Greg Fahlman: Working in the Richer Universe at UBC*

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The document discusses Harvey Richer's career in astronomy and geophysics. It summarizes that he received his PhD from the University of Rochester in 1971 and worked at the University of British Columbia from 1971-1979. It also mentions some of his collaborators and research studying globular clusters using color-magnitude diagrams from telescopes including the Canada-France-Hawaii Telescope and Hubble Space Telescope.

Science

Working in the
Richer Universe
Greg Fahlman
May 7, 2019

• HBR  UBC in 1970 PhD: Rochester (S. Sharpless)
• GGF  UBC in 1971 PhD: Toronto (S.P.S Anand)
• Geophysics & Astronomy(?)
Gordon Walker
Jason Auman
Home: Geophysics and Astronomy
M. Ovenden
Paul Hickson
Don Russell
Tad UlrychBob Ellis
Garry Clarke

Collegial Collaboration
Fig. 8.—Low-frequency end of the power spectrum of EG 65
calculated by using MEM. A 1% tracer signal was added to
the data before transformation, and it is indicated in the
figure. A spectral peak is seen at a period of 1311 s as in fig.
8«. The units of power are arbitrary.

Numbers
HBR: 1971-79 GGF: 1971-79 HBR: 1980-89

Numbers
HBR: 1971-79 GGF: 1971-79 GGF: 1980-89

Numbers
HBR: 1971-79 GGF: 1980-89HBR: 1980-89

The Beginning
Fig. 1.—Color-magnitude diagram of the globular cluster M4. There are
469 stars in this diagram, and they represent all stars visible in a 4' x 3’
field of the cluster centered about 5'5 due east of the cluster center. No
reddening or extinction corrections have been applied to the data.

The Next Step
Fig. 1.—M15. This is a
contrast-enhanced
reproduction of the B
CCD image with the axes
labeled to correspond
with the coordinate
positions listed in
the tables found in
Appendix B of the text.
The field is approximately
5' X 3', with north to the
left and east at the top.

The Next Step
An extensive comparison between the
observations and recently calculated
stellar evolutionary sequences is
presented. … From the point of view of
stellar interior theory, these results are
perhaps the best available at this time.
Fig. 11.—An expanded
plot of the upper-right
panel of Fig. 10 with
the individual stars shown
rather than the fiducial
main sequence. The
theoretical giant-branch
sequence for a star of
[Mass= 0.8] is also shown
and is described in detail
in Appendix C.

CFHT Open Cluster Survey
(a)(i) NGC 6791, (ii) NGC 6819, (iii) NGC 7789, (iv) NGC2099 and (v) NGC 2168.

HST: Ultra deep in 47 Tucanae
[Proposal]
Richer has pioneered studies of white dwarf and main sequences in globular clusters(Richer et al.
1995, 2002, 2004, 2006, 2008) and in open clusters (Richer et al. 2000, Kalirai et al. 2001)

47 Tuc: Now and Then
WD: 47Tuc
MS:SMC
MS:47 Tuc
Hesser et al 1987
Kalirai et al 2012

Downtime
Hawi:
December CFHT
Board meeting 2012

Downtime
Hawi:
December CFHT
Board meeting
The Bamboo Restaurant &
Gallery was once voted best
restaurant on island of Hawaii

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Greg Fahlman: Working in the Richer Universe at UBC*

1. Working in the Richer Universe Greg Fahlman May 7, 2019

2. • HBR  UBC in 1970 PhD: Rochester (S. Sharpless) • GGF  UBC in 1971 PhD: Toronto (S.P.S Anand) • Geophysics & Astronomy(?) Gordon Walker Jason Auman Home: Geophysics and Astronomy M. Ovenden Paul Hickson Don Russell Tad UlrychBob Ellis Garry Clarke

3. Office Faculty Club (Lunch)

4. Collegial Collaboration Fig. 8.—Low-frequency end of the power spectrum of EG 65 calculated by using MEM. A 1% tracer signal was added to the data before transformation, and it is indicated in the figure. A spectral peak is seen at a period of 1311 s as in fig. 8«. The units of power are arbitrary.

5. Numbers HBR: 1971-79 GGF: 1971-79

7. Numbers HBR: 1971-79 GGF: 1971-79 HBR: 1980-89

8. Numbers HBR: 1971-79 GGF: 1971-79 GGF: 1980-89

9. Numbers HBR: 1971-79 GGF: 1980-89HBR: 1980-89

10.

11. 471 km

12.

13. The Beginning Fig. 1.—Color-magnitude diagram of the globular cluster M4. There are 469 stars in this diagram, and they represent all stars visible in a 4' x 3’ field of the cluster centered about 5'5 due east of the cluster center. No reddening or extinction corrections have been applied to the data.

14. The Beginning Fig. 1.—Color-magnitude diagram of the globular cluster M4. There are 469 stars in this diagram, and they represent all stars visible in a 4' x 3’ field of the cluster centered about 5'5 due east of the cluster center. No reddening or extinction corrections have been applied to the data. VI. SUMMARY AND DISCUSSION To our knowledge, this also represents the first extensive stellar photometry in a galactic globular cluster done with a CCD detector.

15. The Next Step Fig. 1.—M15. This is a contrast-enhanced reproduction of the B CCD image with the axes labeled to correspond with the coordinate positions listed in the tables found in Appendix B of the text. The field is approximately 5' X 3', with north to the left and east at the top.

16. The Next Step An extensive comparison between the observations and recently calculated stellar evolutionary sequences is presented. … From the point of view of stellar interior theory, these results are perhaps the best available at this time. Fig. 11.—An expanded plot of the upper-right panel of Fig. 10 with the individual stars shown rather than the fiducial main sequence. The theoretical giant-branch sequence for a star of [Mass= 0.8] is also shown and is described in detail in Appendix C.

17. Telescopes

18. CFHT Open Cluster Survey (a)(i) NGC 6791, (ii) NGC 6819, (iii) NGC 7789, (iv) NGC2099 and (v) NGC 2168.

19. HST: Proper Motion Selection NGC6397

20. HST: Ultra deep in 47 Tucanae [Proposal] Richer has pioneered studies of white dwarf and main sequences in globular clusters(Richer et al. 1995, 2002, 2004, 2006, 2008) and in open clusters (Richer et al. 2000, Kalirai et al. 2001)

21. 47 Tuc: Now and Then WD: 47Tuc MS:SMC MS:47 Tuc Hesser et al 1987 Kalirai et al 2012

22. Numbers: Total to Date

23. Downtime Hawi: December CFHT Board meeting 2012

24. Downtime Hawi: December CFHT Board meeting The Bamboo Restaurant & Gallery was once voted best restaurant on island of Hawaii

25. Rio IAU 2009

26. Happy Birthday Harvey!