The Sunday (Dec. 11) after the Nobel Prize ceremony was a slow and quiet day. I slept in a bit (due to having gone to bed so late the night of the cermoney), but not as much as I had intended. That was fine, though, as late in the afternoon I fell asleep, to wake up briefly in the evening, only to fall asleep again. So, the day before yesterday, I slept a lot. (If only you could bank sleep.) The one fun thing I did on Sunday was head down to the Vasa Museum. The Vasa was a ship that was launched in the early 17th century, commissioned by the then-king of Sweden, Gustavus Adolphus II. Its trip didn’t last long; on its first voyage, it tipped, took on water, and sank. In the mid-twentieth century, it was rasied again, and today forms the basis of a museum all about early 17th-century Swedish ships, shipbuilding, and life related to these things. The Vasa was a warship, loaded with cannon. At the time, Sweden was perenially at war with Poland (and sometimes Denmark as well). Ah, the Renaissance.
On Monday, I did a bit more gratuitous walking about Stockholm, and then in the afternoon there was a symposium at the Albanova University Center. This is where SCP member Ariel Goobar is headquartered, along with the graduate students and post-docs who have worked with him and continue to work with him. The symposium was introduced by saying that we’d heard a lot from Saul, Adam, and Brian at the Nobel Lectures; for these two hours, we’d hear from other members of the team. The three laureates moderated, while four different panels representing four different eras of the whole supernova search business gave short talklets about the prehistory of the whole thing. That included Rich Muller talking about the LBL robotic search, as well as Rich’s Nemesis idea that (if I am not mistaken) was the topic of Saul’s thesis, and Bob Kirshner talking about supernova work “back in the day” when he was the thesis advisor for both Brian Schmidt and Adam Reiss. It also included Richard Ellis talking about the original Danish high-redshift supernova search (which wasn’t really succesful; they found only one supernova, and after maximum light). Mark Phillips talked about the genesis of the Calan-Tololo supernova search, which established Type Ia supernovae as calibratable standard candles suitable cosmology, and whose supernovae served as the low-redshift comparison set for both high-redshift teams.
The second panel was about the early days of the project. Carl Pennypacker, Brian Boyle, Heidi Newberg, and Warrick Couch talked about the early days of the SCP, when the weather was extremely frustrating, and Heidi figured she’d get a thesis out of it even if they didn’t manage to find even a single supernova. (The first supernova was found in 1992.) Nick Suntzeff talked about the genesis of the High-Z team.
The next batch of people included Alejandro Clocchiatti and Chris Smith from the High-Z team, and Peter Nugent and myself from the SCP. After Peter told a very funny story abuot observing at the CTIO and neary running over Brian Schmidt in a runaway CTIO volkswagon bug whose brakes had failed, it was difficult to follow myself. In the SCP, we’d only been told what the program was and what we were going to be talking about an hour or so before the thing began, and I had no idea what anybody else was going to say, so I didn’t really plan anything. The result was that I just blathered a little bit about Moore’s Law and computer (and network) technology having made it all possible, and I completely failed to make any of the two or three points I was hoping to make about what it was like to adopt the search software from Alex Kim and Ivan Small, and spend 40-hour days processing the data as it came in during a search run.
Next, Alex Filippenko, Isobel Hook, Chris Lidman, Ron Gilliland, Saurabh Jha, and Alex Kim talked about spectroscopy (showing off how much better an 8m telescope is than a 4m telescope for the more distant supernovae), using HST to observe supernovae, and some other things. Saurabh told an amusing story about performing the supernova photometry. Adam Reiss had been put in charge of the analysis that lead to the High-Z team’s discovery paper by team leader Brian Schmidt. Adam, in turn, had farmed out the work of getting the photometric lightcurves to several team members. When the due date came, he sent out an e-mail to all of them saying (I paraphrase) “thank you! Everybody but one (you know who you are) have turned in your data.” This made Saurabh, a young grad student at the time, feel terrible, because he was the one. He went nuts over the next 36 hours, and managed to get his data in. Only after that, running into Peter Garnevich and Ron Gilliland, did he figure out that in fact nobody had managed to get their data in, and Adam’s message wasn’t entirely serious.
