS fitting determinations, whereas our $\alpha$ Persei distance appears substantially greater. In response to this ... recent semi-empirical main-seqeunce fitting technique to $\alpha$ Persei and confirm the findings of our new distance ...
Tópico(s): Astronomy and Astrophysical Research
1994 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
J. R. Stauffer, Lee Hartmann, B. F. Jones,
... of Newly Discovered, Low-Mass Members of the Alpha Persei Cluster Stauffer, John R. ; Hartmann, Lee W. ; Jones, ... low-mass members of the young open cluster Alpha Persei are identified via a proper-motion study and subsequent photometric and spectroscopic observations. Membership in the cluster is confirmed for a number of the fainter proper-motion candidates from Heckman, Dieckvoss, and Kox (1956). Coordinates, finding charts, BVRI photometry, and rotational velocities are provided for most of the stars. At least two of the stars show peculiar H-alpha emission profiles, with weak but very broad emission ...
Tópico(s): Astrophysics and Star Formation Studies
1989 - IOP Publishing | The Astrophysical Journal
David R. Miller, Ilaria Caiazzo, Jeremy Heyl, Harvey B. Richer, Pier-Emmanuel Tremblay,
... are consistent with them having escaped from the Alpha Persei cluster within the past 81 Myr, the age ... we found five candidate white dwarf escapees from Alpha Persei and obtained spectra for all of them. We ...
Tópico(s): Gamma-ray bursts and supernovae
2022 - IOP Publishing | The Astrophysical Journal Letters
A. P. Hatzes, William D. Cochran,
... Citation NASA/ADS The Radial Velocity Variability of alpha Persei: A Low-Amplitude Cepheid outside the Instability Strip? ... 401H Keywords: STARS: OSCILLATIONS; STARS: INDIVIDUAL CONSTELLATION NAME: ALPHA PERSEI full text sources ADS | data products SIMBAD (3)
Tópico(s): Astronomical Observations and Instrumentation
1995 - IOP Publishing | The Astrophysical Journal
Michael Molnar, T. C. Stephens, Anthony Mallama,
... Citation NASA/ADS OAO 2 observations of the Alpha Persei cluster. Molnar, M. R. ; Stephens, T. C. ; Mallama, A. D. Abstract UV photometry of the Alpha Persei cluster obtained with the OAO 2 satellite is ... looser collection straddling the ZAMS. The data for Alpha Persei itself yield an upper limit of 7.4 ...
Tópico(s): History and Developments in Astronomy
1978 - IOP Publishing | The Astrophysical Journal
... Citation NASA/ADS A photometric survey of the alpha Persei cluster for delta Scuti variables. Slovak, M. H. ... the incidence of Delta Scuti variables in the Alpha Persei cluster, a program of differential photometry was undertaken ...
Tópico(s): Solar and Space Plasma Dynamics
1978 - IOP Publishing | The Astrophysical Journal
J. R. Stauffer, Lee Hartmann, J. N. Burnham, B. F. Jones,
... ADS Evolution of low-mass stars in the alpha Persei cluster. Stauffer, J. R. ; Hartmann, L. W. ; Burnham, J. N. ; Jones, B. F. Abstract The results of a photometric and spectroscopic survey of the Alpha Per cluster are presented in tables, graphs, and ...
Tópico(s): Astrophysics and Star Formation Studies
1985 - IOP Publishing | The Astrophysical Journal
S. Balachandran, David L. Lambert, J. R. Stauffer,
... Lithium in Lower--Main-Sequence Stars of the alpha Persei Cluster Balachandran, Suchitra ; Lambert, David L. ; Stauffer, John R. Abstract Lithium abundances are presented for main-sequence stars of spectral types F, G, and K in the young open cluster Alpha Per. For 46 cluster members, a correlation between ...
Tópico(s): Astrophysics and Star Formation Studies
1988 - IOP Publishing | The Astrophysical Journal
... mass members in the intermediate-age open cluster Alpha Persei are presented. Over 130 low-mass new members have been identified to M(v) about 12.5, almost doubling the previous number of known members. The new membership information suggests a slight upward revision of Alpha Per's age to about 8 x 10 ...
Tópico(s): Astronomy and Astrophysical Research
1992 - Institute of Physics | The Astronomical Journal
R. Rébolo, E. L. Martı́n, A. Magazzù,
... Spectroscopy of a Brown Dwarf Candidate in the alpha Persei Open Cluster Rebolo, Rafael ; Martin, Eduardo L. ; Magazzu, Antonio Abstract Intermediate-resolution spectroscopy in the range 625-775 nm is reported for a faint very-late-type object discovered in two CCD images taken near the center of the Alpha Per cluster. The spectrum shows strong absorption molecular ...