Finally, Ariel Goobar, John Tonry, Peter Garnevich, and Craig Hogan talked about the cosmology analysis. Craig Hogan, the theorist, went last. He pointed out, as we all know, that while we’ve established that the Universe is accelerating, we don’t know why. “Dark Energy” is the name we give to the phenomenon, but we don’t know what it is, or even if it is stuff at all; it may in fact be that we’re seeing the breakdown of General Relativity. Craig and John did, at the end during a Q&A period, rain a bit on everybody’s parade by saying that this field is more or less a dead field. I’ve had similar feelings myself for a few years, but few would agree with me. There are parameters about Dark Energy that can be measured; my suspicion is that we’re just going to keep narrowing the errorbars around the default, not-terribly-interesting answer. (If the values are even slightly different from that answer, it’s extremely interesting. However, you can never prove that that answer is right, you can only shrink the error bars around it. There are arguments, however, why it’s not a waste of time to do this, and I won’t get into it here.)
During the Q&A period, Hubble Space Telescope director Matt Mountain asked a leading question about “can’t we all just get along?” He talked about repeated semesters where the HST time allocation committee would assign time to either Adam or to Saul; inevitably, he would then hear from the other one shortly thereafter. He suggested that with HST having only perhaps five years left, and nothing to follow it very soon, it was a crucial time for them to figure out ways in which the community as a whole could work together. Indeed, it sounded to me like he was inviting them to get together and put in a proposal to ask for a truly impressive amount of HST time, even more than the already-impressive amounts of time that has gone to supernova cosmology work. (This was what triggered Craig Hogan and John Tonry to caution that perhaps beating down the error bars on the two parameters we’ve identified, rather than trying to be more creative, might not be the best way to proceed.)
After the symposium, both groups retired to the Junibcken museum, a museum dedicated to Swedish children’s litrature, in particular the stories of Astrid Lindgren (the author of the Pippi Longstockings books). (I have to admit to being nearly compltely ignorant about those.) We all rode their Story Train (in little cars of 3), that took us through 15-minute tour of lovingly recreated dioramas of scenes from these stories… none of which I recognized. I was sitting with Shane and Stormy Burns as we made the trip, and we agreed that these would probably be delightful to kids who were fans of the books. We also thought that some of the scenes would be quite scary.
At the end of the train ride was a dinner, for both of the teams together. Of course, at the end of the dinner, there were some speeches, which were all quite nice. Alex Filippenko— who started collaborating with Saul on the SCP, but defected to the High-Z team in what I gather was a rather unpleasant falling-out— gave a nice speech crediting the two teams’ differences with being strengths, as each team learned from the other. (And, of course, he mentioned, as did a man from the Royal Swedish Academy (whose name I didn’t get) involved in the Nobel selection, that the fact that there were two different teams with the same result is part of why the world couldn’t just dismiss it right away, as we so far have more or less done with the FTL neutrino result.) Several other peple told stories about various things, including Saul’s father, and the woman from the Swedish diplomat service who had been appointed as Saul’s liaison and shepherd during the whole process. She had only met Saul just this week, but said that she was impressed with how gracious he was talking to nearly everybody. Whether it was a 15-year-old or a colleague, he was always interested when talking to them.
In the end, several people remarked that it was unusal for a group this large, especailly including collabortors, to come out to the Nobel Prize Ceremony. Brian, Adam, and Saul may be the ones with the glory, they may be the ones that history will remember, but they did a good job of sharing some part of the glory with the rest of us during this week. Somebody (I forget who, but it may also have been Alex Filippenko) commented that it’s too bad that too many members of the public think that science is done by individuals working away all by themselves— antisocial individuals, even. For these groups that’s certainly not the case, and indeed this science could never have been accomplished in such a mode. The fact that the Nobel Prize celebrates individuals only serves to cement this model in the public mind. However, as I said, Saul, Brian, and Adam were very generous with making it clear that there are a lot of people who share the credit for this discovery.
And now I’m on my way home; I’ve composed this post in fits and starts along my way home, and won’t finish getting all the pictures embedded until after I’m home in Squamish. (I decided not to attend the Lucia Ball on the 13th, but to head home.)
This last evening, I also got what I think is the coolest souvenir of the trip. The Astrophysical Journal put out a special “Nobel” commemorative reprint of the Perlmutter ’99 paper (as well as the corresponding Riess ’98 paper, although I didn’t see that one). We were all given copies of it. At the end of the night, those of us who were still there passed the copies around to each other to sign. A few signatures are missing, but I do have this Nobel commemorative reprint with the signatures of Saul and all the other authors (including myself). That’s going to get framed and put on my office wall next to the Gruber prize!
I can’t help but get a wee bit choked up when I think about this last week— when I think about the fact that I was a major contributor to one of the coolest discoveries in science in the last couple of decades, and that the world has now recognized that discovery with its highest honor. It’s been quite a week.