Tópico(s): Astrophysics and Star Formation Studies
1992 - IOP Publishing | The Astrophysical Journal
... IV. a Comparison of Rotational Velocities in the Alpha Persei Cluster and the Pleiades Kraft, Robert P. Abstract ...
Tópico(s): Astrophysics and Star Formation Studies
1967 - IOP Publishing | The Astrophysical Journal
J. R. Stauffer, Rudolph A. Schild, Sallie L. Baliunas, J. L. Africano,
... period estimates were obtained for several Pleiades and Alpha Persei cluster K dwarfs which were identified as rapid ...
Tópico(s): Astrophysics and Star Formation Studies
1987 - Institute of Physics | Publications of the Astronomical Society of the Pacific
Ann Merchant Boesgaard, K.G. Budge, Mary Ramsay,
... Citation NASA/ADS Lithium in the Pleiades and alpha Persei Clusters Boesgaard, Ann Merchant ; Budge, Kent G. ; Ramsay, ...
Tópico(s): Astrophysics and Star Formation Studies
1988 - IOP Publishing | The Astrophysical Journal
J. C. Mermilliod, D. Queloz, M. Mayor,
Context. The Alpha Persei open cluster (Melotte 20) is one of the nearby clusters ( pc) for which a long-term systematic radial- ...
Tópico(s): Astrophysics and Star Formation Studies
2008 - EDP Sciences | Astronomy and Astrophysics
Alpha Persei (HD 20902: F5 Iab) is a luminous, nonvariable supergiant located at the blue edge of the ...
Tópico(s): Astrophysics and Star Formation Studies
2011 - IOP Publishing | The Astrophysical Journal
Charles F. Prosser, Rudolph E. Schild, J. R. Stauffer, B. F. Jones,
... given. The periods and light curves for seven alpha Persei members, two Pleiades members, and one nake T ...
Tópico(s): Astronomy and Astrophysical Research
1993 - Institute of Physics | Publications of the Astronomical Society of the Pacific
... fast rotating active members of the Pleiades and Alpha Persei star clusters was undertaken in the fall of ...
Tópico(s): Astro and Planetary Science
2001 - EDP Sciences | Astronomy and Astrophysics
J. R. Stauffer, Charles F. Prosser, M. S. Giampapa, Mark S. Soderblom, Theodore Simon,
... of a set of proposed members of the Alpha Persei open cluster which had previously been shown to have anomalously low lithium abundances. We have used the new spectra to derive Ca II emission strengths, radial velocities, and reddening estimates in order to assess whether these stars truly are members of the Alpha Per cluster. We conclude that most of the ...
Tópico(s): Chromosomal and Genetic Variations
1993 - Institute of Physics | The Astronomical Journal
G. V. Coyne, S. Tapia, F. J. Vrba,
... stars that are highly probable members of the Alpha Persei star cluster and of certain surrounding stars in ...
Tópico(s): Astrophysics and Star Formation Studies
1979 - Institute of Physics | The Astronomical Journal
... early F-type stars in the Pleiades and Alpha Persei star clusters used to determine chromospheric activity levels. ...
Tópico(s): Astrophysics and Star Formation Studies
2000 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
J. R. Stauffer, D. Barrado, J. Bouvier, N. Lodieu, M. J. McCaughrean,
... wide-field optical imaging survey of the young Alpha Persei cluster which reveals a well-populated lower main sequence extending into the substellar mass regime. Subsequent infrared photometry confirms that most of the candidate brown dwarfs are indeed likely to be cluster members, with a predicted minimum mass of order 0.035 solar masses. We have combined the new candidate list with previous member catalogs to derive an IMF for Alpha Per; the slope of the IMF at the ...
Tópico(s): Spectroscopy and Laser Applications
2003 - Cambridge University Press | Symposium - International Astronomical Union
Jesse L. Greenstein, W. A. Hiltner,
... of the F Stars Alpha Canis Minoris and Alpha Persei. III. Greenstein, Jesse L. ; Hiltner, W. A. Abstract ...
Tópico(s): Cephalopods and Marine Biology
1949 - IOP Publishing | The Astrophysical Journal
K. M. Strom, Francis P. Wilkin, S. E. Strom, R. Seaman,
... line strengths for main-sequence stars in the Alpha Persei cluster. It was found that the maximum Li abundances among the PMS stars with solar mass values greater than 1.0 exceed the maximum abundances for Alpha Per stars by at least 0.3 dex. ...
Tópico(s): Astronomy and Astrophysical Research
1989 - Institute of Physics | The Astronomical Journal